CN119327013A

CN119327013A - A balloon dilatation catheter for liver and gallbladder

Info

Publication number: CN119327013A
Application number: CN202411444022.7A
Authority: CN
Inventors: 徐龙; 徐靖达; 娄婷
Original assignee: Shenzhen University
Current assignee: Shenzhen University
Priority date: 2024-10-16
Filing date: 2024-10-16
Publication date: 2025-01-21

Abstract

The application discloses an air sac dilating catheter for liver and gall, which comprises an outer tube body, an inner tube body, a folding balloon and a plurality of cutting wires, wherein the inner tube body is inserted into the outer tube body, one side of the folding balloon is fixed at the distal end of the outer tube body, the other side of the folding balloon is fixed at the distal end of the inner tube body, the cutting wires are arranged at the periphery of the folding balloon and extend along the axial direction of the folding balloon, and the folding balloon is expanded or contracted in the short side direction by providing fluid pressure through the outer tube body so as to make the cutting wires stand out from the folding balloon or be accommodated in the folding balloon. The balloon dilation catheter for the liver and gall can be used by adjusting the use method according to the actual condition of the biliary stricture, can independently realize the operations of dilating the biliary stricture and cutting the biliary stricture, is convenient to operate and use, reduces the replacement times of instruments in the operation, shortens the operation time and relieves the pain of patients.

Description

Balloon dilation catheter for liver and gall

Technical Field

The application relates to the technical field of medical instruments, in particular to an air sac dilating catheter for liver and gall.

Background

Bile duct stenosis is a biliary lumen scar constriction due to bile duct injury and recurrent cholangitis or congenital.

Common diseases such as cholecystitis, cholecystolithiasis, bile duct calculus and the like cause inflammation in the inner cavity of the bile duct, and repeated attacks of inflammation cause fibrous tissue hyperplasia of the wall of the bile duct, and the thickening and inward expansion cause the fibrous tissue hyperplasia. Bile duct stenosis can lead to blockage of bile drainage, increased intra-biliary pressure, cholestasis. Can cause secondary bile duct stones, cholangitis, gram negative enterobacteria infection and other damages for a long time. The repeated attack of inflammation for a long time can aggravate the damage of gall bladder and the damage of liver cells, so that the gall bladder necrosis or liver cirrhosis can be caused, and serious diseases such as gall bladder cancer or liver cancer can be caused seriously. Surgery requires bile duct molding surgery to relieve obstruction, increasing risk and burden. While endoscopic treatment has the advantage of simplicity, repeatability and minimal trauma, therapeutic ERCP has been widely used for the treatment of both recent and distant bile duct stenosis.

ERCP (endoscopic retrograde cholangiopancreatography) is a contrast technique of injecting a photographic agent under an endoscope through a duodenal papilla cannula so as to retrograde display the cholangiopancreatography, and is a currently accepted gold standard for diagnosing cholangiopancreatography. Based on ERCP, can carry out six technologies of duodenal papillary sphincterotomy (EST), duodenal papillary saccule dilatation, bile duct calculus lithotripsy and lithotomy, common bile duct stent implantation and nasal biliary duct drainage, and the hospitalization time is greatly shortened because of no need of operation and small trauma, and is popular with patients.

EST is a treatment technology which is further developed on the basis of the diagnostic technology of endoscopic retrograde cholangiopancreatography (hereinafter referred to as ERCP), and is used for incising the tail end parts of the duodenal papilla sphincter and the common bile duct under the endoscope by using a high-frequency electric incision knife. EST is an important treatment technology in the field of endoscopy, and is also a precondition for other endoscopic treatments of pancreatic bile duct lesions, such as bile duct calculus extraction, bile duct stenosis dilatation, biliary duct bracket internal drainage, bile duct tumor biopsy, radioactive source implantation internal irradiation and other diagnosis technologies.

Balloon dilation catheters are mainly used for dilation of digestive tract strictures, especially benign strictures. The balloon catheter for biliary tract is mainly used for dilating duodenal papilla, dilating treatment of biliary tract stenosis and removing choledocholithiasis, and can be inserted into biliary tract for related dilating treatment after papilla is cut, and can be used together to effectively treat biliary tract stenosis.

The current operation technology is that an independent papillary incision operation is used for performing papillary sphincterotomy, a guide wire is arranged in a bile duct, then the guide wire is reserved, the incision operation is withdrawn, a balloon catheter is arranged along the guide wire and passes through the narrow part of the bile duct, the balloon catheter is withdrawn after the ideal expansion diameter is reached, and the guide wire is reserved in the bile duct.

For intractable stenosis, it is difficult to spread the stenosis after the above treatment, and then a cutter is fed into the biliary tract along the guide wire, and then the papilla is incised. And the operation needs multiple instruments and multiple steps, the operation is complicated, the operation time is long, and when the instruments are replaced, the guide wire needs to be inserted again due to the problem of misoperation, and meanwhile, the pain and intolerance of a patient are increased due to the prolonged time. Therefore, the operation defects are that the material consumption is high, the cost is high, the medical burden of a patient is heavy and the like, meanwhile, a plurality of steps are needed for operation, the time and the cost are consumed, the efficiency is low, and the occurrence rate of complications is increased.

Accordingly, the prior art is in need of improvement.

Disclosure of Invention

The application aims to provide an air sac dilating catheter for liver and gall, and aims to solve the technical problem of how to provide an air sac dilating catheter capable of dilating and incising a narrow bile duct in the prior art.

In order to achieve the above purpose, the application adopts the following technical scheme:

The application provides a balloon dilation catheter for liver and gall, which comprises the following components:

An outer tube body;

The inner pipe body is inserted into the outer pipe body;

A folding balloon, one side of which is fixed at the distal end of the outer tube, and the other side of which is fixed at the distal end of the inner tube;

The cutting wires are arranged on the periphery of the folding balloon and extend along the axial direction of the folding balloon, and the folding balloon is expanded or contracted in the short side direction by the pressure of fluid provided by the outer tube body, so that the cutting wires are highlighted on the folding balloon or are contained in the folding balloon.

Through the scheme, the balloon dilation catheter for the liver and gall can be used according to the actual conditions of bile duct stenosis, can independently realize the operations of dilating the bile duct stenosis and cutting the bile duct stenosis, is convenient to operate and convenient to use, reduces the replacement times of instruments in operation, shortens the operation time, and relieves the pain of patients.

In one embodiment, the folding balloon comprises a plurality of consecutively connected folds, the cutting wire being disposed within the folds.

According to the scheme, the folding balloon is expanded or contracted through the folding body, when the folding body is expanded, the cutting wire can be expanded and protruded out of the folding balloon, at the moment, the bile duct balloon dilatation operation can be carried out through the folding balloon to expand the diameter of a narrow part, or the cutting wire is connected with high-frequency electricity to realize the cutting of the narrow part, when the folding body is contracted, the cutting wire can be wrapped and withdrawn from the catheter, the operation is convenient, the use is convenient, and the instrument replacement times can be reduced in an operation.

In one embodiment, the folded body includes a first fold surface, a second fold surface, and a concave fold axis connected to the first fold surface and the second fold surface, the cutting wire being secured to the concave fold axis.

Through the scheme, when the folding balloon is contracted, the first folding surface and the second folding surface can store the cutting wire, and when the folding balloon is expanded, the first folding surface and the second folding surface can drive the cutting wire to move radially outwards, so that the cutting wire is highlighted on the folding balloon.

In one embodiment, the method further comprises:

The developing ring is arranged on the inner tube body and positioned in the folding balloon.

Through the scheme, the developing ring can display the position of the folding saccule, so that the balloon dilating catheter for liver and gall can be pushed to reach bile duct stenosis.

In one embodiment, the outer tubular body includes an energizing wire connected to the cutting wire.

Through above-mentioned scheme, the power-on silk is connected with the cutting wire, when needs cutting wire cut, the power-on silk can connect high-frequency electricity, cuts biliary stricture through high-frequency electricity, and cutting speed is fast to need not to change the apparatus, the simple operation can alleviate patient's misery.

In one embodiment, the energizing wire extends to the inner tube and the energizing wire is connected to the cutting wire through the inner tube.

Through above-mentioned scheme, the cutting wire can be connected with the power on silk of outer body through the power on silk on the interior body, when needs cutting the wire and cuts, the power on silk can connect high-frequency electricity, cuts biliary stricture through high-frequency electricity, and cutting speed is fast to need not to change the apparatus, the simple operation can alleviate patient's misery.

In one embodiment, the cutting wire comprises one of the following structures:

titanium alloy wires or stainless steel wires.

Through the scheme, the high-frequency high-voltage current can be generated by passing through the high-frequency electricity through the titanium alloy electric wire and the stainless steel electric wire, so that tissues are gasified or coagulated, and the purposes of cutting and hemostasis are achieved. It has the advantages of simple operation, high cutting speed, good hemostatic effect, etc.

In one embodiment, the cutting wire connection is provided with an insulating coating, through which the cutting wire is connected with the folding balloon.

Through above-mentioned scheme, cutting wire deviates from folding sacculus one side and is effective cutting part, and cutting wire and folding sacculus butt one side can be provided with insulating coating, effectively keeps apart the electric current through insulating coating, plays protection and insulating effect.

In one embodiment, the number of the cutting wires is 3-12, and the cutting wires are uniformly arranged at intervals in the circumferential direction of the folding balloon.

Through above-mentioned scheme, folding sacculus utilizes many cutting wires can open a plurality of circumference distribution's incision at bile duct stenosis to expand bile duct stenosis, can make the tissue tear more orderly controllable through less pressure.

In one embodiment, the method further comprises:

the handle comprises a high-frequency electrode, and the high-frequency electrode is used for being connected with the electrified wire.

Through above-mentioned scheme, the handle is provided with the high frequency electrode, and the high frequency electrode is used for being connected with the electrified silk on the outer body, connects the high frequency electricity on the high frequency electrode, can make cutting wire electrified, can cut bile duct stenosis in the operation.

The balloon dilation catheter for liver and gall has the beneficial effects that:

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a balloon dilation catheter for liver and gall according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an assembly structure of a folded body and a cutting wire according to an embodiment of the present application;

FIG. 3 is a schematic view showing an assembled structure of a folded body and a cutting wire according to an embodiment of the present application;

fig. 4 is a schematic view of a folded state of a folded balloon according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a connection structure between a cutting wire and an energizing wire according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a connection structure between a cutting wire and an inner tube according to an embodiment of the present application;

FIG. 7 is a schematic view of a connection structure between a cutting wire and a folded balloon according to an embodiment of the present application;

fig. 8 is a schematic diagram of a connection structure between a balloon dilation catheter for liver and gall and a handle according to an embodiment of the present application.

Wherein, each reference sign in the figure:

100. The medical balloon comprises an outer tube body, 200 parts of an inner tube body, 300 parts of a folding balloon, 400 parts of a cutting wire, 500 parts of a developing ring, 600 parts of a handle, 700 parts of a bile duct stenosis, 110 parts of an energizing wire, 120 parts of a first pipeline, 210 parts of a second pipeline, 310 parts of a folding body, 311 parts of a first folding surface, 312 parts of a second folding surface, 313 parts of a concave folding axis, 410 parts of an insulating coating, 610 parts of a high-frequency electrode.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are directions or positions based on the drawings, and are merely for convenience of description and are not to be construed as limiting the present technical solution. The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.

Bile duct balloon dilation is an interventional procedure for treating biliary tract disorders. The procedure restores normal flow of bile by advancing the balloon to the site of the bile duct stenosis 700 or obstruction, and then dilating the stenosed or obstructed bile duct by inflation. For benign stricture, the bile duct can be dilated generally by bile duct balloon dilatation, but for intractable stricture, the bile duct stricture 700 or the blocked part is also required to be cut to realize dredging of the bile duct stricture 700, so that the problems of long operation time consumption and the like caused by the need of replacing a high-frequency electrotome instrument are caused.

Therefore, the application provides the balloon dilation catheter for liver and gall, which has the functions of dilation and electrotome, reduces the frequency of instrument replacement in operation, shortens the operation time, has simple and convenient operation, high cutting speed and good hemostatic effect, and relieves the pain of patients.

Referring to fig. 1, the present embodiment provides a balloon dilation catheter for liver and gall, which comprises an outer tube 100, an inner tube 200, a folding balloon 300 and a plurality of cutting wires 400, wherein the inner tube 200 is inserted into the outer tube 100, one side of the folding balloon 300 is fixed at the distal end of the outer tube 100, the other side of the folding balloon 300 is fixed at the distal end of the inner tube 200, the cutting wires 400 are arranged on the periphery of the folding balloon 300 and extend along the axial direction of the folding balloon 300, and the folding balloon 300 is dilated or contracted in the short side direction by the pressure of fluid supplied by the outer tube 100, so that the cutting wires 400 are highlighted on the folding balloon 300 or accommodated in the folding balloon 300.

In this embodiment, the cutting wire 400 is disposed on the outer periphery of the folding balloon 300, the folding balloon 300 has a contracted state and an expanded state, when the folding balloon 300 is in the contracted state, the folding balloon 300 can wrap the cutting wire 400 so that the cutting wire 400 is accommodated in the folding balloon 300, when the folding balloon 300 is expanded by pressurizing the outer tube 100, the cutting wire 400 is highlighted on the outer surface of the folding balloon 300, at this time, the folding balloon 300 can expand the bile duct stenosis 700 so as to expand the diameter of the stenosis part, thereby restoring the normal flow of bile, namely realizing the endoscopic bile duct balloon dilatation.

Therefore, the balloon dilation catheter for liver and gall can be used according to the actual condition of the bile duct stenosis 700, and can be used for independently realizing the operations of dilating the bile duct stenosis 700 and cutting the bile duct stenosis 700, so that the operation is convenient, the use is convenient, the instrument replacement times are reduced in the operation, the operation time is shortened, and the pain of a patient is relieved.

Specifically, referring to fig. 2 and 3, the folding balloon 300 includes a plurality of continuously connected folding bodies 310, and cutting wires 400 are disposed in the folding bodies 310.

In this embodiment, the folding balloon 300 is expanded or contracted by the folding body 310, when the folding body 310 is expanded, the cutting wire 400 can be expanded and protruded outside the folding balloon 300, at this time, the bile duct balloon dilatation operation can be performed by the folding balloon 300 to expand the diameter of the stricture site, or the cutting wire 400 is connected with high-frequency electricity to realize the cutting of the stricture site by the cutting wire 400, when the folding body 310 is contracted, the cutting wire 400 can be wrapped and withdrawn from the catheter, the operation is convenient, the use is convenient, and the instrument replacement frequency can be reduced in the operation.

Specifically, referring to fig. 3 and 4, the folded body 310 includes a first folded surface 311, a second folded surface 312, and a concave folded axis 313, the concave folded axis 313 is connected to the first folded surface 311 and the second folded surface 312, and the cutting wire 400 is fixed to the concave folded axis 313.

In this embodiment, the folding body 310 is used for expanding and contracting the folding balloon 300, the specific structure of the folding body 310 can be in various manners, the folding balloon 300 is expanded by pressurization or contracted by decompression, and at the same time, the folding body 310 performs corresponding expansion or contraction movement, in this embodiment, the cutting wire 400 performs cutting by high-frequency electricity, so that the folding balloon 300 is not required to provide cutting pressure, the operation is extremely simple, the cutting speed is high, meanwhile, the occupied space of the cutting wire 400 is small, the expansion and contraction of the folding balloon 300 can be facilitated to a certain extent, and the folding movement of the folding balloon 300 is not interfered. For example, the folded body 310 includes a first folding surface 311, a second folding surface 312, and a concave folding axis 313, the first folding surface 311 and the second folding surface 312 are folded by the concave folding axis 313, which is equivalent to folding the folded balloon 300 in a long side direction, the first folding surface 311 and the second folding surface 312 are both folded around the concave folding axis 313, and the folded balloon 300 is in a short side direction, a plurality of folding lines may be disposed to radially expand or contract the folded balloon 300, where the cutting wire 400 is fixed to the concave folding axis 313, that is, the cutting wire 400 extends along the axial direction of the folded balloon 300, and when the folded balloon 300 is contracted, the first folding surface 311 and the second folding surface 312 may receive the cutting wire 400, and when the folded balloon 300 is expanded, the first folding surface 311 and the second folding surface 312 may drive the cutting wire 400 to radially move outwards, so that the cutting wire 400 is highlighted on the folded balloon 300.

In particular, referring to fig. 5 and 6, the outer tube 100 includes an energizing wire 110, the energizing wire 110 being connected to a cutting wire 400.

In this embodiment, the power wire 110 is connected with the cutting wire 400, when the cutting wire 400 is needed to cut, the power wire 110 can be connected with high-frequency electricity, the bile duct stenosis 700 is cut by the high-frequency electricity, the cutting speed is high, the replacement of the instrument is not needed, the operation is convenient, and the pain of a patient can be relieved. For example, the power wire 110 may be embedded in the outer tube 100, and the power wire 110 is connected to an external power source through the outer tube 100.

In this embodiment, the folding balloon 300 has a proximal end and a distal end, the proximal end of the folding balloon 300 is connected to the outer tubular body 100, the distal end of the folding balloon 300 is connected to the inner tubular body 200, and the cutting wire 400 may be connected proximally to the energizing wire 110 on the outer tubular body 100.

Alternatively, the cutting wire 400 may be connected distally to the power wire 110 on the inner tube 200, and the power wire 110 on the inner tube 200 may be connected to the power wire 110 of the outer tube 100.

Optionally, the cutting wire 400 includes one of the following structures:

titanium alloy wires or stainless steel wires.

For example, the cutting wire 400 may comprise a titanium alloy wire, i.e., the cutting wire 400 is made of a titanium alloy, and the titanium alloy wire may generate high-frequency and high-voltage current when being electrified by high-frequency electricity, so that tissues are gasified or coagulated, thereby achieving the purposes of cutting and hemostasis. It has the advantages of simple operation, high cutting speed, good hemostatic effect, etc.

For example, the cutting wire 400 may comprise a stainless steel wire, i.e., the cutting wire 400 is made of stainless steel, and the stainless steel wire may generate high-frequency and high-voltage current by passing high-frequency electricity to gasify or coagulate tissue, thereby achieving the purposes of cutting and hemostasis. It has the advantages of simple operation, high cutting speed, good hemostatic effect, etc.

Specifically, referring to fig. 7, the cutting wire 400 is provided with an insulating coating 410 in connection therewith, and the cutting wire 400 is connected to the folding balloon 300 through the insulating coating 410.

In this embodiment, the side of the cutting wire 400 facing away from the folded balloon 300 is an effective cutting portion, and the side of the cutting wire 400 abutting against the folded balloon 300 may be provided with an insulating coating 410, and the insulating coating 410 effectively isolates current, thereby playing a role in protection and insulation. For example, a PTFE insulating coating 410 is provided on a side of the cutting wire 400 adjacent to the folding balloon 300, and the cutting wire 400 is connected to the folding balloon 300 through the PTFE insulating coating 410.

Specifically, referring to fig. 3, the number of cutting wires 400 is 3-12, and the cutting wires 400 are uniformly spaced apart in the circumferential direction of the folding balloon 300.

In this embodiment, the number of the cutting wires 400 is 3 to 12, and the cutting wires 400 are uniformly spaced apart in the circumferential direction of the folding balloon 300. For example, when the number of the cutting wires 400 is 3, which is equivalent to that 3 cutting wires 400 are circumferentially distributed on the folding balloon 300, the included angles of two adjacent cutting wires 400 are 120 °, when the folding balloon 300 is unfolded, and high-frequency electricity is applied to the cutting wires 400, the folding balloon 300 can open 3 circumferentially distributed incisions on the bile duct stenosis 700 by using the cutting wires 400, so as to dilate the bile duct stenosis 700, and the tissue tearing can be more orderly controlled by smaller pressure. For example, when the number of cutting wires 400 is 12, the bile duct stenosis 700 may be multi-position cut at the outer circumference of the folding balloon 300 in order to dilate and dredge the bile duct stenosis 700.

Alternatively, the height of the cutting wire 400 is 0.05-1mm and the width of the cutting wire 400 is 0.1-1mm.

In this embodiment, the cutting wire occupation space is little, can not influence the folding shrink motion of folding gasbag, and cutting wire cutting speed is fast simultaneously, efficient, and the simple operation can reduce operation time.

Specifically, referring to FIG. 8, the balloon dilation catheter for liver and gall also comprises a developing ring 500, wherein the developing ring 500 is arranged on the inner tube body 200 and is positioned in the folding balloon 300.

In this embodiment, the developing ring 500 may show the position of the folded balloon 300, so as to facilitate pushing the balloon dilation catheter for liver and gall to reach the bile duct stenosis 700, and the developing ring 500 may be understood as the prior art, and the structure of the developing ring 500 will not be repeated.

Specifically, referring to FIG. 8, the balloon dilation catheter for liver and gall also comprises a handle 600, the handle 600 comprising a high frequency electrode 610, the high frequency electrode 610 being adapted to be connected to an energizing wire 110.

In the present embodiment, the handle 600 is provided with a high-frequency electrode 610, and the high-frequency electrode 610 is used to be connected with the energizing wire 110 on the outer tube body 100, and the high-frequency electrode 610 is electrically connected with the high-frequency electrode, so that the cutting wire 400 can be electrified, and the bile duct stenosis 700 can be cut in the operation.

When the bile duct stenosis 700 is faced, the prior art cannot directly detect and distinguish benign stenosis or stubborn stenosis (benign stenosis refers to the fact that the diameter of a stenosis part can be enlarged through bile duct balloon dilatation, stubborn stenosis is the fact that the diameter of the stenosis part is difficult to be enlarged through bile duct balloon dilatation), so that the conclusion is drawn by firstly carrying out bile duct balloon dilatation and then judging, if the condition is stubborn, a high-frequency electrotome is required to be replaced for cutting and dilatation, the operation time is long, the working intensity of doctors is increased, and meanwhile the pain of patients is increased.

In this embodiment, the balloon dilation catheter for liver and gall bladder is pushed to the position of the bile duct stenosis 700 by the second pipe 210 of the inner pipe body 200 under the guiding action of the guide wire in the pushing process, and the balloon dilation catheter for liver and gall bladder is pushed out of the catheter to enable the folded balloon 300 to be positioned in the bile duct stenosis 700, then the folded balloon 300 is inflated through the first pipe 120 of the outer pipe body 100, the bile duct stenosis 700 is dilated, the pressure is relieved through the first pipe 120 of the outer pipe body 100 after the bile duct stenosis 700 reaches the ideal dilating diameter, the folded balloon 300 is contracted, if the intractable stenosis is not obtained, i.e. the bile duct stenosis 700 is still difficult to be dilated after the folded balloon 300 is contracted, at this time, the folded balloon 300 needs to be pushed again to be positioned at the position of the bile duct stenosis 700, then the folded balloon 300 is inflated through the first pipe 120 of the outer pipe body 100 again, and the cutting wire 400 is electrified, the cutting wire 400 is enabled to expand the bile duct stenosis 700, and the bile duct stenosis 700 is dilated, and the bile duct stenosis 700 is restored to the normal flowing position. After the bile duct stenosis 700 is dilated, pressure may be released through the first conduit 120 of the outer tubular body 100, such that the folding balloon 300 is contracted and withdrawn into the catheter, after which it is withdrawn by the second conduit 210 under the guidance of the guidewire.

In summary, the application discloses an air sac dilating catheter for liver and gall, which comprises an outer tube body, an inner tube body, a folding balloon and a plurality of cutting wires, wherein the inner tube body is inserted into the outer tube body, one side of the folding balloon is fixed at the distal end of the outer tube body, the other side of the folding balloon is fixed at the distal end of the inner tube body, the cutting wires are arranged on the periphery of the folding balloon and extend along the axial direction of the folding balloon, and the folding balloon is dilated or contracted in the short side direction by providing fluid pressure through the outer tube body so that the cutting wires are highlighted on the folding balloon or accommodated in the folding balloon. The balloon dilation catheter for the liver and gall can be used by adjusting the use method according to the actual condition of the biliary stricture, can independently realize the operations of dilating the biliary stricture and cutting the biliary stricture, is convenient to operate and use, reduces the replacement times of instruments in the operation, shortens the operation time and relieves the pain of patients.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims

1. A balloon dilation catheter for liver and gall comprising:

An outer tube body;

The inner pipe body is inserted into the outer pipe body;

2. The balloon dilation catheter for liver and gall of claim 1 wherein said folding balloon comprises a plurality of serially connected folds, said folds being internally provided with said cutting wires.

3. The balloon dilation catheter for liver and gall of claim 2 wherein said fold comprises a first fold surface, a second fold surface and a concave fold axis, said concave fold axis being connected to said first fold surface and said second fold surface, said cutting wire being secured to said concave fold axis.

4. The balloon dilation catheter for liver and gall as set forth in claim 1 further comprising:

5. The balloon dilation catheter for liver and gall of claim 1 wherein said outer tube includes an energizing wire, said energizing wire being connected to said cutting wire.

6. The balloon dilation catheter for liver and gall of claim 5 wherein said energizing wire extends to said inner tube and said energizing wire is connected to said cutting wire through said inner tube.

7. The balloon dilation catheter for liver and gall of claim 1 wherein said cutting wire comprises one of the following structures:

titanium alloy wires or stainless steel wires.

8. The balloon dilation catheter for liver and gall of claim 1 wherein said cutting wire is provided with an insulating coating, said cutting wire being connected to said folding balloon by said insulating coating.

9. The balloon dilation catheter for liver and gall of claim 1 wherein said number of cutting wires is 3-12 and said cutting wires are evenly spaced circumferentially about said folded balloon.

10. The balloon dilation catheter for liver and gall as set forth in claim 5 further comprising: