CN210903223U

CN210903223U - Bendable suction sheath

Info

Publication number: CN210903223U
Application number: CN201921071718.4U
Authority: CN
Inventors: 严航; 郑忠伟
Original assignee: Innovex Medical Co Ltd
Current assignee: Shanghai innova Medical Instrument Co.,Ltd.
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-07-03
Anticipated expiration: 2029-07-09

Abstract

The embodiment of the utility model provides a relate to the medical instrument field, disclose a flexible attraction sheath, include: the dilator comprises an outer sheath pipe and an dilator catheter, wherein the dilator catheter penetrates through the outer sheath pipe and extends out of an opening at the end part of an insertion end of the outer sheath pipe, the insertion end of the outer sheath pipe is provided with a bendable sheath pipe head, the non-insertion end of the outer sheath pipe is provided with an outer sheath pipe joint, the outer sheath pipe joint is provided with a bending control button, and the outer sheath pipe joint is further provided with a sealing part and a water outlet. The utility model discloses embodiment sets the head of outer sheath pipe to flexible structure, when carrying out the intubate to the patient, utilizes the crooked control button that sets up in outer sheath union coupling department can control the propulsion direction that attracts the sheath in a flexible way, prevents that the sheath pipe from colliding patient's internal organs, reduces the injury to the patient.

Description

Bendable suction sheath

Technical Field

The utility model relates to the field of medical equipment, in particular to flexible attraction sheath.

Background

Nephrolithiasis is a common urinary tract disease, male diseases are more than female diseases, ureteroscope lithotomy is adopted in the treatment process, a ureteroscope enters a ureter from the urethra through the bladder, then a stone-covering basket or a stone-taking forceps is used for taking out calculus, or a pneumatic ballistic lithotripter, a laser lithotripter, an ultrasonic ballistic lithotripter and other lithotripters are used under the ureteroscope, accurate lithotripter is conducted under the guide of the ureteroscope for peeking, and the calculus is taken out after being smashed. The ureteroscope must be used with the ureter suction sheath, and a channel is firstly established in a patient body by using the suction sheath, and then the established channel is used for extending into the endoscope to carry out treatment such as stone breaking, stone extraction and the like.

In clinic, some patients have stones under the renal pelvis, the angle is large, the bending degree of the ureteroscope is difficult to reach the stones, and doctors hope that an ideal suction sheath has certain hardness and certain softness. The suction sheath tube with certain hardness is used for facilitating insertion of a device, has certain flexibility and can effectively prevent the internal organs of a patient from being damaged in the pushing process, the suction sheath widely used clinically at present cannot be bent, so that the flexible ureteroscope suction sheath is difficult to place in the renal pelvis, and the requirements of a clinician on use cannot be met if the composition structure of the flexible ureteroscope suction sheath is not improved.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a flexible attraction sheath for when the attraction sheath impels in the human body, the flexible reduces the injury to the patient with nimble redirecting.

In order to solve the above technical problem, an embodiment of the present invention provides a bendable suction sheath, including: the dilator comprises an outer sheath pipe and an dilator catheter, wherein the dilator catheter penetrates through the outer sheath pipe and extends out of an opening at the end part of an insertion end of the outer sheath pipe, the insertion end of the outer sheath pipe is provided with a bendable sheath pipe head, the non-insertion end of the outer sheath pipe is provided with an outer sheath pipe joint, the outer sheath pipe joint is provided with a bending control button, and the outer sheath pipe joint is further provided with a sealing part and a water outlet.

The utility model discloses embodiment is for prior art, and main difference and effect lie in: the head of the sheath tube is set to be of a bendable structure, when a patient is intubated, the propelling direction of the suction sheath can be flexibly controlled by the aid of the bending control button arranged at the joint of the sheath tube, so that the sheath tube is prevented from colliding with internal organs of the patient, and injury to the patient is reduced. Meanwhile, the outer sheath tube and the dilator catheter both adopt multiple channels, and multiple surgical instruments can be used for treating in parallel, so that the operation time is shortened, and the efficiency is improved. In addition, this flexible attraction sheath simple structure, convenient to use is worth carrying out extensive popularization and application.

In addition, the flexible sheath head is of a snake bone structure, and the snake bone structure is adopted to flexibly realize the bending function.

In addition, the water outlet is connected with a negative pressure suction device, and liquid, gravels and cut pathological tissues from a diseased part are sucked to the water outlet by utilizing negative pressure and flow out of the body of a patient.

In addition, the bending control button is a knob or a multi-position toggle switch, and can flexibly control the head of the sheath tube of the suction sheath to bend the sheath tube in different directions or at different angles, so that the requirement of treatment is met.

In addition, an extensible flexible pipe is embedded into the head of the sheath pipe, and the length of the head of the sheath pipe can be increased when the flexible pipe extends out, so that broken stones or pathological tissues far away can be reached.

In addition, the sheath tube joint is also provided with a push-pull device which is connected with the flexible tube and used for pushing the flexible tube out of the sheath tube head or pulling the flexible tube into the sheath tube head, the push-pull device is used for flexibly controlling the flexible tube to extend and retract, and different treatment requirements are provided according to the conditions of different pathological positions in a patient body.

In addition, the non-insertion end of the dilator catheter is provided with a dilator joint, and the dilator joint is connected with the outer sheath pipe joint in a matching way, so that the outer sheath pipe and the dilator catheter are kept relatively static, and the effect of the intubation tube is prevented from being influenced by relative movement.

In addition, the expander joint is connected with the outer sheath pipe joint in a clamping or hinge mode, so that the connection is firmer and the looseness is prevented.

In addition, a water injection channel and/or a negative pressure channel are/is arranged in the outer sheath tube, the water injection channel injects physiological saline into the body of a patient to flush away human tissues or dirt in front of the camera so as to enable the camera to obtain a clear visual field. The negative pressure channel utilizes negative pressure to suck liquid, gravels and cut pathological tissues from a diseased part to the water outlet and flow out of the body of a patient.

In addition, the dilator catheter comprises a plurality of cavities, multiple channels are adopted, multiple surgical instruments are used for treating in parallel, the operation time is shortened, and the efficiency is improved.

In addition, the plurality of cavities comprise at least one of a guide wire channel, an instrument channel and a water injection channel.

In addition, the guide wire channel, the instrument channel and the water injection channel share the same channel, so that the number of the channels is reduced, and the outer diameter of the dilator catheter is further reduced.

In addition, a guide wire inlet, an instrument outlet and a water injection port are arranged on the end face of the insertion end of the dilator catheter, so that interference of different surgical instruments is avoided.

In addition, the inserting end of the dilator catheter is conical, so that the dilator catheter can be inserted into a patient body more quickly, and the pain of the patient is reduced.

Drawings

Fig. 1 is a schematic structural view of a bendable suction sheath provided according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an outer sheath of a flexible suction sheath according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a silicone gasket with a variable inner diameter for a bendable suction sheath according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a silicone gasket with a fixed inner diameter for a bendable suction sheath according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of an dilator catheter with a bendable suction sheath according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will explain in detail each embodiment of the present invention with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

The utility model discloses embodiment provides a flexible attraction sheath. Fig. 1 is a schematic structural diagram of a bendable suction sheath provided according to an embodiment of the present invention, the bendable suction sheath includes: the external sheath catheter 1 is mainly used for establishing a channel for operation in a patient body, and the dilator catheter 2 mainly plays a guiding role.

In one example, the outer sheath 1 has a bendable sheath head 12, and the sheath head 12 is provided in a bendable configuration, such as in a serpentine configuration, or in a braided wire configuration, using a flexible bendable material. Further, the sheath head 12 is embodied in a tip molding shape; the sheath head 12 and the sheath body are integrally connected in a seamless manner.

Referring to fig. 2 together, fig. 2 is a schematic cross-sectional view illustrating the sheath 1 according to the present embodiment, and further, the sheath 1 may have a three-layer structure including an outer layer 13, an intermediate layer 14, and an inner layer 15. The outer layer 13 is an elastic polymer layer made of, for example, nylon elastomer or polyurethane elastomer, the intermediate layer 14 is a woven wire structure made of metal wire, and the inner layer 15 is a lubricating polymer layer made of, for example, teflon or polyethylene. Each layer of the outer sheath tube 1 is made of non-metal materials, the texture is soft, discomfort can not be caused to a patient, the manufacturing cost is low, the production cost is low, the outer sheath tube can be used as a disposable surgical instrument, and economic pressure can not be caused to the patient. Further, a plurality of metal control wires 19 are provided in the braided wire layer to improve the hardness and toughness of the braided wire layer and prevent deformation.

Further, the outer sheath tube 1 has a water injection channel 17 and a negative pressure channel 18 therein, the water injection channel 17 is used for flowing through the physiological saline in the patient body, and the negative pressure channel 18 is used for flowing through the liquid and the gravels from the affected part.

Accordingly, the outer sheath tube joint 16 is provided with a water injection port 163, and the physiological saline is injected through the water injection port 163 and supplied into the patient through the water injection passage 17, while the water is sucked out of the patient through the water injection port 163. The outer sheath pipe joint 16 may further be provided with a water outlet 164, and further, the water outlet 164 is connected to a negative pressure suction device, so as to suck the liquid and the gravels in the negative pressure channel 18 to the water outlet 164 and discharge the liquid and the gravels into the negative pressure suction device through the water outlet 164.

Further, a sheath tube joint 16 is provided at the non-insertion end of the sheath tube 1, a bending control button 161 is provided on the sheath tube joint 16, and a lead wire is connected between the bending control button 161 and the sheath head 12 for controlling the bending of the sheath head 12, and the lead wire may be a metal wire.

In one example, one lead is connected to the bending control knob 161, the other end of the lead is fixed to the sheath head 12, and the bending control knob 161 is specifically a knob that is rotated to pull the lead to pull the sheath head 12, so that the sheath head 12 is bent, and the degree of bending of the sheath head 12 can be controlled by controlling the rotation angle of the knob.

In another example, the bending control button 161 is connected to a plurality of leads, the other ends of the plurality of leads are respectively fixed at different radial positions of the sheath head 12, corresponding to different bending directions, and the bending control button 161 is specifically a multi-position toggle switch, when a certain switch is toggled, the lead at the corresponding position is pulled to pull the sheath head 12, so that the sheath head 12 is bent towards the fixed direction.

Furthermore, an extensible flexible pipe can be embedded in the head part of the sheath pipe. Correspondingly, a push-pull device is also arranged on the sheath pipe joint and connected with the flexible pipe for pushing the flexible pipe out of the sheath pipe head or pulling the flexible pipe into the sheath pipe head. When the flexible tube is pushed out of the head of the sheath tube, the length of the head of the sheath tube is lengthened, so that the broken stones or pathological tissues at a far distance can be reached.

As described above, when the patient is intubated, the moving direction of the sheath head 12 can be flexibly controlled by operating the bending control knob 161 during advancing the tube, and the sheath can be prevented from colliding with the organs of the patient and injuring the organ. When a broken stone or pathological tissue at a far distance needs to be treated, the flexible tube embedded in the sheath head 12 is extended by operating the push-pull device, for example, by pushing, and smoothly reaches the far position to be treated, and the flexible tube is retracted into the sheath head 12 again by pulling after the treatment. Therefore, different treatment requirements can be provided according to the conditions of different pathological positions in the body of the patient.

In one example, the outer sheath 1 has a cavity therein through which the dilator catheter 2 passes. The insertion end of the outer sheath 1 has an opening through which the dilator catheter 2 extends, and the non-insertion end of the dilator catheter 2 extends out of the outer sheath 1 through the outer sheath coupling 16. When a patient is intubated, the outer sheath 1 and the dilator catheter 2 are kept relatively stationary to prevent the movement therebetween from affecting the intubation effect, and therefore, a fixing device is further provided between the outer sheath joint 16 and the dilator catheter 2 to fix the outer sheath 1 and the dilator catheter 2 relatively. In one embodiment, an expander hub 21 is provided at the non-inserted end of the expander catheter 2, the expander hub 21 being matingly connectable to the outer sheath hub 16.

Specifically, the outer sheath tube joint 16 is connected with the expander joint 21 in a clamping manner, for example, a protrusion is provided at the top end of the outer sheath tube joint 16, the expander joint 21 has a claw 211, that is, an inward protrusion is formed on the inner wall of the expander joint 21, and a hand grip portion 212 capable of controlling the opening of the claw 211 is further provided on the expander joint 21, when a user grips the hand grip portion 212, the claw 211 is opened, and when the expander joint 21 reaches the clamping position, the hand grip portion 212 is released, the outer sheath tube joint 16 is clamped with the expander joint 21.

In particular, the outer sheath hub 16 may also be hingedly connected to the dilator hub 21.

Further, a sealing member 162 is disposed at the interface of the sheath tube joint 16, and the sealing member 162 may be, for example, a silica gel gasket, and the silica gel gasket is made of negative pressure silica gel, which has a suction force and can assist the negative pressure suction device to suck the liquid and the crushed stone in the negative pressure channel 18 to the water outlet 164 and flow out of the patient.

Specifically, the silicone gasket may be configured as a silicone gasket having a variable inner diameter structure as shown in fig. 3, the inner cavity diameter of the silicone gasket is not fixed, and when the silicone gasket is covered on the end face at the interface of the outer sheath tube joint 16, the inner cavity diameter is adapted to the inner diameter of the outer sheath tube by means of extrusion, and a seal is formed at the interface of the outer sheath tube joint 16.

Specifically, the silicone gasket may be configured as a silicone gasket having an inner diameter fixing structure as shown in fig. 4, the inner cavity diameter of the silicone gasket is a fixed diameter designed according to the inner diameter of the outer sheath tube, and when the silicone gasket is covered on the end face at the interface of the outer sheath tube joint 16, a seal is formed at the interface of the outer sheath tube joint 16. Further, to prevent the silicone gasket from falling off, the silicone gasket is designed to further include a fixing part 162-1, and the fixing part 162-1 is sleeved on the outer sheath pipe joint 16 and is fixed, so that a pulling force is formed on the silicone gasket to prevent the silicone gasket from falling off.

Further, the outer surface of the outer sheath tube 1 is coated with a hydrophilic coating, which helps the suction sheath to better blend with the internal environment of the patient when the suction sheath is applied to the patient, and reduces the discomfort of the patient.

Further, the inner surface of the outer sheath 1 is coated with a lubricating material, so that the dilator catheter can be more easily passed into the sheath.

Referring also to the schematic cross-sectional view of the dilator catheter 2 of the present embodiment as shown in fig. 5, the dilator catheter 2 is provided with a guide wire channel 22, and a guide wire can enter the guide wire channel 22 from the entrance of the guide wire channel 22, pass through the guide wire channel 22 and extend out from the guide wire exit 25. In one example, the guidewire inlet is disposed at the insertion end of the dilator catheter 2 and the guidewire outlet 25 is disposed at the non-insertion end of the guidewire channel 22. An instrument channel 23 for inserting an endoscope is further arranged in the dilator catheter 2, and an instrument outlet 26 of the instrument channel 23 is arranged on the end face of the insertion end of the dilator catheter 2 and also on the outer peripheral surface of the dilator catheter 2 close to the end face. In the process of intubation, the endoscope penetrates out of the instrument channel 23, so that real-time shooting can be performed on the intubation process by the endoscope, and shot pictures can be transmitted out in real time, so that the visual intubation process is realized. Furthermore, after the endoscope for observation is drawn out after the intubation is finished, the instrument channel 23 can be used for further treatment of the patient by extending other surgical instruments into the instrument channel 23, and the injury of the patient caused by secondary intubation is avoided.

Furthermore, an independent water injection channel 24 is arranged in the expander conduit 2, a water injection port 27 of the water injection channel 24 is arranged at the non-insertion end of the expander conduit 2, and a water outlet of the water injection channel 24 is arranged on a conical surface of the insertion end of the expander conduit 2 close to the instrument outlet. When the tube is inserted, the physiological saline can be injected into the water injection channel 24 to wash away human tissues or dirt in front of the camera, so that the camera can obtain a clear visual field. When the intubation is completed, the normal saline or blood in the patient can be sucked out through the water injection port 27. Meanwhile, when the patient is treated, the water injection channel 24 may be used for auxiliary treatment of the operation, or the water injection channel 24 may be used for sucking out pathological tissues such as crushed stones or cut tissues in the patient.

Further, in order to better control the water inflow and the water inflow rate in the water filling channel 24, it is preferable to provide a valve on the water filling port 27. In addition, the water injection port 27 can be filled with an external manual syringe, a hydraulic pump or a hanging titration so that the camera can obtain a clear view.

Further, since the dilator catheter 2 is advanced into the patient during intubation, in order to facilitate entry of the dilator catheter 2 into the patient, it is preferable to taper the insertion end of the dilator catheter 2 such that the outer diameter of the insertion end of the dilator catheter 2 is reduced to facilitate entry into the patient. The instrument outlet of the instrument channel 23 is preferably arranged on the end face of the insertion end of the dilator catheter 2 and the entrance of the guide wire channel 22 is arranged on the conical surface of the insertion end of the dilator catheter 2.

In another example, the device channel 23 may be used as a water pipe for water injection, and more specifically, the water injection port 27 may be connected to the device channel 23 to inject physiological saline into the patient through the water injection port 27, and the water may be sucked out of the patient through the water injection port 27. The outer diameter of the dilator catheter 2 is not increased by using the instrument channel 23 as a water injection channel.

In another example, the guide wire channel 22 may be used as a water pipe for water injection, and specifically, the water injection port 27 may be connected to the guide wire channel 22 to inject the physiological saline into the patient through the water injection port 27, and the water may be sucked out of the patient through the water injection port 27. The use of the guide wire channel 22 as an infusion channel does not increase the outer diameter of the dilator catheter 2.

In another example, in order to further reduce the outer diameter of the dilator catheter 2, only one instrument channel 23 may be provided in the dilator catheter 2, and the instrument channel 23 may be used to perform functions such as water injection or threading, and in order to prevent the guide wire entering the instrument channel 23 from interfering with the surgical instrument such as an endoscope, a guide wire inlet and an instrument outlet are separately provided at the insertion end of the dilator catheter 2, respectively, through which the guide wire enters the instrument channel 22, and through which the surgical instrument protrudes from the instrument channel 23, so that the guide wire and the surgical instrument can be completely prevented from interfering.

Further, the instrument channel 23 is also used as a water injection channel, and the physiological saline is injected into the patient through the water injection port 27, and the water is also sucked out of the patient through the water injection port 27. The utility model discloses in, seal wire import and apparatus export all are located expander pipe 2's the tip that inserts, because expander pipe 2's the tip that inserts be the toper structure, can set up seal wire import and apparatus export respectively wantonly on conical terminal surface or on the conical surface to avoid increasing expander pipe 2's the external diameter that inserts the tip.

When the endoscope is specifically implemented, firstly, the guide wire is penetrated into the body of a patient by using the special endoscope until the renal pelvis is reached, then, one end of the guide wire, which is positioned outside the body of the patient, extends into the guide wire from the guide wire inlet, the dilator catheter 2 and the sheath catheter 1 can be inserted into the urethra of the patient together by using the guide wire, the tip of the dilator catheter 2 is used for opening the channel by depending on the guide wire, meanwhile, the endoscope in the instrument channel 23 is used for observing the insertion process in real time, the sheath catheter 1 is inserted into the position, the dilator catheter 2 and the guide wire and the endoscope are pulled out after the insertion is completed, and the endoscope with larger outer.

To sum up, the utility model discloses flexible attraction sheath among the embodiment sets the head of sheath pipe to flexible structure, when carrying out the intubate to the patient, utilizes the crooked control button that sets up sheath union coupling department can control the propulsion direction who attracts the sheath in a flexible way, prevents that the sheath pipe from colliding patient's internal organs, reduces the injury to the patient. Meanwhile, the outer sheath tube and the dilator catheter both adopt multiple channels, and multiple surgical instruments can be used for treating in parallel, so that the operation time is shortened, and the efficiency is improved. In addition, this flexible attraction sheath simple structure, convenient to use is worth carrying out extensive popularization and application.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims

1. The utility model provides a flexible attraction sheath, its characterized in that includes outer sheath pipe and expander pipe, the expander pipe is worn to locate in the outer sheath pipe, and follow stretch out in the opening of the end portion that inserts of outer sheath pipe, the end that inserts of outer sheath pipe is equipped with flexible sheath pipe head, the non-end that inserts of outer sheath pipe is equipped with outer sheath coupling, be provided with the crooked control button on the outer sheath coupling, still be provided with sealing member and delivery port on the outer sheath coupling.

2. The flexible suction sheath of claim 1, wherein the flexible sheath head is of a serpentine configuration.

3. The flexible suction sheath of claim 1, wherein a negative pressure suction device is connected to the water outlet.

4. The flexible suction sheath of claim 1, wherein the bend control knob is a rotary knob or a multi-position toggle switch.

5. The flexible suction sheath of claim 1, wherein an extendable flexible tube is embedded within the sheath head.

6. The flexible suction sheath according to claim 5, wherein a push-pull means is further provided on the outer sheath connector, the push-pull means being connected to the flexible tube for pushing the flexible tube out of the sheath head or pulling the flexible tube into the sheath head.

7. The flexible suction sheath of claim 1, wherein the non-inserted end of the dilator catheter is provided with a dilator adaptor that is matingly coupled to the outer sheath adaptor.

8. The flexible introducer sheath according to claim 7, wherein the dilator hub is snap-fit or hingedly connected to the outer sheath hub.

9. The flexible suction sheath of claim 1, wherein the dilator catheter has a water injection channel and/or a negative pressure channel disposed therein.

10. The flexible suction sheath of claim 1, wherein the dilator catheter includes a plurality of lumens.

11. The flexible suction sheath of claim 10, wherein the plurality of lumens comprises at least one of a guidewire channel, an instrument channel, and a water injection channel.

12. The flexible suction sheath of claim 11, wherein the guidewire channel, the instrument channel, and the water injection channel share a common channel.

13. The flexible suction sheath according to claim 1 or 12, wherein a guide wire inlet, an instrument outlet and a water injection port are provided on an end face of the insertion end of the dilator catheter.

14. The flexible suction sheath of claim 13, wherein the insertion end of the dilator catheter is tapered.