Air bag dilating catheter for liver and gall

Abstract

The balloon dilatation catheter comprises an outer catheter body, an inner catheter body, a folding balloon and a plurality of cutting electric wires, the inner catheter body is inserted into the outer catheter body in a penetrating mode, one side of the folding balloon is fixed to the far side end of the outer catheter body, and the other side of the folding balloon is fixed to the far side end of the inner catheter body; the cutting electric wire is arranged on the periphery of the folding balloon and roughly extends in the axial direction of the folding balloon, and the folding balloon expands or contracts in the short edge direction through fluid pressure provided by the outer tube body, so that the cutting electric wire protrudes out of the folding balloon or is contained in the folding balloon. According to the balloon dilating catheter for the liver and gall, the using method can be adjusted according to the actual situation of bile duct stenosis, bile duct stenosis dilating and bile duct stenosis cutting operation can be independently achieved, operation is convenient and fast, use is convenient, the number of times of instrument replacement in an operation is reduced, operation time is shortened, and pain of a patient is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to a balloon dilatation catheter for liver and gallbladder. Background Art

[0002] Biliary stricture is a narrowing of the bile duct lumen caused by scarring due to bile duct injury and recurrent cholangitis or congenitally.

[0003] Common diseases such as cholecystitis, cholelithiasis, and bile duct stones lead to inflammation in the bile duct lumen. Repeated inflammation causes the fibrous tissue of the bile duct wall to proliferate, thicken, and expand inward. Bile duct stenosis can lead to obstructed bile discharge, increased pressure in the bile duct, and bile stasis. Long-term exposure can lead to secondary bile duct stones, cholangitis, Gram-negative enteric bacilli infection, and other hazards. Long-term and repeated inflammation will eventually aggravate gallbladder damage and liver cell damage, leading to gallbladder necrosis or cirrhosis, and severe cases can lead to serious diseases such as gallbladder cancer or liver cancer. Surgery requires bile duct shaping surgery to relieve obstruction, which increases risks and burdens. The advantages of endoscopic treatment are simplicity, repeatability, and minimally invasiveness. Therapeutic ERCP has been widely used to treat short-term and long-term bile duct stenosis.

[0004] ERCP (endoscopic retrograde cholangiopancreatography) is an imaging technique that uses contrast media to retrogradely display the pancreatic and bile ducts by cannulating the duodenal papilla under endoscopy. It is currently recognized as the gold standard for diagnosing pancreatic and bile duct diseases. On the basis of ERCP, six major techniques can be performed, including sphincterotomy (EST), balloon dilatation of the duodenal papilla, lithotripsy for bile duct stones, common bile duct stent implantation, and nasobiliary duct drainage. Because it does not require surgery, has little trauma, and greatly shortens the hospitalization time, it is very popular among patients.

[0005] EST is a treatment technique developed on the basis of the diagnostic technique of endoscopic retrograde cholangiopancreatography (hereinafter referred to as ERCP). It uses a high-frequency electrosurgical incision knife to cut the duodenal papillary sphincter and the terminal part of the common bile duct under endoscopy. EST is an important treatment technique in the field of endoscopy and is also the prerequisite for other endoscopic treatments of pancreaticobiliary lesions, such as bile duct stone removal, bile duct stricture dilation, biliary stent drainage, bile duct tumor biopsy and radioactive source placement for internal irradiation.

[0006] Balloon dilatation catheters are mainly used for dilation of digestive tract strictures, especially benign strictures. Balloon catheters used in the bile duct are mainly used for dilation of the duodenal papilla, dilation treatment of bile duct strictures, and removal of common bile duct stones. They must be inserted into the bile duct for related dilation treatment after the papilla is incised. Combined use can effectively treat bile duct strictures.

[0007] The current operating technique is to first perform a sphincterotomy with an independent papillotomy knife, insert a guide wire into the bile duct, then retain the guide wire, withdraw the sphincterotomy knife, and then insert a balloon catheter along the guide wire and pass it through the narrow part of the bile duct, inflate it with air or water, and expand it under pressure. After reaching the ideal expanded diameter, withdraw the balloon catheter and retain the guide wire in the bile duct.

[0008] For stubborn strictures, after the above treatments, the stricture is still difficult to expand, and the incision knife is then sent into the bile duct along the guide wire, and then the papilla is cut. In addition, this operation requires multiple instruments and multiple steps, and the operation is cumbersome and time-consuming. When replacing instruments, it is often necessary to reinsert the guide wire due to operational errors. At the same time, the patient's pain and intolerance are increased due to the extended time. It can be seen that the above operation has the following defects: many consumables, high costs, heavy medical burden on patients, etc. At the same time, it requires multiple steps to operate, which is time-consuming, inefficient, and increases the incidence of complications.

[0009] Therefore, the prior art needs to be improved. Summary of the invention

[0010] The purpose of the present application is to provide a balloon dilatation catheter for the liver and gallbladder, aiming to solve the technical problem in the prior art of how to provide a balloon dilatation catheter that can both dilate and cut open bile duct stenosis.

[0011] To achieve the above purpose, the technical solution adopted in this application is:

[0012] The present application provides a hepatobiliary balloon dilatation catheter, which includes:

[0013] outer tube body;

[0014] An inner tube body, the inner tube body is inserted into the outer tube body;

[0015] A foldable balloon, one side of which is fixed to the distal end of the outer tube, and the other side of which is fixed to the distal end of the inner tube;

[0016] A plurality of cutting wires are arranged on the periphery of the folding balloon and extend approximately along the axial direction of the folding balloon. The folding balloon expands or contracts in the short side direction by the pressure of the fluid provided by the outer tube body, so that the cutting wires protrude from the folding balloon or are accommodated in the folding balloon.

[0017] Through the above scheme, the hepatobiliary balloon dilatation catheter in this embodiment can adjust the usage method according to the actual situation of bile duct stenosis, and can independently realize bile duct stenosis dilation and bile duct stenosis cutting operations. It is easy to operate and use, reduces the number of instrument changes during surgery, shortens the operation time, and alleviates the patient's pain.

[0018] In one embodiment, the foldable balloon includes a plurality of continuously connected foldable bodies, and the cutting wire is disposed inside the foldable body.

[0019] Through the above scheme, the folding balloon is expanded or contracted through the folding body. When the folding body is expanded, the cutting wire can be extended outward and protrude from the folding balloon. At this time, the folding balloon can be used to perform bile duct balloon dilatation to expand the diameter of the narrow part; or the cutting wire can be connected to high-frequency electricity to achieve cutting of the narrow part by the cutting wire. When the folding body is contracted, the cutting wire can be wrapped and withdrawn from the catheter. The operation is convenient and easy to use, and the number of instrument changes during surgery can be reduced.

[0020] In one embodiment, the folding body includes a first folding surface, a second folding surface, and a recessed folding axis, the recessed folding axis is connected to the first folding surface and the second folding surface, and the cutting wire is fixed to the recessed folding axis.

[0021] Through the above scheme, when the folding balloon contracts, the first folding surface and the second folding surface can accommodate the cutting wire. When the folding balloon expands, the first folding surface and the second folding surface can drive the cutting wire to move radially outward, so that the cutting wire protrudes from the folding balloon.

[0022] In one embodiment, it further includes:

[0023] A developing ring is arranged on the inner tube body and is located in the folding balloon.

[0024] Through the above scheme, the developing ring can show the position of the folded balloon, making it easier to push the hepatobiliary balloon dilation catheter to the bile duct stenosis.

[0025] In one embodiment, the outer tube body includes a powered wire, and the powered wire is connected to the cutting wire.

[0026] Through the above scheme, the energized wire is connected to the cutting wire. When the cutting wire is needed for cutting, the energized wire can be connected to high-frequency electricity to cut the bile duct stenosis through high-frequency electricity. The cutting speed is fast, and there is no need to replace the instrument. The operation is convenient and can relieve the patient's pain.

[0027] In one embodiment, the energizing wire extends to the inner tube body, and the energizing wire passes through the inner tube body to be connected to the cutting wire.

[0028] Through the above scheme, the cutting wire can be connected to the energized wire on the outer tube body through the energized wire on the inner tube body. When the cutting wire needs to be cut, the energized wire can be connected to high-frequency electricity to cut the bile duct stenosis through high-frequency electricity. The cutting speed is fast, and there is no need to replace the instrument. The operation is convenient and can relieve the patient's pain.

[0029] In one embodiment, the cutting wire comprises one of the following structures:

[0030] Titanium alloy wire or stainless steel wire.

[0031] Through the above scheme, both titanium alloy wire and stainless steel wire can generate high-frequency high-voltage current by passing high-frequency electricity, so as to gasify or coagulate tissue, thereby achieving the purpose of cutting and hemostasis. It has the advantages of simple operation, fast cutting speed and good hemostasis effect.

[0032] In one embodiment, the cutting wire is connected with an insulating coating, and the cutting wire is connected to the folding balloon through the insulating coating.

[0033] Through the above scheme, the side of the cutting wire away from the folding balloon is the effective cutting part, and the side of the cutting wire abutting the folding balloon can be provided with an insulating coating, which effectively isolates the current and plays a role of protection and insulation.

[0034] In one embodiment, the number of the cutting wires is 3-12, and the cutting wires are evenly spaced around the folding balloon.

[0035] Through the above scheme, the folding balloon can use multiple cutting wires to open multiple circumferentially distributed incisions in the bile duct stenosis to expand the bile duct stenosis, and can make tissue tearing more orderly and controllable through less pressure.

[0036] In one embodiment, it further includes:

[0037] A handle comprises a high-frequency electrode, and the high-frequency electrode is used to be connected to the energized wire.

[0038] Through the above scheme, the handle is provided with a high-frequency electrode, which is used to connect with the electrified wire on the outer tube body. By connecting the high-frequency electricity to the high-frequency electrode, the cutting wire can be electrified, and the bile duct stenosis can be cut during the operation.

[0039] The beneficial effects of the hepatobiliary balloon dilatation catheter provided in the present application are at least:

[0040] The present application discloses a hepatobiliary balloon dilatation catheter, which includes: an outer tube body, an inner tube body, a folding balloon, and a plurality of cutting electric wires, wherein the inner tube body is inserted into the outer tube body, one side of the folding balloon is fixed to the distal end of the outer tube body, and the other side of the folding balloon is fixed to the distal end of the inner tube body, the cutting electric wires are arranged on the periphery of the folding balloon and the cutting electric wires extend roughly along the axial direction of the folding balloon, and the folding balloon expands or contracts in the short side direction by providing fluid pressure through the outer tube body, so that the cutting electric wires are protruding from the folding balloon or are accommodated in the folding balloon. The hepatobiliary balloon dilatation catheter in the present application can adjust the use method according to the actual situation of bile duct stenosis, and can realize bile duct stenosis dilatation and bile duct stenosis cutting operations separately, which is convenient to operate and use, reduces the number of instrument changes during surgery, shortens the operation time, and alleviates the patient's pain. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of the structure of a hepatobiliary balloon dilatation catheter provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of the assembly structure of the folding body and the cutting wire provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the assembly structure of a specific embodiment of the folding body and the cutting wire provided in the embodiment of the present application;

[0045] Figure 4 A schematic diagram of a folded state of a foldable balloon provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the connection structure between the cutting wire and the energizing wire provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of the connection structure between the cutting wire and the inner tube body provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of the connection structure between the cutting wire and the folding balloon provided in an embodiment of the present application;

[0049] Figure 8 Schematic diagram of the connection structure between the hepatobiliary balloon dilatation catheter and the handle provided in an embodiment of the present application.

[0050] Among them, the reference numerals in the figure are:

[0051] 100, outer tube body; 200, inner tube body; 300, folding balloon; 400, cutting wire; 500, developing ring; 600, handle; 700, bile duct stenosis; 110, electrified wire; 120, first tube; 210, second tube; 310, folding body; 311, first folding surface; 312, second folding surface; 313, concave folding axis; 410, insulating coating; 610, high-frequency electrode. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] Biliary balloon dilatation is an interventional procedure for the treatment of biliary diseases. The procedure involves pushing a balloon into the area of ​​bile duct stricture or obstruction, and then expanding the stricture or obstruction by inflation to restore the normal flow of bile. For benign strictures, bile duct balloon dilatation can generally dilate the bile duct; however, for stubborn strictures, the bile duct stricture or obstruction must be cut to clear the bile duct stricture, so there are problems such as the need to replace the high-frequency electrosurgical instrument and the long operation time.

[0055] To this end, the present application provides a balloon dilatation catheter for the liver and gallbladder, which can have both dilation and electroresection functions, reduce the number of instrument changes during surgery, shorten the operation time, and is easy to operate, has a fast cutting speed, and a good hemostatic effect, thereby alleviating the patient's pain.

[0056] See also Figure 1The present embodiment provides a balloon dilatation catheter for hepatobiliary use, which includes: an outer tube body 100, an inner tube body 200, a folding balloon 300 and a plurality of cutting wires 400. The inner tube body 200 is inserted into the outer tube body 100, one side of the folding balloon 300 is fixed to the distal end of the outer tube body 100, and the other side of the folding balloon 300 is fixed to the distal end of the inner tube body 200. The cutting wires 400 are arranged on the outer periphery of the folding balloon 300 and the cutting wires 400 extend approximately along the axial direction of the folding balloon 300. The folding balloon 300 expands or contracts in the short side direction by providing fluid pressure through the outer tube body 100, so that the cutting wires 400 are protruded from the folding balloon 300 or are accommodated in the folding balloon 300.

[0057] In this embodiment, the cutting wire 400 is arranged on the periphery of the folding balloon 300, and 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 stored in the folding balloon 300; when the folding balloon 300 is expanded by pressurizing the outer tube body 100, the cutting wire 400 protrudes from the outer surface of the folding balloon 300. At this time, the bile duct stenosis 700 can be expanded by the folding balloon 300 to expand the diameter of the stenotic part, thereby restoring the normal flow of bile. That is, endoscopic bile duct balloon dilatation is achieved, which has the advantages of less trauma, faster recovery, and significant efficacy. When encountering stubborn stenosis, for example, after the above treatment, the stenosis is still difficult to dilate, then the cutting wire 400 can be connected to the high-frequency electrode 610 through the handle 600, so that the cutting wire 400 is charged to cut the bile duct stenosis 700, which has the advantages of simple operation, fast cutting speed, and good hemostasis effect. When the cutting is completed, the folding balloon 300 can be contracted, and the folding balloon 300 can be wrapped around the cutting wire 400 and then withdrawn together, or the function of dilating and cutting can be achieved.

[0058] Therefore, the hepatobiliary balloon dilatation catheter in this embodiment can adjust the usage method according to the actual situation of bile duct stenosis 700, and can independently realize the dilation of bile duct stenosis 700 and the cutting operation of bile duct stenosis 700. It is convenient to operate and use, reduces the number of instrument changes during surgery, shortens the operation time, and alleviates the patient's pain.

[0059] Specifically, see Figure 2 and Figure 3 The folding balloon 300 includes a plurality of continuously connected folding bodies 310 , and a cutting wire 400 is disposed inside the folding body 310 .

[0060] 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 extended outward and protrude from the folding balloon 300. At this time, the folding balloon 300 can be used to perform bile duct balloon dilatation to expand the diameter of the narrow part; or the cutting wire 400 can be connected to high-frequency electricity to achieve cutting of the narrow part 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 and easy to use, and the number of instrument changes during surgery can be reduced.

[0061] Specifically, see Figure 3 and Figure 4 The folding body 310 includes a first folding surface 311 , a second folding surface 312 and a recessed folding axis 313 . The recessed folding axis 313 is connected to the first folding surface 311 and the second folding surface 312 , and the cutting wire 400 is fixed to the recessed folding axis 313 .

[0062] In this embodiment, the folding body 310 is used for the expansion and contraction of the folding balloon 300. The specific structure of the folding body 310 can be in many ways. The folding balloon 300 is expanded by charging, or contracted by releasing pressure. At the same time, the folding body 310 performs corresponding extension or contraction movements. In this embodiment, the cutting wire 400 is cut by high-frequency electricity, so there is no need for the folding balloon 300 to provide cutting pressure. Its operation is extremely simple and the cutting speed is fast. At the same time, the cutting wire 400 occupies a small space, which can facilitate the expansion and contraction of the folding balloon 300 to a certain extent and will not interfere with the folding movement of the folding balloon 300. For example, the folding body 310 includes a first folding surface 311, a second folding surface 312 and a recessed folding axis 313. The first folding surface 311 and the second folding surface 312 are folded through the recessed folding axis 313, which is equivalent to the folding balloon 300 being folded around the recessed folding axis 313 in the long side direction. A plurality of folding lines can be set in the short side direction of the folding balloon 300 to make the folding balloon 300 radially expand or contract, wherein the cutting wire 400 is fixed to the recessed folding axis 313, that is, the cutting wire 400 extends axially along the folding balloon 300, and when the folding balloon 300 contracts, the first folding surface 311 and the second folding surface 312 can accommodate the cutting wire 400, and when the folding balloon 300 expands, the first folding surface 311 and the second folding surface 312 can drive the cutting wire 400 to move radially outward, so that the cutting wire 400 protrudes from the folding balloon 300.

[0063] Specifically, see Figure 5 and Figure 6 The outer tube body 100 includes a power-carrying wire 110 , which is connected to the cutting wire 400 .

[0064] In this embodiment, the power wire 110 is connected to the cutting wire 400. When the cutting wire 400 is required for cutting, the power wire 110 can be connected to high-frequency electricity to cut the bile duct stenosis 700 through high-frequency electricity. The cutting speed is fast, and there is no need to change the instrument. The operation is convenient and can relieve the pain of the patient. For example, the power wire 110 can be embedded in the outer tube body 100, and the power wire 110 is connected to the external power source of the outer tube body 100.

[0065] 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 tube body 100, and the distal end of the folding balloon 300 is connected to the inner tube body 200. The cutting wire 400 can be connected to the energized wire 110 on the outer tube body 100 from the proximal end.

[0066] Alternatively, the cutting wire 400 can be connected to the powered wire 110 on the inner tube body 200 from the distal end, and the powered wire 110 on the inner tube body 200 can be connected to the powered wire 110 of the outer tube body 100 .

[0067] Optionally, the cutting wire 400 includes one of the following structures:

[0068] Titanium alloy wire or stainless steel wire.

[0069] For example, the cutting wire 400 may include a titanium alloy wire, that is, the cutting wire 400 is made of a titanium alloy, and the titanium alloy wire can generate a high-frequency high-voltage current by passing a high-frequency current through the titanium alloy wire, so as to gasify or coagulate the tissue, thereby achieving the purpose of cutting and hemostasis. It has the advantages of simple operation, fast cutting speed, good hemostasis effect, etc.

[0070] For example, the cutting wire 400 may include a stainless steel wire, that is, the cutting wire 400 is made of stainless steel, and the stainless steel wire can generate a high-frequency high-voltage current by passing high-frequency electricity, so as to gasify or coagulate tissue, thereby achieving the purpose of cutting and hemostasis. It has the advantages of simple operation, fast cutting speed, good hemostasis effect, etc.

[0071] Specifically, see Figure 7 The cutting wire 400 is connected with an insulating coating 410 , and the cutting wire 400 is connected to the folding balloon 300 through the insulating coating 410 .

[0072] In this embodiment, the side of the cutting wire 400 facing away from the folding balloon 300 is the effective cutting part, and the side of the cutting wire 400 abutting against the folding balloon 300 can be provided with an insulating coating 410, which effectively isolates the current and plays a role of protection and insulation. For example, the side of the cutting wire 400 close to the folding balloon 300 is provided with a PTFE insulating coating 410, and the cutting wire 400 is connected to the folding balloon 300 through the PTFE insulating coating 410.

[0073] Specifically, see Figure 3 The number of the cutting wires 400 is 3-12, and the cutting wires 400 are evenly spaced around the folding balloon 300.

[0074] In this embodiment, the number of cutting wires 400 is 3-12, and the cutting wires 400 are evenly spaced around the folding balloon 300. For example, when the number of cutting wires 400 is 3, it is equivalent to distributing 3 cutting wires 400 around the folding balloon 300, and the angles between two adjacent cutting wires 400 are both 120°. When the folding balloon 300 is unfolded and high-frequency electricity is applied to the cutting wires 400, the folding balloon 300 can use the cutting wires 400 to open 3 circumferentially distributed incisions in the bile duct stenosis 700 to expand the bile duct stenosis 700, and can make tissue tearing more orderly and controllable with less pressure. For example, when the number of cutting wires 400 is 12, the bile duct stenosis 700 can be cut at multiple positions on the periphery of the folding balloon 300 to expand and clear the bile duct stenosis 700.

[0075] Optionally, the height of the cutting wire 400 is 0.05-1 mm, and the width of the cutting wire 400 is 0.1-1 mm.

[0076] In this embodiment, the cutting wire occupies a small space and will not affect the folding and contraction movement of the folding airbag. At the same time, the cutting wire has a fast cutting speed, high efficiency, and convenient operation, which can reduce the operation time.

[0077] Specifically, see Figure 8 The hepatobiliary balloon dilatation catheter also includes: a developing ring 500, which is arranged on the inner tube body 200 and located in the folding balloon 300.

[0078] In this embodiment, the developing ring 500 can display the position of the folded balloon 300, so as to facilitate pushing the hepatobiliary balloon dilation catheter to the bile duct stenosis 700. The developing ring 500 can be understood as the prior art, and the structure of the developing ring 500 will not be described in detail.

[0079] Specifically, see Figure 8 The hepatobiliary balloon dilatation catheter further includes a handle 600 , the handle 600 includes a high-frequency electrode 610 , and the high-frequency electrode 610 is used to be connected to the electrified wire 110 .

[0080] In this embodiment, the handle 600 is provided with a high-frequency electrode 610, which is used to connect to the energized wire 110 on the outer tube body 100. By connecting high-frequency electricity to the high-frequency electrode 610, the cutting wire 400 can be charged, and the bile duct stenosis 700 can be cut during surgery.

[0081] When faced with bile duct stenosis 700, existing technology cannot directly detect and distinguish whether it is benign stenosis or stubborn stenosis (benign stenosis means that the diameter of the stenosis can be expanded through bile duct balloon dilatation; stubborn stenosis means that the diameter of the stenosis is difficult to expand through bile duct balloon dilatation). Therefore, bile duct balloon dilatation is required before a judgment is made. If it is stubborn stenosis, a high-frequency electric knife needs to be replaced for cutting and dilation. The operation takes a long time, which increases the workload of the doctor and the pain of the patient.

[0082] In this embodiment, the hepatobiliary balloon dilatation catheter is in a contracted state in the catheter during the pushing process. The second conduit 210 of the inner tube body 200, under the guidance of the guide wire, pushes the hepatobiliary balloon dilatation catheter to the position of the bile duct stenosis 700, and pushes the hepatobiliary balloon dilatation catheter out of the catheter, so that the folded balloon 300 is located in the bile duct stenosis 700, and then the first conduit 120 of the outer tube body 100 is pressurized to expand the folded balloon 300 and dilate the bile duct stenosis 700. After the bile duct stenosis 700 reaches the ideal expansion diameter, the first conduit 120 of the outer tube body 100 is pushed into the catheter. The folding balloon 300 is decompressed to shrink the folding balloon 300; if the stenosis is stubborn, that is, the bile duct balloon dilatation has not achieved actual results, the bile duct stenosis 700 is still difficult to expand after the folding balloon 300 shrinks. At this time, the folding balloon 300 needs to be pushed again to the position of the bile duct stenosis 700, and then the first pipe 120 of the outer tube body 100 is pressurized again to expand the folding balloon 300 and pass high-frequency electricity to the cutting wire 400, so that the cutting wire 400 is charged to cut the bile duct stenosis 700, so that the bile duct stenosis 700 expands to expand the diameter of the stenosis, thereby restoring the normal flow of bile. After the bile duct stenosis 700 is expanded, the first pipe 120 of the outer tube body 100 can be decompressed to shrink the folding balloon 300 and withdraw it into the catheter, and then withdraw it from the second pipe 210 under the guidance of the guide wire.

[0083] In summary, the present application discloses a hepatobiliary balloon dilatation catheter, which includes: an outer tube body, an inner tube body, a folding balloon, and a plurality of cutting wires, the inner tube body is inserted into the outer tube body, one side of the folding balloon is fixed to the distal end of the outer tube body, and the other side of the folding balloon is fixed to the distal end of the inner tube body, the cutting wires are arranged on the periphery of the folding balloon and the cutting wires extend roughly along the axial direction of the folding balloon, and the folding balloon expands or contracts in the short side direction by providing fluid pressure through the outer tube body, so that the cutting wires are protruding from the folding balloon or are accommodated in the folding balloon. The hepatobiliary balloon dilatation catheter in the present application can adjust the method of use according to the actual situation of bile duct stenosis, and can independently realize the dilation and cutting operations of bile duct stenosis, which is convenient to operate and use, reduces the number of instrument changes during surgery, shortens the operation time, and alleviates the patient's pain.

[0084] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A hepatobiliary balloon dilatation catheter, characterized in that: include: outer tube body; An inner tube body, the inner tube body is inserted into the outer tube body; A foldable balloon, one side of which is fixed to the distal end of the outer tube, and the other side of which is fixed to the distal end of the inner tube; A plurality of cutting wires are arranged on the periphery of the folding balloon and extend approximately along the axial direction of the folding balloon. The folding balloon expands or contracts in the short side direction by the pressure of the fluid provided by the outer tube body, so that the cutting wires protrude from the folding balloon or are accommodated in the folding balloon.

2. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: The folding balloon comprises a plurality of continuously connected folding bodies, wherein the cutting wire is arranged in the folding body.

3. The hepatobiliary balloon dilatation catheter according to claim 2, characterized in that: The folding body comprises a first folding surface, a second folding surface and a concave folding axis, the concave folding axis is connected to the first folding surface and the second folding surface, and the cutting wire is fixed to the concave folding axis.

4. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: Also includes: A developing ring is arranged on the inner tube body and is located in the folding balloon.

5. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: The outer tube body comprises a powered wire, and the powered wire is connected to the cutting wire.

6. The hepatobiliary balloon dilatation catheter according to claim 5, characterized in that: The energizing wire extends to the inner tube body, and the energizing wire passes through the inner tube body and is connected with the cutting wire.

7. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: The cutting wire comprises one of the following structures: Titanium alloy wire or stainless steel wire.

8. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: The cutting wire is connected with an insulating coating, and the cutting wire is connected to the folding balloon through the insulating coating.

9. The hepatobiliary balloon dilatation catheter according to claim 1, characterized in that: The number of the cutting wires is 3-12, and the cutting wires are evenly spaced around the folding balloon.

10. The hepatobiliary balloon dilatation catheter according to claim 5, characterized in that: Also includes: A handle comprises a high-frequency electrode, and the high-frequency electrode is used to be connected to the energized wire.

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