CN215275333U - Medical catheter body, balloon catheter and medical device - Google Patents

Abstract

The utility model provides a medical catheter body, a balloon catheter and a medical device, wherein the medical catheter body comprises a catheter main body and an electric conductor; a plurality of windows are formed on the outer surface of the catheter main body; the electrical conductor is embedded within the wall of the catheter body and at least partially surrounds the axis of the catheter body and forms a helical structure, with at least a portion of the electrical conductor exposed at the window to form an electrode. Through embedding the electric conductor in the pipe wall of pipe main part, can reduce the external diameter of the medical pipe body, the electric conductor forms helical structure partially at least simultaneously, is favorable to strengthening the compliance of the medical pipe body to strengthen the life of the medical pipe body.

Description

Medical catheter body, balloon catheter and medical device

Technical Field

The utility model relates to the field of medical equipment, concretely relates to medical pipe body, sacculus pipe and medical device.

Background

With the development of Percutaneous Coronary Intervention (PCI), the number of lesions involved is increasing and more complicated. Coronary calcified lesions, especially severe calcified lesions such as those associated with tortuosity, angulation, and diffusion, have been difficult to intervene. Correct identification and assessment of calcified lesions, and selection of appropriate interventional therapy techniques are key to improving the treatment effect of surgery, reducing the complications of surgery, and improving the near-term and far-term prognosis of patients.

In the prior art, there are two main ways of treating calcified lesions: one is to adopt the traditional high-pressure balloon catheter to expand the diseased vascular part, but the method is easy to cause air pressure injury, and the intima of the blood vessel is torn, so that complications such as thrombus, intravascular restenosis and the like are caused. The other is to introduce a shock wave balloon catheter to the lesion site to destroy fibrosis and calcified plaque in the blood vessel by the electrohydraulic effect, which is based on the principle that a high-voltage pulse electric field is generated in the blood vessel through a shock waveguide tube to generate shock waves (generally, sound waves) with short duration (generally less than 10ms) and high energy, and when the shock waves are transmitted to the calcified plaque on the blood vessel, the shock waves impact the calcified plaque to crack the calcified plaque. The shock wave is repeatedly generated until the calcified plaque is disintegrated and broken, so that the calcified lesion site can be expanded at low pressure, thereby avoiding the air pressure injury. However, in the shock wave balloon catheter in the prior art, the shock wave emitting device is superposed on the surface of the catheter main body, and the balloon covers the shock wave emitting device, so that the shock wave balloon catheter has a larger outer diameter, is difficult to reach a lesion area, and reduces the success rate of the operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a medical pipe body, sacculus pipe and medical device reduce the external diameter of sacculus pipe, utilize it to pass through pathological change blood vessel, can improve the operation success rate.

In order to achieve the purpose, the utility model provides a medical catheter body which is characterized by comprising a catheter main body and an electric conductor; a window is formed on the outer surface of the catheter main body; the electrical conductor is embedded within the wall of the catheter body and at least partially surrounds the axis of the catheter body to form a helical structure, and a portion of the electrical conductor is exposed at the window to form an electrode.

Optionally, at least two of said windows are formed in said catheter body; the number of the electric conductors is at least two, and the electrodes formed by at least two electric conductors are used for forming at least one pair of electrode pairs.

Alternatively, a part of each of the electric conductors is formed in the spiral structure, and another part extends in the axial direction of the catheter main body to be in a linear structure.

Optionally, each of the electrical conductors is formed as the helical structure throughout the entire length of the catheter body in the axial direction.

Optionally, at least one of the electric conductors is used for connecting with the positive electrode of the pulse generator, so that the formed electrode is the positive electrode; at least one electric conductor is used for being connected with the negative electrode of the pulse generator, so that the formed electrode is the negative electrode; the exposed area of at least one positive electrode at the window corresponding to the positive electrode is larger than that of at least one negative electrode at the window corresponding to the negative electrode.

Optionally, the window is disposed at the distal end of the catheter body, and at least part of the distal end of the electrical conductor terminates at a different location in the axial direction of the catheter body.

Optionally, at least one of the electric conductors is used for connecting with the positive electrode of the pulse generator, so that the formed electrode is the positive electrode; at least one electric conductor is used for being connected with the negative electrode of the pulse generator, so that the formed electrode is the negative electrode; the positive electrodes and the negative electrodes are alternately arranged in a circumferential direction and/or an axial direction of the catheter body.

Optionally, the catheter main body comprises an inner tube and an outer tube, and the outer tube is provided with a through hole as the window; the electrical conductor is disposed between the inner tube and the outer tube.

In order to achieve the above object, the present invention further provides a balloon catheter, comprising the medical catheter body and a balloon as described in any one of the above, wherein the balloon is sleeved on the medical catheter body and covers the electrode.

In order to achieve the above object, the present invention further provides a medical device, comprising the balloon catheter and the pulse generator, wherein the pulse generator is connected to the electrical conductor to transmit electrical signals to the electrode and generate shock waves.

Compared with the prior art, the utility model discloses a medical pipe body, sacculus pipe and medical device have following advantage:

the medical catheter body comprises a catheter main body and an electric conductor; a window is formed on the outer surface of the catheter main body; the electric conductor is embedded in the tube wall of the catheter main body and at least partially surrounds the axis of the catheter main body to form a spiral structure, and a local area of the electric conductor is exposed from the window to form an electrode, so that the electric conductor is tightly connected with the catheter main body, the stability of the medical catheter body is improved, the medical catheter body has better flexibility, and meanwhile, the outer diameter of the medical catheter body is effectively reduced as the electric conductor is embedded in the tube wall of the catheter main body. When the medical catheter body is applied to a balloon catheter, the outer diameter of the balloon catheter can be reduced, and the balloon catheter can pass through blood vessels conveniently.

Drawings

The accompanying drawings are included to provide a better understanding of the present invention and are not intended to constitute an undue limitation on the invention. Wherein:

fig. 1 is a schematic structural view of a medical catheter body according to an embodiment of the present invention;

fig. 2 is an axial cross-sectional view of a medical catheter body provided in accordance with an embodiment of the present invention;

fig. 3 is a partial cross-sectional view of a medical catheter body according to one embodiment of the present invention;

fig. 4 is a schematic structural diagram of a balloon catheter according to an embodiment of the present invention, in which an electrical conductor is not shown;

fig. 5 is a schematic diagram of a medical device according to an embodiment of the present invention;

fig. 6 is a partial cross-sectional view of a medical catheter body according to a second embodiment of the present invention;

fig. 7 is a partial cross-sectional view of a medical catheter body according to a third embodiment of the present invention;

fig. 8 is an axial cross-sectional view of a medical catheter body according to a third embodiment of the present invention.

[ reference numerals are described below ]:

110-a catheter body;

111-a window;

120-electrical conductor, 120 a-first electrical conductor, 120 b-second electrical conductor;

121-electrode;

200-a balloon;

300-pulse generator.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As used herein, the terms "proximal" and "distal" refer to the relative orientation, relative position, and orientation of elements or actions with respect to one another from the perspective of a clinician using the medical device, and although "proximal" and "distal" are not intended to be limiting, the term "proximal" generally refers to the end of the medical device that is closer to the clinician during normal operation, and the term "distal" generally refers to the end that is first introduced into a patient.

The core aim at of the utility model provides a medical catheter body, medical catheter body includes pipe main part and electric conductor. A window is formed on an outer surface of the catheter body. The electrical conductor is embedded within the wall of the catheter body and at least partially surrounds the axis of the catheter body to form a helical structure, and a portion of the electrical conductor is exposed from the window to form an electrode. The electric conductor is embedded in the tube wall of the catheter main body, so that the outer diameter of the medical catheter body cannot be increased, and when the medical catheter body is applied to various medical instruments needing to be introduced into a patient body, such as a balloon catheter, the outer diameter of the balloon catheter cannot be increased due to the fact that the catheter main body, the electric conductor and the balloon are overlapped in the radial direction, and the situation that the balloon catheter cannot pass through a lumen (mainly blood vessels) is caused. Moreover, the conductive body at least partially surrounds the axis of the catheter main body to form a spiral structure, so that the medical catheter body has better flexibility, the passing performance is improved, the connection strength of the conductive body and the catheter main body is increased, and the overall stability of the medical catheter body is improved.

In addition, the utility model discloses still provide including the sacculus pipe of the medical catheter body, and include the medical device of sacculus pipe.

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

< example one >

FIG. 1 shows a schematic view of the embodiment providing a medical catheter body; FIG. 2 shows an axial cross-sectional view of the medical catheter body; fig. 3 shows a partial structural schematic view of the medical catheter body.

Referring to fig. 1-3, the medical catheter body includes a catheter body 110 and an electrical conductor 120. The catheter body 110 has a plurality of windows 111 formed on an outer surface thereof. The conductive body 120 is embedded within the wall of the catheter body 110 and at least partially surrounds the axis of the catheter body 110 to form a helical structure. A portion of the conductive body 120 is exposed at least a portion of the windows 111 of the plurality of windows 111 to form an electrode 121. By embedding the conductive body 120 into the wall of the catheter body 110, the outer diameter of the medical catheter body can be reduced. The conductive body 120 is at least partially formed into a spiral structure, so that on one hand, the flexibility of the medical catheter body can be improved, the medical catheter body has good bending performance, and on the other hand, the contact area between the conductive body 120 and the catheter main body 110 can be increased, the bonding strength between the conductive body and the catheter main body can be further enhanced, and the impact resistance and the service life of the medical catheter body can be improved.

In this embodiment, please refer to fig. 3, a portion of the conductive body 120, such as a proximal portion, is wound in a spiral configuration around the axis of the catheter body 110, and a distal portion is extended along the axial direction of the catheter body 110 in a linear configuration.

It is understood that the medical catheter body can be used in various occasions, for example, when calcified lesions of blood vessels are treated, a balloon catheter capable of generating shock waves can be formed by arranging the balloon on the medical catheter body, and then the balloon catheter is used for generating an electrohydraulic effect to remove calcified plaques on the blood vessels. For ease of understanding, the medical catheter body is described herein as being applied to the treatment of calcified lesions of a blood vessel.

When the medical catheter body is used for a balloon catheter, the window 111 is formed on the outer surface of the distal end of the catheter main body 110, so that a partial region of the distal end of the conductive body 120 is exposed at the window 111 to form the electrode 121. Thus, when a balloon (not shown) is disposed on the outer surface of the distal end of the medical catheter body, the balloon may cover all of the electrodes 121.

In more detail, the catheter main body 110 is formed with a plurality of (i.e., two or more) windows 111. The medical catheter body comprises a plurality of the conductive bodies 120, at least one electrode 121 can be formed on each conductive body 120, and at least one pair of electrode pairs can be formed by the electrodes 121 on the plurality of conductive bodies 120. Specifically, in use, the proximal end of at least one of the conductors 120 is used to connect to the positive pole of a pulse generator 300 (shown in fig. 5), while the proximal end of at least one of the conductors 120 is used to connect to the negative pole of the pulse generator 300. The conductor 120 for connecting to the positive electrode of the pulse generator is referred to as a first conductor 120a (see fig. 5 and fig. 6 for reference), and the electrode 121 formed thereon may be referred to as a positive electrode. The conductor 120 for connecting with the negative electrode of the pulse generator 300 is referred to as a second conductor 120b (see fig. 5 and fig. 6 for reference), on which an electrode is formed, which may be referred to as a negative electrode, and a positive electrode and a negative electrode form a pair of electrode pairs. When the pulse generator transmits an electric signal to the electrode pair, the electrode pair can generate a shock wave which can impact the calcified plaque to break the calcified plaque.

In order to form the positive electrode formed of the first conductor 120a and the negative electrode formed of the second conductor 120b into an electrode pair, the first conductor 120a and the second conductor 120b should be separated from each other without contact. In practice, it is preferred that all of the electrical conductors 120 are not in contact, for example, referring to fig. 3 with emphasis on the arrangement of multiple electrical conductors 120 spaced circumferentially along the catheter body 110.

As can be appreciated by those skilled in the art, the number of electrode pairs is related to the number of first conductors 120 a. For example, in one non-limiting implementation, the number of the conductive bodies 120 is six, five of the conductive bodies are the first conductive bodies 120a, and another one of the conductive bodies is the second conductive body 120b, and one of the electrodes 121 is formed on each of the conductive bodies 120. That is, five positive electrodes and one negative electrode are formed on the medical catheter body, and five electrode pairs are formed on the medical catheter body.

Alternatively, the first and second conductive bodies 120a and 120b are arranged at intervals along the circumference of the catheter main body 110 such that the positive electrodes and the negative electrodes are alternately arranged, so that a plurality of pairs of electrodes are formed in the circumference of the medical catheter body to generate a shock wave in a range of 360 °. Alternatively, the positive electrodes and the negative electrodes are alternately arranged in the axial direction of the medical catheter body, so that a plurality of pairs of electrode pairs are formed in the axial direction of the medical catheter body, and a plurality of shock waves can be generated in the axial direction.

In a further preferred embodiment, the lengths of at least some of the conductive bodies 120 are unequal, so that the distal ends of at least some of the conductive bodies 120 end at different positions in the axial direction of the catheter body 110, i.e. the distal ends of at least some of the conductive bodies 120 are not flush. This is because the compliance of the medical catheter body is adversely affected when more electrical conductors 120 are embedded in the catheter body 110, and therefore, the length of each electrical conductor 120 is set according to actual needs, so that the distal end of the medical catheter body does not need to be provided with the electrical conductors 120 in the region where the electrodes 121 are not formed, thereby improving the compliance of the distal end of the medical catheter body.

In the present embodiment, the material of the catheter main body 110 and the conductor 120 is not particularly limited as long as the material of the catheter main body 110 is an insulating material and the material of the conductor 120 is a conductor. Useful materials for the catheter body 110 include, but are not limited to, at least one of polyimide, PEEK, polytetrafluoroethylene, polyvinylidene fluoride, polyamide polyether block copolymer, polyethylene, polyamide, polyester. Useful materials for the electrical conductor 120 include, but are not limited to, at least one of platinum, iridium, tungsten, copper, silver, stainless steel, nickel, titanium, and the like.

The medical catheter body can be manufactured in a layered and heat-shrinkable combination manner. Specifically, the catheter body 110 includes an inner body and an outer body. In practice, the inner tube is provided first, and then the proximal end of the conductive body 120 is wrapped around the outer surface of the inner tube, and the distal end of the conductive body 120 extends along the axial direction of the inner tube. The outer tube is then sleeved over the outer surface of the inner tube and completely covers the electrical conductor 120. And then sleeving a heat shrinkable tube on the outer surface of the outer tube body. The heat shrink tubing is then heated to join the outer tube with the inner tube. And finally removing the heat shrinkable tube. It can be understood that the outer tube has a through hole as the window 111.

Further, the present embodiment also provides a balloon catheter, as shown in fig. 4, the balloon catheter includes the medical catheter body and a balloon 200, the balloon 200 is sleeved on the outer surface of the distal end of the medical catheter body and covers the electrode (not shown in fig. 4). It is understood that the catheter main body 110 of the medical catheter body is further provided with a perfusion channel communicated with the balloon 200 for perfusing the balloon 200 with a filling agent.

When the balloon catheter is used for treating calcified lesions, the distal end of the balloon catheter is firstly guided into a lesion part along a blood vessel, and then an inflating agent is poured into the balloon 200 matched with the medical catheter body so as to expand the balloon. The bulking agent may be saline. Then, the first conductive body 120a and the second conductive body 120b are respectively connected to the positive and negative electrodes of the pulse generator 300, so that at least one pair of the electrode pairs is formed on the medical catheter body. An electrical signal is then transmitted to the electrode pair using the pulse generator 300, causing the electrode pair to generate a shock wave that propagates along the bulking agent and acts on the calcified plaque. The electrode pairs on the medical catheter body generate shock waves at intervals under the action of the pulse generator 300 until the calcified plaque is disintegrated and broken.

Still further, the present embodiment also provides a medical device, as shown in fig. 5, which includes the balloon catheter and the pulse generator 300.

< example two >

Referring to fig. 6, the difference between the present embodiment and the first embodiment is that the conductive body 120 is wound around the axis of the catheter main body 110 in a spiral structure over the entire axial length of the catheter main body 110. Compared with the first embodiment, the medical catheter body provided by the embodiment has better flexibility.

< example three >

Referring to fig. 7 and 8, the difference between the present embodiment and the first embodiment is that the exposed area of the positive electrode is larger than that of the negative electrode, and the negative electrode with a smaller exposed area can enhance the energy of the shock wave. The exposed area here refers to the area of the partial surface of each electrode 121 that is visible to the outside through the window 111, i.e., the area of the partial surface of each electrode 121 that faces the outside of the medical catheter body.

In an alternative implementation manner, the cross section of the first conductive body 120a is rectangular, the cross section of the second conductive body 120b is circular, and the area of the cross section of the second conductive body 120b is smaller than that of the cross section of the first conductive body 120a, so that the exposed area of the negative electrode is smaller than that of the positive electrode.

It should be understood that the present embodiment has no particular limitation on the shape of the cross section of the conductive body 120, which may be rectangular, circular, semicircular, or other shapes.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A medical catheter body is characterized by comprising a catheter main body and an electric conductor; a window is formed on the outer surface of the catheter main body; the electrical conductor is embedded within the wall of the catheter body and at least partially surrounds the axis of the catheter body to form a helical structure, and a portion of the electrical conductor is exposed at the window to form an electrode.

2. The medical catheter body as set forth in claim 1, wherein at least two of said windows are formed in said catheter body; the number of the electric conductors is at least two, and the electrodes formed by at least two electric conductors are used for forming at least one pair of electrode pairs.

3. The medical catheter body as claimed in claim 1 or 2, wherein a portion of each of the electrical conductors is formed in the spiral configuration, and another portion is formed in a linear configuration extending in an axial direction of the catheter body.

4. The medical catheter body according to claim 1 or 2, wherein each of the electrical conductors is formed in the spiral-shaped configuration over the entire length in the axial direction of the catheter body.

5. The medical catheter body according to claim 2, wherein at least one of the electrical conductors is adapted to be connected to the positive electrode of the pulse generator such that the electrode formed thereby is a positive electrode; at least one electric conductor is used for being connected with the negative electrode of the pulse generator, so that the formed electrode is the negative electrode; the exposed area of at least one positive electrode at the window corresponding to the positive electrode is larger than that of at least one negative electrode at the window corresponding to the negative electrode.

6. The medical catheter body of claim 2, wherein the window is disposed at the distal end of the catheter body, and the distal ends of at least some of the electrical conductors terminate at different locations in the axial direction of the catheter body.

7. The medical catheter body according to claim 2, wherein at least one of the electrical conductors is adapted to be connected to the positive electrode of the pulse generator such that the electrode formed thereby is a positive electrode; at least one electric conductor is used for being connected with the negative electrode of the pulse generator, so that the formed electrode is the negative electrode; the positive electrodes and the negative electrodes are alternately arranged in a circumferential direction and/or an axial direction of the catheter body.

8. The medical catheter body according to claim 1, wherein the catheter body comprises an inner tube and an outer tube, and the outer tube is provided with a through hole as the window; the electrical conductor is disposed between the inner tube and the outer tube.

9. A balloon catheter comprising a medical catheter body according to any one of claims 1-8 and a balloon that fits over the medical catheter body and covers the electrodes.

10. A medical device comprising a balloon catheter according to claim 9 and a pulse generator for connection to the electrical conductor to transmit an electrical signal to the electrode and cause the electrode to generate a shockwave.

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