CN215961737U

CN215961737U - Quick-exchange type pulse balloon catheter

Info

Publication number: CN215961737U
Application number: CN202121775375.7U
Authority: CN
Inventors: 汪立; 张晨朝; 马盛淞; 梁鑫峰; 蔡涛; 王君毅
Original assignee: Shanghai Baixin'an Biotechnology Co ltd
Current assignee: Shanghai Baixin'an Biotechnology Co ltd
Priority date: 2021-07-31
Filing date: 2021-07-31
Publication date: 2022-03-08
Anticipated expiration: 2031-07-31

Abstract

The utility model relates to the field of medical instruments, in particular to a rapid exchange type pulse balloon catheter. A rapid exchange type pulse balloon catheter comprising a balloon; one end of the outer tube is connected with the near end of the balloon, and the outer tube at least comprises a transition tube in a spiral corrugated shape; the inner tube, the one end of inner tube extends into in the sacculus and runs through the sacculus, the inner tube is coaxial with the outer tube, be used for holding the guide wire in the inner tube, the wall fills the chamber between outer tube, sacculus and the inner tube. The inventor can better connect the outer pipes with different hardnesses by arranging a part of the spiral corrugated transition pipe in the outer pipe, and when the spiral corrugated transition pipe is in a gradual structure, namely the pitch of the spiral corrugated transition pipe is gradually increased from the far end to the near end. The inner space of the outer tube can be saved, and when the liquid is filled into the saccule, the volume of the liquid flowing into the saccule in the same time is larger, so that the pressurizing time and the pressure relief time of the saccule are greatly shortened.

Description

Quick-exchange type pulse balloon catheter

Technical Field

The utility model relates to the field of medical instruments, in particular to the technical field of classification number A61M, and more particularly relates to a rapid exchange type pulse balloon catheter.

Background

For diseases such as calcification of blood vessels, stenosis and blockage in blood vessels, a balloon catheter is usually used to intervene in vivo for treatment, and the existing balloon catheter is generally provided with a transition section for improving the connection strength between the balloon and an outer tube. Patent publication No. CN210159074U discloses a balloon catheter structure with a stent for a blood vessel dilatation operation, which comprises an inner tube, a Y-shaped connecting piece, a balloon and a restraining stent, wherein the restraining stent is wrapped outside the balloon and further comprises a transitional connecting tube and a braided tube. Patent publication No. CN110478601A discloses a balloon catheter that is a rapid exchange structure and has a balloon catheter body with a push member, a transition member, a balloon loading member including an outer tube and an inner tube, a balloon, visualization markers, and a tip, and a handle, the distal end of the transition member being nested inside the proximal end of the outer tube of the balloon loading member. Patent publication No. CN202961470U discloses a balloon dilatation catheter, which comprises a tail end catheter, a transition section catheter, a proximal end catheter and a handle which are connected in sequence.

Also, in the prior art, a balloon catheter as shown in fig. 1 is used, a central wire is fixed inside the balloon catheter as shown in fig. 2, the strength of the transition sections is improved by connecting the central wire, the available space inside the catheter is reduced by the arrangement of the transition sections, the remaining space inside the catheter is too small, the pressurizing and pressure releasing time of the balloon is greatly increased, and the pressurizing and pressure releasing of the balloon are difficult to complete within a specified time.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a rapid exchange type pulse balloon catheter, comprising a balloon; one end of the outer tube is connected with the near end of the balloon, and the outer tube at least comprises a transition tube in a spiral corrugated shape; the inner tube, the one end of inner tube extends into in the sacculus and runs through the sacculus, the inner tube is coaxial with the outer tube, be used for holding the guide wire in the inner tube, enclose between outer tube, sacculus and the inner tube and become and fill the chamber.

Preferably, the pitch of the transition tube increases from the distal end to the proximal end.

As a preferred technical scheme, the outer tube further comprises a first connecting tube and a second connecting tube connected to two ends of the transition tube, one end of the first connecting tube is connected with the near end of the balloon, and the first connecting tube and the second connecting tube are both straight tubes.

Because the first connecting pipe and the saccule are close to each other and need to intervene in a human body, the first connecting pipe and the saccule need to be made of a softer polymer material, such as polyether block polyamide, damage to human organs or blood vessels due to over-hardness of the first connecting pipe is avoided, the second connecting pipe is close to the near end, a powerful support needs to be provided in the process of conveying the saccule into the human body, and the saccule is generally made of a polymer material with high hardness and mechanical properties, such as polyethylene terephthalate. However, due to the difference between the materials of the first connecting pipe and the second connecting pipe and the difference between the mechanical strength and the hardness, when the first connecting pipe is directly connected with the second connecting pipe, the transition at the joint is easily uneven, which results in the fracture at the joint. The inventor finds that when the transition pipe in the spiral corrugated shape is connected between the first connecting pipe and the second connecting pipe, the acting force between the first connecting pipe and the second connecting pipe can be better received, the transition pipe is made of a high polymer material, such as polydodecalactam (PA12), and when the transition pipe in the spiral corrugated shape is in a gradually-changed structure, that is, when the screw pitch of the transition pipe in the spiral corrugated shape gradually increases from the far end to the near end, the first connecting pipe and the second connecting pipe can be better connected. Because the hardness that the screw pitch along with the transition pipe of spiral corrugate is bigger and bigger promotes thereupon, through the screw pitch that reduces the transition pipe, can realize that the distal end of transition pipe is softer, can be better with first connecting pipe be connected, the screw pitch through increase transition pipe can realize that the near-end of transition pipe is harder, can be better with the second connecting pipe be connected. And a metal lead for rigid transition does not need to be arranged in the outer tube, so that the inner space of the outer tube is saved. When the saccule is filled with liquid, the volume of the liquid flowing into the saccule in the same time is larger, so that the pressurizing time and the pressure relief time of the saccule are greatly shortened.

As a preferred solution, the proximal end of the inner tube extends from one side of the outer tube into the balloon.

A port of the inner tube is provided at a portion of the balloon close to the outer tube, and the inner tube is an inlet for guiding a guide wire. The length of the guide wire passing inside the outer tube is reduced, thereby reducing the resistance of the guide wire to pass inside the outer tube.

As a preferable technical scheme, the balloon-type blood vessel further comprises a pulse device, wherein the pulse device comprises N pulse electrodes arranged in the balloon and N leads respectively connected with the N pulse electrodes, each lead penetrates through the outer tube and is connected with one corresponding pulse electrode, and N is larger than or equal to 1.

The pulse electrode generates pulse, and the pulse is transmitted through the electrolyte to drive the saccule to vibrate and puncture the calcified area of the blood vessel, so as to treat the aortic calcification disease.

As a preferred solution, there may be 1, 2, 3, 4, 5, 6, 7 or 8 pulse electrodes.

As a preferable technical scheme, the pulse electrode comprises a first pulse electrode, a second pulse electrode, a first lead connected with the first pulse electrode, and a second lead connected with the second electrode, and the first pulse electrode and the second pulse electrode are both mounted on the outer wall of the inner tube in the balloon.

As a preferred technical scheme, the balloon comprises a balloon body, a first conical part connected to the proximal end of the balloon body and a second conical part connected to the distal end of the balloon body.

As a preferred technical scheme, the included angle between the first conical part and the balloon body is 135-165 degrees.

As a preferred technical solution, the included angle between the first conical part and the balloon body is 140 °.

As a preferable technical scheme, the included angle between the second conical part and the balloon body is 135-165 degrees.

As a preferred technical solution, the included angle between the second conical part and the balloon body is 140 °.

The included angle between the first conical part and the second conical part and the balloon is set to be 140 degrees, so that the smoothness of the balloon in vivo transportation can be improved.

The near end in the technical scheme is the end close to a doctor when the balloon catheter is sent into a human body, and the far end is the end far away from the human body.

Has the advantages that:

(1) the inventor can better connect the outer pipes with different hardnesses by arranging a part of the spiral corrugated transition pipe in the outer pipe, and when the spiral corrugated transition pipe is in a gradual structure, namely the pitch of the spiral corrugated transition pipe is gradually increased from the far end to the near end. Because the hardness that the screw pitch along with the transition pipe of spiral corrugate is bigger and bigger promotes thereupon, through the screw pitch that reduces the transition pipe, can realize that the distal end of transition pipe is softer, can be better with the outer tube distal end be connected, can realize through the screw pitch that increases the transition pipe that the near-end of transition pipe is harder, can be better with the near-end of outer tube be connected. And a metal lead for rigid transition does not need to be arranged in the outer tube, so that the inner space of the outer tube is saved. When the saccule is filled with liquid, the volume of the liquid flowing into the saccule in the same time is larger, so that the pressurizing time and the pressure relief time of the saccule are greatly shortened.

(2) A port of the inner tube is provided at a portion of the balloon close to the outer tube, and the inner tube is an inlet for guiding a guide wire. The length of the guide wire passing inside the outer tube is reduced, thereby reducing the resistance of the guide wire to pass inside the outer tube.

Drawings

Fig. 1 is a schematic overall structure diagram of a conventional rapid exchange type pulse balloon catheter in the background art.

Fig. 2 is a schematic sectional view of the end portion of the central wire in fig. 1.

Fig. 3 is a schematic view of the entire structure in embodiment 1.

FIG. 4 is a schematic structural view of a section A-A in example 1.

FIG. 5 is a schematic structural view of a section B-B in example 1.

The balloon comprises an inner tube 1, a balloon body 2, a first conical part 3, a second conical part 4, a transition tube 5, a first connecting tube 6, a second connecting tube 7, a first pulse electrode 8, a second pulse electrode 9, a first lead 10 and a second lead 11.

Detailed Description

Example 1

As shown in fig. 3-5, the utility model provides a rapid exchange type pulse balloon catheter, which comprises a balloon, an outer tube connected with the balloon, an inner tube 1 penetrating through the middle part of the balloon, and a pulse electrode arranged inside the balloon. The balloon comprises a balloon body 2, a first conical part 3 connected to the proximal end of the balloon body 2, and a second conical part 4 connected to the distal end of the balloon body 2. The included angle between the first conical part 3 and the balloon body 2 is 140 degrees, the included angle between the second conical part 4 and the balloon body 2 is 140 degrees, and the smoothness of the balloon in-vivo transportation can be improved by setting the included angle between the first conical part and the second conical part and the balloon to 140 degrees. The outer tube is connected in the first connecting pipe 6 and the second connecting pipe 7 at transition pipe 5 both ends including the transition pipe 5 that is spiral corrugate, the one end of first connecting pipe 6 is connected with the first toper portion 3 of sacculus, first connecting pipe 6 and second connecting pipe 7 are the straight tube, the pitch of transition pipe 5 is crescent from the distal end to the near-end. The near end of the inner tube 1 extends into the balloon from one side of the first connecting tube 6 and penetrates through the balloon, the inner tube 1 is coaxial with the outer tube, the inner tube 1 is used for containing a guide wire, a perfusion cavity is formed among the outer tube, the balloon and the inner tube 1 in a surrounding mode, and liquid is filled into the perfusion cavity, so that the balloon is expanded. The pulse electrodes comprise a first pulse electrode 8, a second pulse electrode 9, a first lead 10 connected with the first pulse electrode 8 and a second lead 11 connected with the second pulse electrode 9, and the first pulse electrode 8 and the second pulse electrode 9 are both arranged on the outer wall of the inner tube 1 in the balloon. The pulse electrode generates pulse, and the pulse is transmitted through the electrolyte to drive the saccule to vibrate and puncture the calcified area of the blood vessel, so as to treat the aortic calcification disease. When the transition pipe 5 that is the spiral corrugate is connected between first connecting pipe 6 and second connecting pipe 6 in the use, can be better accept the effort between first connecting pipe 6 and the second connecting pipe 7, and when the transition pipe 5 of spiral corrugate is the structure of gradual change, when the screw pitch of the transition pipe 5 of spiral corrugate increases gradually from the distal end to the near-end promptly, first connecting pipe 6 of connection and second connecting pipe 7 that can be better. In this embodiment, the first connecting pipe is made of polyether block polyamide, and the grades of the polyether block polyamide are as follows: ArkemaPebax 2533, the second connecting pipe is made of polyethylene terephthalate, and the polyethylene terephthalate is made of polyethylene terephthalate with the brand number: dupont PET FR530 NC010, the material of transition pipe is polydodecalactam, polydodecalactam's trade mark is: swiss EMS GTR45 PA 12. Because the hardness of transition pipe 5 promotes thereupon along with the screw pitch of the transition pipe 5 of spiral corrugate is bigger and bigger, through reducing the screw pitch of transition pipe 5, can realize that the distal end of transition pipe 5 is softer, with first connecting pipe 6 can be better be connected, can realize through the screw pitch of increase transition pipe 5 that the proximal end of transition pipe 5 is harder, with second connecting pipe 7 can be better be connected. And a metal lead for rigid transition does not need to be arranged in the outer tube, so that the inner space of the outer tube is saved. When the saccule is filled with liquid, the volume of the liquid flowing into the saccule in the same time is larger, so that the pressurizing time and the pressure relief time of the saccule are greatly shortened.

Claims

1. A rapid exchange type pulse balloon catheter is characterized by comprising a balloon; one end of the outer tube is connected with the near end of the balloon, and the outer tube at least comprises a transition tube in a spiral corrugated shape; the inner tube, the one end of inner tube extends into in the sacculus and runs through the sacculus, the inner tube is coaxial with the outer tube, be used for holding the guide wire in the inner tube, enclose between outer tube, sacculus and the inner tube and become and fill the chamber.

2. The rapid exchange pulse balloon catheter according to claim 1, wherein the transition tube has a pitch that gradually increases from the distal end to the proximal end.

3. The rapid exchange type pulse balloon catheter according to claim 1, wherein the outer tube further comprises a first connecting tube and a second connecting tube respectively connected to two ends of the transition tube, one end of the first connecting tube is connected to the proximal end of the balloon, and the first connecting tube and the second connecting tube are both straight tubes.

4. The rapid exchange pulse balloon catheter according to claim 1, wherein the proximal end of the inner tube extends into the balloon from one side of the outer tube.

5. The rapid exchange type pulse balloon catheter according to any one of claims 1 to 4, further comprising a pulse device, wherein the pulse device comprises N pulse electrodes installed in the balloon, N leads respectively connected with the N pulse electrodes, each lead is connected with a corresponding pulse electrode through the outer tube, and N is larger than or equal to 1.

6. The rapid exchange pulse balloon catheter according to claim 5, wherein the number of pulse electrodes may be 1, 2, 3, 4, 5, 6, 7 or 8.

7. The rapid exchange type pulse balloon catheter according to claim 5, wherein the pulse electrodes comprise a first pulse electrode, a second pulse electrode, a first lead connected to the first pulse electrode, and a second lead connected to the second electrode, the first pulse electrode and the second pulse electrode being mounted on an outer wall of the inner tube located in the balloon.

8. The rapid exchange pulsing balloon catheter of claim 1 wherein the balloon comprises a balloon body, a first tapered portion connected to a proximal end of the balloon body, a second tapered portion connected to a distal end of the balloon body.

9. The rapid exchange pulse balloon catheter according to claim 8, wherein the angle between the first tapered portion and the balloon body is 135 ° -165 °.

10. The rapid exchange pulse balloon catheter according to claim 9, wherein the angle between the first taper and the balloon body is 140 °.