CN111035451B

CN111035451B - Laser catheter

Info

Publication number: CN111035451B
Application number: CN201811181286.2A
Authority: CN
Inventors: 庞兴学
Original assignee: Individual
Current assignee: Dongzhimen Hospital Of Beijing University Of Chinese Medicine
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2021-04-23
Anticipated expiration: 2038-10-11
Also published as: CN111035451A

Abstract

The invention relates to the field of medical instruments, and provides a laser catheter which comprises a catheter body, wherein the catheter body comprises a head end, a tail end, a catheter wall and a catheter cavity, a plurality of optical fibers which are annularly and continuously distributed or discontinuously distributed are arranged in the catheter wall, and after laser is transmitted to a preset distance away from the head end in the catheter wall through the optical fibers, the laser is shot to the catheter cavity after the cross section of the laser is changed from the longitudinal axis direction of the catheter body, so that tissues entering the catheter cavity are ablated. The laser catheter of the invention provides a new laser ablation mode, namely, a negative pressure or other methods are adopted to introduce target ablation tissues into the lumen of the laser catheter of the invention, and then laser is adopted to ablate the tissues entering the lumen.

Description

Laser catheter

Technical Field

The invention relates to the field of medical instruments, in particular to a laser catheter.

Background

Currently, there are methods for tissue ablation or tissue ablation through blood vessels or other body lumens:

(1) radiofrequency ablation utilizes the thermal effect of radiofrequency current to necrose tissue, controlled to operate at 37-55 ℃, which allows tissue coagulation necrosis but does not liquefy and remove.

(2) The microwave ablation utilizes high-frequency electromagnetic waves to act on tissues to rapidly generate heat to necrose the tissues, the temperature of the tissues rises rapidly, and surrounding tissues are easily damaged.

(3) Tissue rotary cutting utilizes a high-speed rotary grinding drill to cut off tissues or grind and emulsify the tissues into micro particles so as to achieve the purpose of tissue ablation.

(4) Tissue rotational grinding is a method of grinding a rotating head tissue with ultra-high speed rotation or a calcified tissue into ultrafine particles, is mostly applied to calcified tissues, and is easy to cause vascular perforation and interlayer when the tissue is removed by rotational grinding.

(5) Laser ablation current laser ablation catheters provide forward ablation along the longitudinal axis of the catheter, which is a method of ablating tissue that is susceptible to vessel wall damage, such as vessel perforation and dissection. Although excimer laser can be limited to 50-100 microns due to penetration depth, the incidence rate of vascular wall damage is reduced, the current excimer laser catheter cannot ablate tissues entering a lumen.

Chinese patent document CN103747758 describes a laser catheter for bypass surgery and a tubular arrangement of optically limited tubular bundles for emitting laser light, wherein the optical fibers are arranged in an array of bundle structures. Chinese patent document CN1025148C describes a laser surgical instrument for vascular surgery, and describes a driving and servo device for performing laser surgery in the prior art.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a laser catheter, which can realize ablation of tissues entering a catheter lumen and can better prevent ablation damage of non-target tissues.

In order to solve the technical problems, the invention provides a laser catheter which comprises a catheter body, wherein the catheter body comprises a head end, a tail end, a catheter wall and a catheter cavity, one or more optical fibers distributed in an annular mode are fixedly arranged in the catheter wall of the catheter body, and after laser is transmitted to the head end of the laser catheter through the optical fibers, the laser advancing direction is changed by arranging optical fiber bending, an optical fiber side hole or an optical reflection element, so that the laser is perpendicular or nearly perpendicular to the longitudinal axis of the catheter body and is emitted to the catheter cavity, and the tissue in the catheter cavity is ablated.

The optical fiber of the laser catheter of the invention extends to a preset distance away from the head end of the catheter body along the inside of the catheter wall and is provided with an optical fiber bend, an optical fiber side hole, a total reflection device, a reflector, a reflective film, a total reflection device pipeline, a reflective film pipeline, a reflector pipeline or an annular optical fiber, or the components are combined, so that the laser is changed from the longitudinal axis direction of the catheter body 1 to the radial direction of the cross section of the catheter body 1. And slits are arranged in the total reflection device pipeline, the reflection film pipeline and the reflector pipeline in the direction towards the pipe cavity 5 and vertical to the longitudinal axis of the pipe body, and the laser is emitted to the pipe cavity through the slits after the direction is changed. The preset distance is more than or equal to 0 mm, the width of the narrow gap is set to be 1-1000 micrometers, and the width of the optical fiber side hole is set to be 1-1000 micrometers.

Furthermore, the tail end of the tube body of the optical fiber is connected with an external laser emitting device through an optical fiber external connection line.

The invention provides a laser catheter, wherein the tail end of the laser catheter is provided with an external connection port of a lumen, the lumen is connected with a negative pressure suction device, negative pressure is applied through the external connection port, or other modes are adopted to enable target ablation tissues or other substances to enter the lumen of the laser catheter, and then the laser catheter is adopted to ablate the tissues or other substances in the lumen.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic cross-sectional view of a head end of a pipe body according to the present invention.

FIG. 3 is a schematic partial cross-sectional view of the present invention showing the redirection of laser light by bending the fiber.

FIG. 4 is a schematic view of a total reflection device structure adopted in the present invention

Fig. 5 is a schematic structural diagram of another total reflection device adopted by the invention.

FIG. 6 is a schematic partial cross-sectional view of the present invention showing the laser direction changed by a mirror.

FIG. 7 is a partial cross-sectional schematic view of the present invention showing the laser direction being changed by the reflective film.

FIG. 8 is a schematic partial cross-sectional view of the laser direction changed by the reflective film tube of the present invention.

FIG. 9 is a schematic partial cross-sectional view of a total reflection device tube used in the present invention to redirect laser light.

FIG. 10 is a partial cross-sectional view of another total reflection device tube used in the present invention to redirect laser light.

FIG. 11 is a schematic view of a three-dimensional structure of the present invention for changing the direction of laser light by means of a total reflection device pipe.

FIG. 12 is a schematic partial cross-sectional view of the laser redirection via a mirror tunnel according to the present invention.

Fig. 13 is a schematic perspective view of the present invention with a mirror tube for changing the direction of laser light.

FIG. 14 is a schematic perspective view of the present invention showing the laser direction changed by the reflective film tube.

FIG. 15 is a schematic perspective view of the present invention with the side hole of the fiber changing the direction of the laser.

Fig. 16 is a schematic perspective view of embodiment 10 of the present invention.

Fig. 17 is a schematic perspective view of embodiment 11 of the present invention.

Fig. 18 is a schematic perspective view of embodiment 12 of the present invention.

Fig. 19 is a schematic perspective view of embodiment 13 of the present invention.

Fig. 20 is a schematic perspective view of embodiment 14 of the present invention.

Fig. 21 is a schematic perspective view of embodiment 15 of the present invention.

Fig. 22 is a schematic perspective view of embodiment 16 of the present invention.

Fig. 23 is a schematic perspective view of embodiment 17 of the present invention.

Fig. 24 is a schematic perspective view of embodiment 18 of the present invention.

Fig. 25 is a schematic perspective view of embodiment 19 of the present invention.

Fig. 26 is a schematic perspective view of embodiment 20 of the present invention.

Fig. 27 is a schematic perspective view of embodiment 21 of the present invention.

Fig. 28 is a schematic perspective view of embodiment 22 of the present invention.

Fig. 29 is a schematic perspective view of embodiment 23 of the present invention.

Fig. 30 is a schematic perspective view of embodiment 24 of the present invention.

Fig. 31 is a schematic perspective view of embodiment 25 of the present invention.

Fig. 32 is a schematic perspective view of embodiment 26 of the present invention.

Fig. 33 is a schematic perspective view of embodiment 27 of the present invention.

Fig. 34 is a schematic perspective view of embodiment 28 of the present invention.

Fig. 35 is a schematic perspective view of embodiment 29 of the present invention.

Fig. 36 is a schematic perspective view of embodiment 30 of the present invention.

Fig. 37 is a schematic perspective view of embodiment 31 of the present invention.

Fig. 38 is a schematic perspective view of embodiment 32 of the present invention.

Fig. 39 is a schematic perspective view of embodiment 33 of the present invention.

Fig. 40 is a schematic perspective view of embodiment 34 of the present invention.

Fig. 41 is a schematic perspective view of embodiment 35 of the present invention.

Fig. 42 is a schematic perspective view of embodiment 36 of the present invention.

Fig. 43 is a schematic perspective view of embodiment 37 of the present invention.

Fig. 44 is a schematic perspective view of embodiment 38 of the present invention.

Fig. 45 is a schematic perspective view of embodiment 39 of the present invention.

Fig. 46 is a schematic perspective view of embodiment 40 of the present invention.

Fig. 47 is a schematic perspective view of embodiment 41 of the present invention.

Fig. 48 is a schematic perspective view of embodiment 42 of the present invention.

Fig. 49 is a schematic perspective view of embodiment 43 of the present invention.

Fig. 50 is a schematic perspective view of embodiment 44 of the present invention.

Fig. 51 is a schematic perspective view of embodiment 45 of the present invention.

Fig. 52 is a schematic perspective view of embodiment 46 of the present invention.

Fig. 53 is a schematic perspective view of embodiment 47 of the present invention.

Fig. 54 is a schematic perspective view of embodiment 48 of the present invention.

Fig. 55 is a schematic perspective view of embodiment 49 of the present invention.

Fig. 56 is a schematic perspective view of embodiment 50 of the present invention.

Fig. 57 is a schematic perspective view of embodiment 51 of the present invention.

Fig. 58 is a schematic perspective view of embodiment 52 of the present invention.

Fig. 59 is a schematic perspective view of embodiment 53 of the present invention.

Fig. 60 is a schematic perspective view of embodiment 54 of the present invention.

Fig. 61 is a schematic perspective view of embodiment 55 of the present invention.

Fig. 62 is a schematic perspective view of embodiment 56 of the present invention.

Fig. 63 is a schematic perspective view of embodiment 57 of the present invention.

Fig. 64 is a schematic perspective view of embodiment 58 of the present invention.

Fig. 65 is a schematic perspective view of embodiment 59 of the present invention.

Fig. 66 is a schematic perspective view of embodiment 60 of the present invention.

Fig. 67 is a schematic perspective view of embodiment 61 of the present invention.

Fig. 68 is a schematic perspective view of embodiment 62 of the present invention.

Fig. 69 is a schematic perspective view of embodiment 63 of the present invention.

Fig. 70 is a schematic perspective view of embodiment 64 of the present invention.

Fig. 71 is a schematic perspective view of embodiment 65 of the present invention.

Fig. 72 is a schematic perspective view of embodiment 66 of the present invention.

Fig. 73 is a schematic perspective view of embodiment 67 of the present invention.

Fig. 74 is a schematic perspective view of embodiment 68 of the present invention.

In the figure: the device comprises a pipe body-1, a head end-2, a tail end-3, a pipe wall-4, a pipe cavity-5, an optical fiber-6, an annular optical fiber-61, an optical fiber bend-7, a total reflection device-8, a reflector-9, a reflective film-10, a reflective film pipeline-11, a total reflection device pipeline-12, a reflector pipeline-13, a narrow gap-14, an optical fiber external connection line-15, a laser beam-16 and an optical fiber side hole-17.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1 to 15, a laser catheter includes a catheter body 1, the catheter body 1 includes a head end 2, a tail end 3, a catheter wall 4 and a catheter cavity 5, a plurality of optical fibers 6 distributed continuously or discontinuously are fixed in the catheter wall 4, and after the optical fibers 6 extend to a preset distance from the head end 2 in the catheter wall 4, a fiber bend 7, or a fiber side hole 17, or an annular optical fiber 61, or an optical reflection element, or a combination of the fiber bend 7, or the fiber side hole 17, or the annular optical fiber 61 and the optical reflection element is arranged to change a laser direction, so that the laser changes a cross section from a longitudinal axis direction of the catheter body 1 and then emits the laser to the catheter cavity 5, and further ablates a tissue entering the catheter cavity 5. Further, a plurality of optical fibers 6 are arranged continuously or discontinuously in a ring shape along the inner wall 4 of the tube body 1. The head end of the optical fiber 6 is one end extending to the head end 2 of the tube body 1, the width of the optical fiber side hole 17 is set to be 1-1000 micrometers, and the preset distance is greater than or equal to 0 millimeter.

Furthermore, the optical fiber 6 is connected with an external laser emitting device at the tail end of the tube body through an optical fiber external connection 15.

Furthermore, the tail end 3 of the tube body 1 is provided with an external interface, so that the tube cavity 5 can be connected with a negative pressure suction device. Ablation of tissue within lumen 5 by the catheter laser catheter of the present invention is performed by negative pressure moving the tissue into lumen 5 or by other means moving the target tissue into lumen 5.

By combining with monitoring technologies including but not limited to optical detection devices, acoustic detection devices and nuclear magnetic detection equipment, the position of the head end 2, the tissue structure around the head end 2 and the distance information between the head end 2 and the surrounding tissues are obtained, an operator sends the laser catheter to a target position through a blood vessel or other cavity according to the obtained information, or adjusts the position of the head end 2 in real time, then starts an external laser emitting device to emit laser, and selects or adjusts laser parameters including wavelength, frequency and energy density to ablate the tissues in the lumen 5.

The final direction of the laser after changing the direction is perpendicular to the longitudinal axis of the tube body, or the emitting direction of the laser is inclined towards the head end 2 or the tail end 3 of the tube body 1. Tip 2 in this example refers to the distal direction of the working end of the catheter, e.g. to the right in fig. 1, below in fig. 3. The approach of tilting towards the head end 2 enables the location of the ablation to be closer to the orifice. And the ablation effect at the focal point can be improved by focusing a plurality of lasers. While out of focus, non-target tissue damage can be avoided. The focal point includes focusing of 2, 3 or more laser beams, preferably no more than 3 laser beams, and also includes focusing of a beam at a relative position or focusing of a beam at an adjacent position.

Example 2:

based on the embodiment 1, it is preferable that, as shown in fig. 3, the optical fiber 6 extends to a predetermined distance from the head end 2 through the inside of the tube wall to form an optical fiber bend 7, the end face of the optical fiber bend 7 faces the lumen 5, and the laser light changes direction through the optical fiber bend 7 and then emits into the lumen 5.

Example 3:

based on the embodiment 1, it is preferable that, as shown in fig. 4 and 5, the optical fiber 6 extends through the tube wall to a predetermined distance from the head end 2 to be provided with the total reflection device 8, and the total reflection device 8 is composed of three elements of an optical dense matter and an optical sparse matter constituting a reflection interface and an incidence angle greater than or equal to a critical angle. After being transmitted to the head end through the optical fiber 6, the laser is totally reflected through the total reflection device 8, so that the laser is changed from the longitudinal axis direction of the tube body 1 to the cross section radial direction and then is emitted to the tube cavity 5;

furthermore, the reflecting interfaces of the total reflection device 8 are arranged into two or more interfaces, and the two or more interfaces are sequentially arranged at an angle, so that the laser is sequentially subjected to two or more times of total reflection on the reflecting interfaces, and the laser is changed from the longitudinal axial direction of the tube body 1 to the cross section radial direction and then is emitted to the tube cavity 5.

Example 4:

based on the embodiment 1, a preferred scheme is that in fig. 6, a reflecting mirror 9 is arranged at the position where the optical fiber 6 extends to the preset distance from the head end 2 in the pipe wall, and the reflecting mirror 9 is coated with metal including but not limited to silver, aluminum or copper by optical glass, metal and silicon carbide material; or a compound including, but not limited to, silver, aluminum, or copper metal material. After being transmitted to the head end 2 through the optical fiber 6, the laser is reflected through the reflector 9, so that the laser is changed from the longitudinal axial direction of the tube body 1 to the radial direction of the cross section and then is emitted to the tube cavity 5.

Example 5:

on the basis of the embodiment 1, as shown in fig. 12 to 13, in a preferable scheme, an annular pipeline which is shaped along the radial direction of the conduit is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the inner wall of the pipe wall 4, a reflector 9 is arranged on the inner wall of the annular pipeline to form a reflector pipeline 13, a narrow gap 14 is arranged in the direction of the reflector pipeline 13 facing the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1, and the head end of the optical fiber 6 is connected with the reflector pipeline 13; after the laser is transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, the optical fiber 6 transmits the laser into the reflector pipe 13, and the laser is reflected by the reflector pipe 13 and then is emitted to the pipe cavity 5 through the narrow gap 14; the optical fibers 6 arranged in the tube wall 4 are one or more, and the width of the narrow gap is set to be 1-1000 microns.

Example 6:

in addition to embodiment 1, it is preferable that, as shown in fig. 7, a reflective film 10 is disposed at a predetermined distance from the head end 2 through the optical fiber 6 extending inside the tube wall 4, the reflective film 10 is a crystal structure formed by dielectric materials with different refractive indexes periodically arranged in space, and the crystal structure further forms a film structure, so that the light incident to the film structure is totally reflected. The laser light is transmitted to the reflecting film 10 through the optical fiber 6 and reflected by the reflecting film, so that the laser light is emitted to the lumen 5 after changing the longitudinal axial direction of the tube body 1 into the cross-sectional radial direction.

Example 7:

on the basis of the embodiment 1, as shown in fig. 7 and 14, preferably, an annular pipeline running along the radial direction of the tube body 1 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, a reflective film 10 is arranged on the inner wall of the annular pipeline to form a reflective film pipeline 11, a narrow gap 14 is arranged in the direction of the reflective film pipeline 11 towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1, and the end of the optical fiber 6 is connected with the reflective film pipeline 11; the laser is transmitted into the reflecting film pipeline 11 through the optical fiber 6, and is reflected in the reflecting film pipeline 11 to change the direction and then is emitted to the tube cavity 5 from the narrow gap 14; the optical fiber 6 for transmitting laser in the pipe wall 4 and guiding the laser into the reflecting film pipeline 11 is set to be one or more, and the width of the narrow gap is set to be 1-1000 micrometers.

Example 8:

on the basis of the embodiment 1, as shown in fig. 9 to 11, in a preferable scheme, an annular pipeline which is shaped along the radial direction of a conduit is arranged at a preset distance from the head end 2 to the optical fiber 6 extending through the pipe wall 4, a total reflection device 8 is arranged in the annular pipeline to form a total reflection device pipeline 12, a narrow gap 14 is arranged in the direction of the total reflection device pipeline 12 facing the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1, and the end of the optical fiber 6 is connected with the total reflection device pipeline 12; after the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the optical fiber 6 transmits the laser into the total reflection device pipeline 12, the laser generates total reflection in a total reflection device 8 in the total reflection device pipeline 12, the direction of the laser is changed, and the laser is emitted to the tube cavity 5 through the narrow gap 14;

the laser fibers 6 arranged in the tube wall 4 are one or more, and the width of the narrow gap is set to be 1-1000 microns.

Example 9:

based on the embodiment 1, as shown in fig. 15, it is preferable that the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, and then a side hole is formed in the direction of the optical fiber 6 toward the tube cavity 5 to form an optical fiber side hole 17, the end of the optical fiber is sealed by a total reflection optical element, and the laser is transmitted to the laser head end 2 through the optical fiber 6 and then emitted to the tube cavity 5 through the optical fiber side hole 17. The width of the optical fiber side hole is set to be 1-1000 micrometers.

Example 10:

on the basis of the embodiment 1, as shown in fig. 9 to 11 and fig. 16, preferably, the optical fiber 6 extends to a position away from the head end 2 through the tube wall 4 to a predetermined distance, an optical fiber bend 7 is arranged, a reflective device tube 12 is arranged after the optical fiber bend 7, and a slit 14 is arranged in the direction of the total reflective device tube 12 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body; the laser is transmitted into the total reflection device pipeline 12 through the optical fiber bending 7, and then is emitted to the tube cavity 5 from the narrow gap 14 after the direction of the laser is changed through the total reflection device pipeline 12. The laser fibers 6 arranged in the tube wall 4 are arranged into one or more than one.

Example 11:

based on the embodiment 1, as shown in fig. 6, 12 to 13 and 17, it is preferable that the optical fiber 6 is provided with a fiber bend 7 extending to a predetermined distance from the head end 2 through the inside of the tube wall, a mirror duct 13 is provided after the fiber bend 7, a slit 14 is provided in a direction of the mirror duct 13 toward the lumen 5 and perpendicular to the longitudinal axis of the tube body 1, the laser light is transmitted into the mirror duct 13 through the fiber bend 7, and the laser light is emitted to the lumen 5 from the slit 14 after the direction of the mirror duct 13 is changed; the optical fiber 6 for transmitting laser light arranged in the pipe wall 4 is provided as one or more.

Example 12:

on the basis of the embodiment 1, as shown in fig. 6, 9 to 11 and 18, a reflector 9 is disposed at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, a total reflection device tube 12 is disposed behind the reflector 9, and a slit 14 is disposed in the total reflection device tube 12 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 of the tube body 1 through the optical fiber 6, the laser is changed in direction through the reflector 9 and the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14;

the optical fiber 6 arranged in the tube wall 4 for transmitting laser is arranged into one or more than one.

Example 13:

based on the embodiment 1, as shown in fig. 6, 12-13 and 19, the optical fiber 6 is provided with a reflector 9 extending to a preset distance from the catheter head end 2 through the tube wall, a reflector duct 13 is arranged behind the reflector 9, and a slit 14 is arranged in the reflector duct 13 in the direction of the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the reflector 9 at the head end of the catheter through the optical fiber 6, enters the reflector pipeline 13 after being reflected by the reflector 9, and is reflected by the reflector pipeline 13 and then is emitted to the lumen 5 through the narrow gap 14;

Example 14:

on the basis of the embodiment 1, as shown in fig. 3 to 5 and fig. 20, it is preferable that the optical fiber 6 extends to a position away from the head end 2 through the tube wall 4 and is provided with an optical fiber bend 7, and a total reflection device 8 is arranged after the optical fiber bend 7;

after the direction of the laser is changed by bending the optical fiber 7, the laser irradiates to a total reflection device 8 to further change the direction, so that the laser is irradiated to the tube cavity 5 after the longitudinal axis direction of the tube body 1 is changed into the cross section radial direction.

Example 15:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 9 to 11 and 21, a preferable scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 of the catheter through the inside of the catheter wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a total reflection device pipeline 12 is arranged after the total reflection device 8, and a slit (14) is arranged in the direction of the total reflection device pipeline 12 towards the catheter cavity 5 and perpendicular to the longitudinal axis of the catheter;

after being transmitted to the head end 2 of the tube body 1 through the optical fiber in the tube wall, the laser changes direction through the optical fiber bend 7, the total reflection device 8 and the total reflection device pipeline 12 in sequence and finally emits to the tube cavity 5 through the narrow gap 14 of the total reflection device pipeline 12;

Example 16:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 12 to 13 and 22, it is preferable that the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4 to form an optical fiber bend 7, a total reflection device 8 is disposed after the optical fiber bend 7, a mirror duct 13 is disposed after the total reflection device 8, and a slit 14 is disposed in a direction of the mirror duct 13 toward the tube cavity 5 and perpendicular to the longitudinal axis of the catheter;

the laser is transmitted to the catheter head end 2 through the optical fiber in the catheter wall 4, and then is emitted to the catheter cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the total reflection device 8 and the reflector pipeline 13.

Example 17:

based on the embodiment 1, a preferable scheme is as shown in fig. 3, fig. 6 and fig. 23, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is provided with an optical fiber bend 7, and a reflector 9 is arranged after the optical fiber bend 7;

after the laser is transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser changes direction through the optical fiber bending 7 and the reflector 9 in sequence, and finally the laser is changed from the longitudinal axis direction of the catheter body 1 to the radial direction of the cross section and then is shot to the catheter cavity 5.

Example 18:

on the basis of the embodiment 1, as shown in fig. 3, 6, 9-11 and 24, a preferable scheme is that the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4 to be provided with an optical fiber bend 7, a reflector 9 is arranged after the optical fiber bend 7, a total reflection device pipeline 12 is arranged after the reflector 9, and a slit 14 is arranged in the total reflection device pipeline 12 towards the direction of the tube cavity 5 and perpendicular to the longitudinal axis of the catheter;

after being transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser sequentially changes directions through the optical fiber bending 7, the reflector 9 and the total reflection device pipeline 12, and then is emitted to the catheter cavity 5 through the narrow gap 14 of the total reflection device pipeline 12.

Example 19:

on the basis of the embodiment 1, a preferable scheme is as shown in fig. 3, fig. 6, fig. 12 to fig. 13 and fig. 25, the optical fiber 6 is provided with an optical fiber bend 7 extending to a preset distance from the head end 2 through the pipe wall 4, a reflector 9 is arranged after the optical fiber bend 7, a reflector pipe 13 is arranged after the reflector 9, and a slit 14 is arranged in the reflector pipe 13 towards the direction of the pipe cavity 5 and perpendicular to the longitudinal axis of the catheter;

after being transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser sequentially changes directions gradually through the optical fiber bending 7, the reflector 9 and the reflector pipeline 13, and finally is emitted to the catheter cavity 5 through the narrow gap 14 of the reflector pipeline 13.

Example 20:

based on the embodiment 1, as shown in fig. 3, 7 and 26, the optical fiber 6 extends through the tube wall 4 to a preset distance from the head end 2, and the optical fiber bend 7 is arranged, and the reflective film 10 is arranged after the optical fiber bend 7;

after the laser changes direction through the optical fiber bending 7, the laser is reflected by the reflecting film 10 to change the direction into the cross section diameter of the tube body 1 and then is shot to the tube cavity 5.

Example 21:

on the basis of the embodiment 1, as shown in fig. 3, 7, 9 to 11 and 27, it is preferable that the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4 to form an optical fiber bend 7, a reflective film 10 is disposed after the optical fiber bend 7, a total reflection device tube 12 is disposed behind the reflective film 10, and a slit 14 is disposed in the total reflection device tube 12 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the catheter;

after the laser is transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser gradually changes direction through the optical fiber bending 7, the reflecting film 10 and the total reflection device pipeline 12 in sequence, and the laser is emitted to the catheter cavity 5 after the longitudinal axis direction of the catheter body 1 is changed into the cross section radial direction.

Example 22:

based on the embodiment 1, as shown in fig. 3, 7, 12 to 13 and 28, the optical fiber 6 is provided with an optical fiber bend 7 extending to a predetermined distance from the head end 2 through the tube wall 4, a reflective film 10 is provided after the optical fiber bend 7, a mirror tube 13 is provided behind the reflective film 10, and a slit 14 is provided in the mirror tube 13 in a direction toward the lumen 5 and perpendicular to the longitudinal axis of the catheter;

after the laser is transmitted to the head end 2 through the optical fiber arranged in the tube wall, the laser gradually changes direction through the optical fiber bending 7, the reflecting film 10 and the reflector pipeline 13 in sequence and is emitted to the tube cavity 5 through the narrow gap 14.

Example 23:

based on the embodiment 1, as shown in fig. 7 to 8, 14 and 29, the optical fiber 6 is provided with an optical fiber bend 7 extending to a preset distance from the head end 2 through the tube wall 4, a reflective film tube 11 is provided after the optical fiber bend 7, and a slit 14 is provided in the reflective film tube 11 in the direction of the lumen 5 and perpendicular to the longitudinal axis of the catheter;

the laser changes direction through the optical fiber bending 7, and then is reflected by the reflecting film in the reflecting film pipeline 11 and then is emitted to the tube cavity 5 through the narrow gap 14.

Example 24:

on the basis of the embodiment 1, as shown in fig. 4 to 6 and 30, it is preferable that the optical fiber 6 extends to a position having a predetermined distance from the head end 2 through the inside of the tube wall to be provided with a total reflection device 8, and a reflector 9 is arranged behind the total reflection device 8;

after the laser is transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the total reflection device 8 and the reflector 9 change directions in sequence and then shoot towards the catheter cavity 5.

Or, the optical fiber 6 extends to the pipe wall 4 at the preset distance from the catheter head end 2 through the pipe wall, the reflector 9 and the total reflection device 8 are sequentially arranged in the pipe wall, and the laser gradually changes the direction through the reflector 9 and the total reflection device 8 and then emits to the pipe cavity 5.

Example 25:

on the basis of embodiment 1, a preferable scheme is as shown in fig. 4 to 6, fig. 9 to 11 and fig. 31, the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4 and is provided with a total reflection device 8, a reflector 9 is arranged behind the total reflection device 8, a total reflection device pipeline 12 is arranged behind the reflector 9, and a slit 14 is arranged in the total reflection device pipeline 12 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the catheter:

after being transmitted to the head end 2 of the tube body through the optical fiber arranged in the tube wall, the laser is sequentially changed in direction through the total reflection device 8, the reflector 9 and the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14;

or, a reflector 9, a total reflection device 8 and a total reflection device pipeline 12 are sequentially arranged in the tube wall 4 of the head end 2 of the laser catheter and behind the laser fiber 6, the direction of the laser is gradually changed through the reflector 9, the total reflection device 8 and the total reflection device pipeline 12, and finally the laser is changed from the longitudinal axis direction of the tube body 1 to the cross section radial direction and then is shot to the tube cavity 5 through the narrow gap 14.

Example 26:

on the basis of the embodiment 1, as shown in fig. 4 to 6, 12 to 13 and 32, a reflecting device 8 is disposed at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, a mirror 9 is disposed behind the total reflecting device 8, a mirror duct 13 is disposed behind the mirror 9, and a slit 14 is disposed in the mirror duct 13 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber arranged in the tube wall, the laser is sequentially changed in direction through the total reflection device 8, the reflector 9 and the reflector pipeline 13 and then is emitted to the tube cavity 5 through the narrow gap 14;

or, the reflector 9, the total reflection device 8 and the reflector pipeline 13 are arranged in sequence, and the laser is gradually changed in direction through the reflector 9, the total reflection device 8 and the reflector pipeline 13 and then is emitted to the tube cavity 5 through the narrow gap 14.

Example 27:

on the basis of embodiment 1, a preferable scheme is as shown in fig. 4 to 8, 14 and 33, a total reflection device 8 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the inside of the tube wall 4, a reflector 9 is arranged behind the total reflection device 8, a reflective film tube 11 is arranged behind the reflector 9, and a slit 14 is arranged in the reflective film tube 11 in the direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after the laser is transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall 4, the laser is reflected by the total reflection device 8 and the reflector 9 in sequence and reflected in the reflective film pipeline 11 to change the direction gradually, and finally the laser is emitted to the catheter cavity 5 through the narrow gap 14;

or, a reflector 9, a total reflection device 8 and a reflective film pipeline 11 are sequentially arranged at a preset distance from the optical fiber 6 extending to the catheter head end 2 through the catheter wall 4, and the laser is transmitted through the optical fiber 6, then sequentially changes direction through the reflector 9, the total reflection device 8 and the reflective film pipeline 11, and finally is emitted to the catheter cavity 5 through the narrow gap 14.

Example 28:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 7 and 34, it is preferable that the optical fiber 6 extends to a position away from the head end 2 through the tube wall 4 and is provided with a total reflection device 8, and a reflective film 10 is arranged behind the total reflection device 8;

after being transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser changes the direction through the total reflection device 8 and the reflection film 10 in sequence, so that the laser is emitted to the catheter cavity 5 after changing the longitudinal axis direction of the catheter body 1 into the cross section radial direction.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with the reflecting film 10 and the total reflection device 8, and after the laser is transmitted to the head end 2 of the catheter through the optical fiber arranged in the pipe wall, the laser is changed into the cross section of the pipe body 1 through the reflecting film 10 and the total reflection device 8 in sequence and then is emitted to the pipe cavity 5 after the cross section is radial.

Example 29:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 7, 9 to 11, and 35, it is preferable that the optical fiber 6 extends to a position away from the head end 2 through the tube wall 4 and is provided with a total reflection device 8, and a reflective film 10 is arranged behind the total reflection device 8; a total reflection device pipeline 12 is arranged behind the reflection film 10, and a narrow gap 14 is arranged in the total reflection device pipeline 12 in the direction towards the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall, then sequentially changes the direction through the total reflection device 8 and the reflection film 10, then shoots to the total reflection device pipeline 12, and shoots to the tube cavity 5 through the narrow gap 14 after being reflected by the total reflection device pipeline 12.

Or, a reflecting film 10, a total reflection device 8 and a total reflection device pipeline 12 are sequentially arranged at a preset distance from the optical fiber 6 extending to the head end 2 through the pipe wall 4; after being transmitted to the catheter head end 2 through the optical fiber arranged in the catheter wall, the laser sequentially passes through the reflecting film 10, the total reflection device 8 and the total reflection device pipeline 12, changes the direction and then is emitted to the catheter cavity 5 through the narrow gap 14.

Example 30:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 7, 12 to 13 and 36, a preferable scheme is that the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4 and is provided with a total reflection device 8, a reflection film 10 is arranged behind the total reflection device 8, a mirror duct 13 is arranged behind the reflection film 10, and a slit 14 is arranged in the mirror duct 13 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the catheter;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction of the laser is changed through the total reflection device 8, the reflection film 10 and the reflector tube 13 in sequence.

Or, a reflecting film 10, a total reflection device 8 and a reflecting mirror pipeline 13 are sequentially arranged at a preset distance from the head end 2 to the optical fiber 6 extending through the pipe wall 4, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the direction of the laser is changed sequentially through the reflecting film 10, the total reflection device 8 and the reflecting mirror pipeline 13, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14. The optical fiber 6 arranged in the tube wall 4 for transmitting laser is arranged into one or more than one.

Example 31:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 7 to 8, 14 and 37, it is preferable that a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflective film tube 11 is disposed behind the total reflection device 8, and a slit 14 is disposed in the reflective film tube 11 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is reflected by the total reflection device 8, the direction of the reflection film pipeline 11 is gradually changed, and the laser is emitted to the tube cavity 5 through the narrow gap 14.

Example 32:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 9 to 11 and 38, a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a total reflection device pipeline 12 is disposed behind the total reflection device 8, and a slit 14 is disposed in the total reflection device pipeline 12 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 from the narrow gap 14 after the direction of the laser is changed through the total reflection device 8 and the total reflection device pipeline 12 in sequence.

Example 33:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 12 to 13 and 39, preferably, a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a mirror duct 13 is disposed behind the total reflection device 8, and a slit 14 is disposed in the mirror duct 13 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed through the total reflection device 8 and the reflector tube 13 in sequence.

Example 34:

on the basis of the embodiment 1, as shown in fig. 6 to 7 and fig. 40, a reflector 9 is disposed at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, and a reflective film 10 is disposed behind the reflector 9;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser changes direction through the reflector 9 and the reflecting film 10 in sequence, so that the laser is changed from the longitudinal axis direction of the tube body 1 to the radial direction of the cross section and then shoots to the tube cavity 5.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, the reflecting film 10 and the reflecting mirror 9 are sequentially arranged, and after the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser gradually changes direction to the cross section of the tube body 1 through the reflecting film 10 and the reflecting mirror 9 and then is shot to the tube cavity 5.

Example 35:

on the basis of the embodiment 1, as shown in fig. 6 to 7, 9 to 11 and 41, a preferable scheme is that a reflector 9 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, a reflective film 10 is arranged behind the reflector 9, a total reflection device pipeline 12 is arranged behind the reflective film 10, and a slit 14 is arranged in the total reflection device pipeline 12 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber arranged in the tube wall, the laser sequentially passes through the reflector 9, the reflecting film 10 and the total reflection device pipeline 12, the direction of the laser is gradually changed, and then the laser is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the reflecting film 10, the reflecting mirror 9 and the total reflection device pipeline 12 are sequentially arranged, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the direction of the laser is gradually changed through the reflecting film 10, the reflecting mirror 9 and the total reflection device pipeline 12 in sequence, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

Example 36:

based on the embodiment 1, as shown in fig. 6 to 7, 12 to 13 and 42, it is preferable that a reflector 9 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflective film 10 is disposed behind the reflector 9, a reflector duct 13 is disposed behind the reflective film 10, and a slit 14 is disposed in the reflector duct 13 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber arranged in the tube wall, and then is gradually changed in direction through the reflector 9, the reflecting film 10 and the reflector pipeline 13 in sequence and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the reflecting film 10, the reflecting mirror 9 and the reflecting mirror pipeline 13 are sequentially arranged, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the laser gradually changes direction through the reflecting film 10, the reflecting mirror 9 and the reflecting mirror pipeline 13 and is shot to the pipe cavity 5 through the narrow gap 14.

Example 37:

based on the embodiment 1, as shown in fig. 6 to 8, 14 and 43, it is preferable that a reflector 9 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflective film tube 11 is disposed behind the reflector 9, and a slit 14 is disposed in the reflective film tube 11 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 of the laser catheter through the optical fiber 6 arranged in the catheter wall, and then is emitted to the lumen 5 through the narrow gap 14 after changing the direction through the reflector 9 and the film emitting pipeline 11 in sequence.

Example 38:

on the basis of the embodiment 1, as shown in fig. 7, 9 to 11 and 44, it is preferable that a reflective film 10 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a total reflection device tube 12 is disposed behind the reflective film 10, and a slit 14 is disposed in the total reflection device tube 12 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction of the laser is changed through the reflecting film 10 and the total reflection device tube 12 in sequence.

Example 39:

in addition to the embodiment 1, as shown in fig. 7, fig. 12 to 13 and fig. 45, it is preferable that a reflective film 10 is provided in the optical fiber 6 extending to a predetermined distance from the head end 2 through the tube wall, a mirror duct 13 is provided behind the reflective film 10, and a slit 14 is provided in the mirror duct 13 in a direction toward the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall, and then is sequentially changed in direction through the reflecting film 10 and the reflector tube 13 and then is emitted to the tube cavity 5 through the narrow gap 14.

Example 40:

in addition to the embodiment 1, as shown in fig. 7 to 8, 14 and 46, it is preferable that a reflective film 10 is disposed at a predetermined distance from the head end 2 of the optical fiber 6 extending through the tube wall 4, a reflective film duct 11 is disposed behind the reflective film 10, and a slit 14 is disposed in the reflective film duct 11 toward the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction of the laser is changed through the reflecting film 10 and the reflecting film pipeline 11 in sequence.

Example 41:

on the basis of the embodiment 1, as shown in fig. 3 to 6 and 47, it is preferable that the optical fiber 6 is provided with an optical fiber bend 7 at a position extending to a predetermined distance from the head end 2 through the tube wall 4, a total reflection device 8 is provided after the optical fiber bend 7, and a reflector 9 is provided after the total reflection device 8;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser is gradually changed in direction to be the cross section of the tube body 1 and then is emitted to the tube cavity 5 after being bent 7, the total reflection device 8 and the reflector 9.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bend 7, a reflector 9 and a total reflection device 8, and after the laser is transmitted to the head end 2 of the pipe body through the optical fiber arranged in the pipe wall, the direction of the laser is gradually changed to be that the cross section of the pipe body 1 is radially directed to the pipe cavity 5 through the optical fiber bend 7, the reflector 9 and the total reflection device 8.

Example 42:

on the basis of the embodiment 1, as shown in fig. 3 to 6, 9 to 11 and 48, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflector 9 is arranged after the total reflection device 8, a total reflection device pipeline 12 is arranged after the reflector 9, and a narrow gap 14 is arranged in the total reflection device pipeline 12 towards the direction of the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser is sequentially changed in direction through the optical fiber bending 7, the total reflection device 8, the reflector 9 and the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bend 7, a reflector 9, a total reflection device 8 and a total reflection device pipeline 12, and the laser is sequentially changed in direction through the optical fiber bend 7, the reflector 9 and the total reflection device pipeline 12 and then is emitted to the pipe cavity 5 through the narrow gap 14.

Example 43:

on the basis of the embodiment 1, as shown in fig. 3 to 6, 12 to 13 and 49, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflector 9 is arranged after the total reflection device 8, a reflector pipeline 13 is arranged after the reflector 9, and a narrow gap 14 is arranged in the reflector pipeline 13 towards the direction of the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the total reflection device 8, the reflector 9 and the reflector pipeline 13.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bend 7, a reflector 9, a total reflection device 8 and a reflector pipeline 13, the laser changes direction through the optical fiber bend 7, the reflector 9 and the reflector pipeline 13 in sequence, and finally the laser is emitted to the pipe cavity 5 through a narrow gap 14 of the reflector pipeline 13.

Example 44:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 7 and 50, it is preferable that an optical fiber bend 7 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the inside of the tube wall 4, a total reflection device 8 is disposed after the optical fiber bend 7, and a reflective film 10 is disposed after the total reflection device 8;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall, the laser gradually changes direction through the optical fiber bending 7, the total reflection device 8 and the reflection film 10 in sequence, so that the laser is emitted to the tube cavity 5 after changing the longitudinal axis direction of the tube body 1 into the radial cross section direction.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, and the optical fiber bend 7, the reflective film 10 and the total reflection device 8 are sequentially arranged, so that the laser is changed into the cross section of the pipe body 1 in the radial direction through the optical fiber bend 7, the reflective film 10 and the total reflection device 8 in sequence and then is emitted to the pipe cavity 5.

Example 45:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 7, 9 to 11 and 51, it is preferable that the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4 to form an optical fiber bend 7, the total reflection device 8 is disposed after the optical fiber bend 7, the reflective film 10 is disposed after the total reflection device 8, the total reflection device duct 12 is disposed after the reflective film 10, and the slit 14 is disposed in the total reflection device duct 12 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser is sequentially changed in direction through the optical fiber bending 7, the total reflection device 8, the reflection film 10 and the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bend 7, a reflecting film 10, a total reflection device 8 and a total reflection device channel 12, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the direction of the laser is changed through the optical fiber bend 7, the reflecting film 10, the total reflection device 8 and the total reflection device channel 12 in sequence and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

Example 46:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 7, 12 to 13 and 52, a preferred scheme is that an optical fiber bend 7 is arranged at a position where an optical fiber 6 extends to a preset distance from the head end 2 through the inside of a tube wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflection film 10 is arranged after the total reflection device 8, a reflector duct 13 is arranged after the reflection film 10, and a narrow gap 14 is arranged in the reflector duct 13 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser sequentially passes through the optical fiber bend 7, the total reflection device 8, the reflection film 10 and the reflector tube 13 to change the direction and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bend 7, a reflecting film 10, a total reflection device 8 and a reflector pipeline 13, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the laser is sequentially changed in direction through the optical fiber bend 7, the reflecting film 10, the total reflection device 8 and the reflector pipeline 13 and then is emitted to the pipe cavity 5 through the narrow gap 14.

Example 47:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 7 and 53, it is preferable that a fiber bend 7 is provided at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the inside of the tube wall 4, a mirror 9 is provided after the fiber bend 7, and a reflective film 10 is provided after the mirror 9;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser sequentially changes the direction into the cross section of the tube body 1 through the optical fiber bending 7, the reflector 9 and the reflecting film 10 and then shoots towards the tube cavity 5.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4 and is sequentially provided with an optical fiber bending 7, a reflecting film 10 and a reflecting mirror 9, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the laser is changed in direction through the optical fiber bending 7, the reflecting film 10 and the reflecting mirror 9 in sequence and then is emitted to the pipe cavity 5 after being radially distributed on the cross section of the pipe body 1.

Example 48:

on the basis of the embodiment 1, as shown in fig. 3, 6 to 7, 9 to 11 and 54, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, a reflector 9 is arranged after the optical fiber bend 7, a reflecting film 10 is arranged behind the reflector 9, a total reflection device pipe 12 is arranged behind the reflecting film 10, and a narrow gap 14 is arranged in the total reflection device pipe 12 towards the direction of the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the reflector 9, the reflecting film 10 and the total reflection device pipeline 12.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the optical fiber bend 7, the reflective film 10, the reflector 9 and the total reflection device pipe 12 are sequentially arranged, and after the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the pipe wall 4, the direction of the laser is changed through the optical fiber bend 7, the reflective film 10, the reflector 9 and the total reflection device pipe 12 in sequence, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

Example 49:

based on the embodiment 1, as shown in fig. 3, 6 to 7, 12 to 13 and 55, it is preferable that the optical fiber 6 is provided with a fiber bend 7 extending through the tube wall 4 to a predetermined distance from the head end 2, a reflector 9 is provided after the fiber bend 7, a reflective film 10 is provided after the reflector 9, a reflector duct 13 is provided after the reflective film 10, and a slit 14 is provided in the reflector duct 13 in a direction toward the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the reflector 9, the reflecting film 10 and the reflector pipeline 13.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the optical fiber bend 7, the reflective film 10, the reflector 9 and the reflector pipeline 13 are sequentially arranged, and after the laser is transmitted to the head end 2 through the optical fiber in the pipe wall 4, the direction of the laser is changed through the optical fiber bend 7, the reflective film 10, the reflector 9 and the reflector pipeline 13 sequentially, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

Example 50:

based on the embodiment 1, as shown in fig. 3, 6 to 8, 14 and 56, a fiber bend 7 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a mirror 9 is disposed after the fiber bend 7, a reflective membrane tube 11 is disposed after the mirror 9, and a slit 14 is disposed in the reflective membrane tube 11 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the reflector 9 and the reflective film pipeline 11.

Example 51:

on the basis of the embodiment 1, as shown in fig. 4 to 5, 7 to 8, 14 and 57, it is preferable that a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflection film 10 is disposed behind the total reflection device 8, a reflection film duct 11 is disposed behind the reflection film 10, and a slit 14 is disposed in the reflection film duct 11 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, the laser sequentially changes the direction through the total reflection device 8, the reflection film 10 and the reflection film pipeline 11 and then is emitted to the pipe cavity 5 through the narrow gap 14.

Or, the reflecting film 10, the total reflection device 8 and the reflecting film pipeline 11 are sequentially arranged at the position where the optical fiber 6 extends to the preset distance from the head end 2 through the pipe wall 4, and after the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the pipe wall, the direction of the laser is changed sequentially through the reflecting film 10, the total reflection device 8 and the reflecting film pipeline 11, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

One or more optical fibers 6 for transmitting laser light are arranged in the pipe wall 4.

Example 52:

on the basis of embodiment 1, as shown in fig. 4 to 7 and fig. 58, it is preferable that a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflecting mirror 9 is disposed behind the total reflection device 8, and a reflecting film 10 is disposed behind the reflecting mirror 9;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall, the laser is reflected by the total reflection device 8, the reflector 9 and the reflection film 10 in sequence, changes the direction into the cross section of the tube body 1, and then emits to the tube cavity 5.

Or, the three optical elements are arranged in the tube wall 4 in the order that the total reflection device 8, the reflector 9 and the reflection film 10 extend to the preset distance from the head end 2 in the tube wall 4 of the optical fiber 6, and the laser changes the laser direction in sequence through any one of the optical elements arranged in the arrangement mode, so that the laser is emitted to the tube cavity 5 after changing the longitudinal axis direction of the tube body 1 into the cross section radial direction.

Example 53:

on the basis of the embodiment 1, as shown in fig. 4 to 7, 9 to 11, and 59, it is preferable that a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflector 9 is disposed behind the total reflection device 8, a reflective film 10 is disposed behind the reflector 9, a total reflection device duct 12 is disposed behind the reflective film 10, and a slit 14 is disposed in the total reflection device duct 12 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser is sequentially changed in direction through the total reflection device 8, the reflector 9, the reflection film 10 and the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the total reflection device 8, the reflector 9 and the reflective film 10 are arranged in any sequence, a total reflection device pipeline 12 is arranged behind the total reflection device, the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the pipe wall 4, the direction of the laser is sequentially changed by any optical element arranged in any arrangement mode, the laser is emitted to the total reflection device pipeline 12, and the laser is emitted to the pipe cavity 5 through the narrow gap 14 after being totally reflected by the total reflection device 8 in the total reflection device pipeline 12.

Example 54:

on the basis of the embodiment 1, as shown in fig. 4 to 7, 12 to 13 and 60, it is preferable that a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflector 9 is disposed behind the total reflection device 8, a reflective film 10 is disposed behind the reflector 9, a reflector duct 13 is disposed behind the reflective film 10, and a slit 14 is disposed in the reflector duct 13 in a direction toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser is sequentially changed in direction through the total reflection device 8, the reflector 9, the reflection film 10 and the reflector pipeline 13 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to the pipe wall 4 at the preset distance from the head end 2 through the pipe wall 4, the total reflection device 8, the reflector 9 and the reflective film 10 are arranged in any sequence, the reflector pipeline 13 is arranged behind the total reflection device, the laser is transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, the direction of the laser is sequentially changed by any optical element arranged in any arrangement mode, the laser is emitted to the reflector pipeline 13, and the laser is emitted to the pipe cavity 5 through the narrow gap 14 after being reflected by the reflector pipeline 13.

Example 55:

based on the embodiment 1, as shown in fig. 3, 7 to 8 and 61, it is preferable that the optical fiber 6 is provided with an optical fiber bend 7 extending through the tube wall 4 to a predetermined distance from the head end 2, a reflective film 10 is provided after the optical fiber bend 7, a reflective film duct 11 is provided after the reflective film 10, and a slit 14 is provided in the reflective film duct 11 toward the lumen 5 and perpendicular to the longitudinal axis of the tube 1;

the laser is transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, and then is emitted to the pipe cavity 5 through the narrow gap 14 after the direction of the laser is changed through the optical fiber bending 7, the reflecting film 10 and the reflecting film pipeline 11 in sequence.

Example 56:

in addition to the embodiment 1, as shown in fig. 6 to 8, 14 and 62, it is preferable that a reflecting mirror 9 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflecting film 10 is disposed behind the reflecting mirror 9, a reflecting film duct 11 is disposed behind the reflecting film 10, and a slit 14 is disposed in the reflecting film duct 11 in a direction toward the tube cavity 5;

the laser is transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, and then is emitted to the pipe cavity 5 through the narrow gap 14 after the direction is changed through the reflector 9, the reflecting film 10 and the reflecting film pipeline 11 in sequence.

Or, the optical fiber 6 extends to the pipe wall 4 at a preset distance from the head end 2 through the pipe wall 4, the reflecting film 10, the reflecting mirror 9 and the reflecting film pipeline 11 are sequentially arranged in the pipe wall 4, and after the laser is transmitted to the head end 2 through the optical fiber arranged in the pipe wall, the direction of the laser is changed sequentially through the reflecting film 10, the reflecting mirror 9 and the reflecting film pipeline 11, and then the laser is emitted to the pipe cavity 5 through the narrow gap 14.

Example 57:

on the basis of the embodiment 1, as shown in fig. 3, 4 to 5, 14 and 63, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the inside of the tube wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflective film tube 11 is arranged after the total reflection device 8, and a slit 14 is arranged in the reflective film tube 11 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the total reflection device 8 and the reflection film pipeline 11.

Example 58:

on the basis of embodiment 1, as shown in fig. 3 to 7 and fig. 64, it is preferable that an optical fiber bend 7 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a total reflection device 8 is disposed after the optical fiber bend 7, a reflector 9 is disposed after the total reflection device 8, and a reflective film 10 is disposed after the reflector 9;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser sequentially changes the direction into the cross section of the tube body 1 through the optical fiber bending 7, the total reflection device 8, the reflector 9 and the reflection film 10 and then shoots to the tube cavity 5.

Or the total reflection device 8, the reflector 9 and the reflection film 10 are arranged in random arrangement after the head end 2 of the catheter and the optical fiber are bent 7, and the laser sequentially changes directions in any combination mode and then emits to the lumen 5.

Example 59:

on the basis of the embodiment 1, as shown in fig. 3 to 7, 9, 10 to 11 and 65, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflector 9 is arranged after the total reflection device 8, a reflective film 10 is arranged after the reflector 9, a total reflection device pipe 12 is arranged after the reflective film 10, and a slit 14 is arranged in the total reflection device pipe 12 in the direction towards the pipe cavity 5 and perpendicular to the longitudinal axis of the pipe body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser sequentially passes through the optical fiber bend 7, the total reflection device 8, the reflector 9, the reflection film 10 and the total reflection device pipeline 12, changes directions and then is emitted to the tube cavity 5 through the narrow gap 14.

Or the total reflection device 8, the reflector 9 and the reflection film 10 are arranged in random arrangement after the head end 2 of the catheter and the optical fiber are bent 7, and laser enters the total reflection device pipeline 12 after the direction of the laser is sequentially changed by any optical element arranged in any arrangement mode, and then is emitted to the lumen 5 through the narrow gap 14.

Example 60:

on the basis of embodiment 1, as shown in fig. 3 to 7, 12 to 13 and 66, a preferred scheme is that an optical fiber bend 7 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the inside of the tube wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflector 9 is arranged after the total reflection device 8, a reflective film 10 is arranged after the reflector 9, a reflector duct 13 is arranged after the reflective film 10, and a slit 14 is arranged in the reflector duct 13 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed sequentially through the optical fiber bending 7, the total reflection device 8, the reflector 9, the reflection film 10 and the reflector pipeline 13.

Or, the total reflection device 8, the reflector 9 and the reflection film 10 are arranged in a random arrangement mode after the head end 2 of the conduit and the optical fiber are bent 7, a reflector pipeline 13 is arranged behind the optical elements arranged in the random arrangement mode, the laser sequentially changes the direction through the optical elements arranged in any arrangement mode and finally emits to the reflector pipeline 13, and the laser is emitted to the lumen 5 through the narrow gap 14 after being reflected by the reflector pipeline 13.

Example 61:

on the basis of embodiment 1, as shown in fig. 3 to 8, 14 and 67, it is preferable that an optical fiber bend 7 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a total reflection device 8 is disposed after the optical fiber bend 7, a reflecting mirror 9 is disposed after the total reflection device 8, a reflecting film 10 is disposed after the reflecting mirror 9, a reflecting film duct 11 is disposed after the reflecting film 10, and a slit 14 is disposed in the reflecting film duct 11 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser sequentially passes through the optical fiber bend 7, the total reflection device 8, the reflector 9, the reflective film 10 and the reflective film pipeline 11, the direction of the laser is gradually changed, and then the laser is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the pipe wall 4, the total reflection devices 8, the reflectors 9 and the reflective films 10 are arranged in a random arrangement mode after the optical fiber is bent 7, and then the reflective film pipeline 11 is arranged; after being transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the laser sequentially changes the direction through the optical fiber bending 7, the total reflection devices 8 arranged in random arrangement, the reflector 9 and the reflection film 10, and finally is emitted to the tube cavity 5 through the narrow gap 14 after the direction is changed through the reflection film pipeline 11. One or more optical fibers 6 for transmitting laser light are arranged in the pipe wall 4.

Example 62:

on the basis of the embodiment 1, as shown in fig. 3 to 5, 7 to 8, 14 and 68, a preferred scheme is that an optical fiber bend 7 is arranged at a position where an optical fiber 6 extends to a preset distance from the head end 2 through the inside of the tube wall 4, a total reflection device 8 is arranged after the optical fiber bend 7, a reflection film 10 is arranged after the total reflection device 8, a reflection film pipeline 11 is arranged after the reflection film 10, and a narrow gap 14 is arranged in the reflection film pipeline 11 towards the direction of the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser is sequentially changed in direction through the optical fiber bending 7, the total reflection device 8, the reflection film 10 and the reflection film pipeline 11 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to the pipe wall 4 at the preset distance from the head end 2 through the pipe wall 4, and the pipe wall 4 is internally provided with the optical fiber bend 7, the reflective film 10, the total reflection device 8 and the reflective film pipeline 11 in sequence, and after the laser is transmitted to the head end 2 through the optical fiber 6 in the pipe wall 4, the laser sequentially changes direction through the optical fiber bend 7, the reflective film 10, the total reflection device 8 and the reflective film pipeline 11 and then is emitted to the pipe cavity 5 through the narrow gap 14.

Example 63:

based on the embodiment 1, as shown in fig. 3, 6 to 8, 14 and 69, it is preferable that the optical fiber 6 is provided with an optical fiber bend 7 extending to a predetermined distance from the head end 2 through the tube wall 4, a reflector 9 is provided after the optical fiber bend 7, a reflective film 10 is provided after the reflector 9, a reflective film duct 11 is provided after the reflective film 10, and a slit 14 is provided in the reflective film duct 11 in a direction toward the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, and then is emitted to the tube cavity 5 from the narrow gap 14 after the direction is changed through the optical fiber bending 7, the reflector 9, the reflecting film 10 and the reflecting film pipeline 11 in sequence.

Or, the optical fiber bend 7, the reflecting film 10, the reflecting mirror 9 and the reflecting film pipeline 11 are sequentially arranged at the head end 2 of the laser catheter, and the laser is sequentially changed in direction through the optical fiber bend 7, the reflecting film 10, the reflecting mirror 9 and the reflecting film pipeline 11 and then is emitted to the lumen 5 through the narrow gap 14.

Example 64:

on the basis of embodiment 1, as shown in fig. 4 to 8, 14 and 70, a total reflection device 8 is disposed at a position where the optical fiber 6 extends to a predetermined distance from the head end 2 through the tube wall 4, a reflector 9 is disposed behind the total reflection device 8, a reflective film 10 is disposed behind the reflector 9, a reflective film duct 11 is disposed behind the reflective film 10, and a slit 14 is disposed in the reflective film duct 11 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

after being transmitted to the head end 2 through the optical fiber 6 in the tube wall 4, the laser is sequentially changed in direction through the total reflection device 8, the reflector 9, the reflective film 10 and the reflective film pipeline 11 and then is emitted to the tube cavity 5 through the narrow gap 14.

Or, the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, the arrangement of three optical elements, namely the total reflection device 8, the reflector 9 and the reflective film 10, is smoothly arranged randomly, after the laser is transmitted to the head end 2 through the optical fiber 6 arranged in the tube wall 4, the direction of the laser is sequentially changed by any optical element arranged in a random arrangement mode, the laser is emitted into the reflective film tube 11, and the laser is emitted to the tube cavity 5 through the narrow gap 14 after being reflected by the reflective film tube 11.

Example 65:

on the basis of the embodiment 1, as shown in fig. 15 and 71, the optical fiber 6 extends through the tube wall 4 to a preset distance from the head end 2, a fiber side hole 17 is provided, a reflective membrane tube 11 is provided behind the fiber side hole 17, and a slit 14 is provided in the reflective membrane tube 11 in the direction of the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser changes direction through the side hole 17 of the optical fiber, and then is reflected by the reflecting film pipe 11 and then is emitted to the pipe cavity 5 through the narrow gap 14. One or more optical fibers 6 for transmitting laser light are arranged in the pipe wall 4.

Example 66:

on the basis of the embodiment 1, as shown in fig. 15 and 72, a preferable scheme is that a fiber side hole 17 is arranged at a position where the optical fiber 6 extends to a preset distance from the head end 2 through the inside of the tube wall 4, a total reflection device tube 12 is arranged behind the fiber side hole 17, and a slit 14 is arranged in the total reflection device tube 12 in the direction towards the tube cavity 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser changes direction through the side hole 17 of the optical fiber, and then is reflected by the reflecting film in the total reflection device pipeline 12 and then is emitted to the tube cavity 5 through the narrow gap 14. The optical fiber 6 arranged in the tube wall 4 for transmitting laser is arranged into one or more than one.

Example 67:

on the basis of the embodiment 1, as shown in fig. 15 and 73, the optical fiber 6 extends through the tube wall 4 to a preset distance from the head end 2, a fiber side hole 17 is provided, a reflector tube 13 is provided behind the fiber side hole 17, and a slit 14 is provided in the reflector tube 13 in the direction of the lumen 5 and perpendicular to the longitudinal axis of the tube body 1;

the laser changes direction through the side hole 17 of the optical fiber, and then is reflected by the reflecting film in the reflector pipeline 13 and then is emitted to the lumen 5 through the narrow gap 14.

Example 68:

on the basis of the embodiment 1, as shown in fig. 74, preferably, the optical fiber 6 extends to a preset distance from the head end 2 through the tube wall 4, the optical fiber 6 is arranged in a loop shape in the tube wall in the cross-sectional direction of the tube body 1 to form a loop-shaped optical fiber 61 in a closed loop structure, a slit 14 is arranged in the direction of the loop-shaped optical fiber 61 toward the tube cavity 5 and perpendicular to the longitudinal axis of the tube body (1), the head end of the optical fiber 6 running in the longitudinal direction of the tube body 1 in the tube wall is connected with the loop-shaped optical fiber 61, and the width of the slit 14 is set to be 1-1000 micrometers; the laser light is transmitted through the optical fiber 6 in the tube wall to the annular optical fiber 61, and then the slit 14 of the annular optical fiber 61 is emitted to the lumen 5.

The optical fiber(s) for transmitting laser light to the annular optical fiber 61 in the pipe wall 4 are arranged into one or more

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.

It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a laser catheter, includes body (1), and body (1) is including head end (2), tail end (3), pipe wall (4) and lumen (5), characterized by: a plurality of optical fibers (6) which are annularly and continuously distributed or discontinuously distributed are fixedly arranged in the tube wall (4) along the longitudinal axis of the catheter; after the optical fiber (6) extends to a preset distance from the head end (2) through the pipe wall (4), an optical fiber bending part (7), an optical fiber side hole (17) or an optical reflection element is arranged, or the optical fiber bending part (7), the optical fiber side hole (17) and the optical reflection element are combined to change the direction of laser, and the laser is transmitted to the preset distance from the head end (2) along the longitudinal axis direction of the pipe body (1) through the optical fiber (6) and then changes the direction to irradiate the pipe cavity (5);

the laser is perpendicular to the longitudinal axis of the laser catheter after changing the direction, so that the laser is changed from the longitudinal axis direction of the catheter body (1) to the radial direction of the cross section and then is emitted to the lumen (5) to ablate the tissue in the lumen;

the optical fibers (6) form one or more layers of concentric circle structures;

the laser light emitted by part of the optical fiber (6) is focused in the lumen (5).

2. The laser catheter of claim 1, wherein: the optical fiber (6) extends to a preset distance away from the catheter head end (2) through the catheter wall (4) and is provided with an optical fiber bending part (7), the end face of the bent optical fiber (6) faces the catheter cavity (5), and the laser changes direction through the optical fiber bending part (7) and then emits to the catheter cavity (5).

3. The laser catheter of claim 1, wherein: the optical fiber (6) extends to a preset distance away from the head end (2) of the catheter through the inside of the catheter wall (4) and is provided with a total reflection device (8), the total reflection device (8) is composed of three elements of a reflection interface formed by light density and a setting incidence angle larger than or equal to a critical angle, and laser is totally reflected through the total reflection device (8) so that the laser is emitted to the catheter cavity (5) after the longitudinal axis direction of the catheter body (1) is changed into the radial direction of the cross section;

furthermore, one or more reflecting interfaces of the total reflection device (8) are arranged at an angle, and after the laser is totally reflected for one time or more times on the reflecting interfaces, the laser is changed from the longitudinal axis direction of the tube body (1) to the cross section radial direction and then is emitted to the tube cavity (5).

4. The laser catheter of claim 1, wherein: the optical fiber (6) is provided with a reflector (9) at a preset distance from the head end (2) in the pipe wall (4), and the reflector (9) is coated with metals including but not limited to silver, aluminum or copper from optical glass, metal and silicon carbide materials; or plating compounds including, but not limited to, silver, aluminum, or copper metal materials; the reflectors (9) are annularly arranged in the pipe wall (4) of the head end (2); the laser transmitted axially through the optical fiber (6) is reflected by the reflector (9), so that the laser is changed from the longitudinal axis direction of the tube body (1) to the cross section direction and then is emitted to the tube cavity (5).

5. The laser catheter of claim 1, wherein: the optical fiber (6) is provided with a reflecting film (10) at a preset distance from the head end (2) of the guide pipe in the pipe wall (4), the reflecting film (10) is a crystal structure formed by periodically arranging medium materials with different refractive indexes in space, the crystal structure further forms a film structure, light rays incident to the film structure can be subjected to total reflection, and the reflecting films (10) are sequentially arranged in the pipe wall (4) of the head end (2) along the radial direction of the guide pipe to form a ring structure; the laser transmitted in the axial direction through the optical fiber (6) changes the direction through the reflecting film (10), so that the laser is changed from the longitudinal axis direction of the tube body (1) to the cross section direction and then is emitted to the tube cavity (5).

6. The laser catheter of claim 1, wherein: the optical fiber (6) is provided with an annular pipeline which is shaped along the radial direction of the pipe body (1) and extends to a preset distance away from the head end (2) in the pipe wall (4), the inner wall of the annular pipeline is provided with a reflecting film (10) to form a reflecting film pipeline (11), a narrow gap (14) is arranged in the reflecting film pipeline (11) towards the direction of the pipe cavity (5) and is vertical to the longitudinal axis of the pipe body (1), and the width of the narrow gap (14) is set to be 1-1000 micrometers; the laser is transmitted into the reflecting film pipeline (11) through the optical fiber (6), reflected by the reflecting film pipeline and then emitted to the tube cavity (5) through the narrow gap (14);

a plurality of optical fibers (6) are arranged in the pipe wall (4) for transmitting laser and transmitting the laser to the reflecting film pipeline (11).

7. The laser catheter of claim 1, wherein: the optical fiber (6) is provided with an annular pipeline which is shaped along the radial direction of the catheter and extends to a preset distance away from the head end (2) of the catheter in the catheter wall (4), the inner wall of the annular pipeline is provided with a total reflection device (8) to form a total reflection device pipeline (12), a narrow gap (14) is arranged in the total reflection device pipeline (12) in the direction towards the catheter cavity (5) and perpendicular to the longitudinal axis of the catheter body (1), and the width of the narrow gap (14) is set to be 1-1000 micrometers; the laser is transmitted into the total reflection device pipeline (12) through the optical fiber (6), reflected by the total reflection device pipeline and then emitted to the pipe cavity (5) through the narrow gap (14);

the optical fibers (6) which are arranged in the pipe wall (4) for transmitting laser and guiding the laser into the total reflection device pipeline (12) are multiple.

8. The laser catheter of claim 1, wherein: the optical fiber (6) is provided with an annular pipeline which is shaped along the radial direction of the guide pipe and extends to a preset distance away from the head end (2) in the pipe wall (4), the inner wall of the annular pipeline is provided with a reflector (9) to form a reflector pipeline (13), a narrow gap (14) is arranged in the reflector pipeline (13) towards the pipe cavity (5) and is vertical to the longitudinal axis of the pipe body (1), the width of the narrow gap (14) is set to be 1-1000 micrometers, and laser is transmitted into the reflector pipeline (13) through the optical fiber (6), reflected by the reflector pipeline and then emitted to the pipe cavity (5) through the narrow gap (14);

the optical fibers (6) which are arranged in the pipe wall (4) and transmit laser and guide the laser into the reflector pipeline (13) are provided with a plurality of optical fibers.

9. The laser catheter of claim 1, wherein: optical fiber (6) set up the side opening in optical fiber (6) towards the direction of lumen (5) after extending to the distance department of predetermineeing apart from head end (2) in pipe wall (4), constitute optical fiber side opening (17), and the optical fiber end adopts total reflection optical element to seal, and the width of optical fiber side opening sets up to 1~1000 microns, and laser transmits to laser guide pipe head end back through optical fiber (6), through optical fiber side opening (17) directive lumen (5).

10. The laser catheter of claim 1, wherein: after the optical fiber (6) extends to a preset distance from the head end (2) through the pipe wall (4), the optical fiber (6) is arranged in a pipe wall in the cross section direction of the pipe body (1) in an annular walking mode to form an annular optical fiber (61) of a closed-loop structure, a slit (14) is arranged in the direction, facing the pipe cavity (5), of the annular optical fiber (61) and perpendicular to the longitudinal axis of the pipe body (1), the width of the slit (14) is set to be 1-1000 micrometers, laser is transmitted to the annular optical fiber (61) through the optical fiber (6), and then the laser is emitted to the pipe cavity (5) through the slit (14) of the annular optical fiber (61).