Sleeve type balloon dilatation catheter

Abstract

The utility model relates to a snare type balloon dilatation catheter. The snare type balloon dilatation catheter comprises a balloon catheter and a snare. The balloon catheter comprises a core tube, a handle assembly and a balloon. The snare comprises a snare, an inhaul cable, an outer tube, a handle rod piece and a handle sliding ring. The front end of the snare sequentially penetrates through the liquid injection channel of the handle assembly in the balloon catheter and the liquid injection cavity of the core tube and then extends into the balloon, the snare of the snare is suitable for being expanded in the balloon, and the snare takes the balloon as a sleeve body to take foreign matters. The hemostat can be used for expanding, blocking, stopping bleeding and extracting foreign matters, and is simple and convenient to operate. The balloon can be used as a net for foreign matter extraction during foreign matter extraction, existing net bag type foreign matter forceps are replaced, the net bag does not need to be sewed, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, and particularly relates to a snare-type balloon dilatation catheter. Background Technique

[0002] With the development of society and the increasing improvement of people's living standards, the phenomena of natural lumen stenosis, bleeding and foreign bodies in the natural lumen caused by various reasons are relatively common. With the development of endoscopic instruments and diagnostic techniques and the improvement of the operation level of endoscopic doctors, balloon dilatation surgery has become the mainstream method for treating stenosis and blocking bleeding due to its small trauma, low risk, little pain and quick recovery. And the endoscopic foreign body removal has gradually become the preferred treatment method for removing foreign bodies in the natural lumen due to its simple operation, small trauma and low cost.

[0003] At present, stenosis and bleeding are mainly treated by balloon dilatation catheter instruments, and foreign bodies are mainly grasped by a net-type foreign body forceps. When a patient needs to be dilated and the foreign body is removed, two instruments need to be used for the operation respectively, and the operation is complex. Moreover, the manufacturing process of the net of the net-type foreign body forceps is also relatively complex, and the production efficiency is low. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a snare-type balloon dilatation catheter to solve the technical problems that when dilation and foreign body removal need to be carried out simultaneously at present, two instruments need to be used for the operation respectively, the operation is complex, and the production efficiency is low.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Provide a snare-type balloon dilatation catheter, including

[0007] a balloon catheter and a snare;

[0008] The balloon catheter includes a core tube, a handle assembly and a balloon. The core tube is a double-lumen tube. The balloon is arranged at the front end of the core tube. The balloon is communicated with the liquid injection cavity of the core tube. The handle assembly is arranged at the rear end of the core tube. A liquid injection channel and a guide wire channel are opened in the handle assembly. The liquid injection channel is communicated with the liquid injection cavity. The guide wire channel is communicated with the guide wire cavity;

[0009] The snare includes a snare, a cable, an outer tube, a handle rod and a handle slip ring. The handle slip ring is slidably arranged on the handle rod. The front end of the handle rod is connected with the outer tube. The cable is arranged in the outer tube. The rear end of the cable is connected with the handle slip ring. The front end of the cable is connected with the snare;

[0010] The front end of the snare passes through the liquid injection channel of the handle assembly in the balloon catheter and the liquid injection cavity of the core tube in sequence and extends into the balloon. The snare of the snare is suitable for expanding in the balloon, and the snare uses the balloon as a sleeve to retrieve foreign bodies.

[0011] Further, the front end of the core tube is connected to a guide wire tube, and the rear end of the guide wire tube is connected to the guide wire cavity at the front end of the core tube;

[0012] The rear end of the balloon is hermetically connected to the outer wall of the core tube, and the front end of the balloon is hermetically connected to the outer wall of the guide wire tube.

[0013] Further, the structure of the snare is hexagonal or hemispherical.

[0014] The beneficial effects of the present utility model are:

[0015] The present utility model provides a snare-type balloon dilation catheter, which can dilate, block bleeding and retrieve foreign bodies, and is simple and convenient to operate.

[0016] When retrieving foreign bodies, the balloon can be used as a net to retrieve foreign bodies, replacing the existing net pocket-type foreign body forceps. There is no need to sew the net pocket, which improves production efficiency.

[0017] Through the combination of the balloon dilation catheter and the snare-type foreign body forceps, the bleeding and perforation complications caused by the insertion of the foreign body forceps during the operation can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a schematic diagram of a traditional balloon catheter;

[0020] Figure 2 is a schematic diagram of a traditional snare;

[0021] Figure 3 is a schematic diagram of the snare in the snare-type balloon dilation catheter of the present utility model;

[0022] Figure 4 is a schematic diagram of a hexagonal snare;

[0023] Figure 5 is a schematic diagram of a hemispherical snare;

[0024] Figure 6 is a schematic diagram of the snare-type balloon dilation catheter of the present utility model;

[0025] 2. Balloon catheter, 21. Core tube, 22. Balloon, 23. Handle assembly, 24. Guide wire tube;

[0026] 3. Snare, 31. Snare loop, 32. Cable, 33. Outer tube, 34. Handle rod, 35. Handle slip ring, 36. Retaining net. Detailed implementation mode

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0028] This application provides a snare type balloon dilation catheter, which will be described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of this application. And in the following embodiments, each embodiment is described with emphasis. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0029] To solve the technical problem in the prior art that when dilation and foreign body removal need to be carried out simultaneously, two instruments are required for the operation respectively, which is complicated in operation and low in production efficiency, an embodiment of this application provides a snare type balloon dilation catheter. It will be elaborated in detail below.

[0030] As Figure 6 shown, a snare type balloon dilation catheter includes

[0031] a balloon catheter 2 and a snare 3;

[0032] As Figure 1 shown, the balloon catheter 2 includes a core tube 21, a handle assembly 23 and a balloon 22. The core tube 21 is a double lumen tube. The balloon 22 is arranged at the front end of the core tube 21. The balloon 22 is communicated with the liquid injection cavity of the core tube 21. The handle assembly 23 is arranged at the rear end of the core tube 21. A liquid injection channel and a guide wire channel are opened in the handle assembly 23. The liquid injection channel is communicated with the liquid injection cavity, and the guide wire channel is communicated with the guide wire cavity;

[0033] As Figure 1 shown, the front end of the core tube 21 is connected to a guide wire tube 24, and the rear end of the guide wire tube 24 is connected to the guide wire cavity at the front end of the core tube 21; The rear end of the balloon 22 is hermetically connected to the outer wall of the core tube 21, and the front end of the balloon 22 is hermetically connected to the outer wall of the guide wire tube 24.

[0034] As Figures 3 to 5As shown in the figure, the snare 3 includes a snare 31, a cable 32, an outer tube 33, a handle rod 34, and a handle slip ring 35. The handle slip ring 35 is slidably arranged on the handle rod 34. The front end of the handle rod 34 is connected to the outer tube 33. The cable 32 is threaded through the outer tube 33. The rear end of the cable 32 is connected to the handle slip ring 35, and the front end of the cable 32 is connected to the snare 31.

[0035] The front end of the snare 3 sequentially passes through the liquid injection channel of the handle assembly 23 in the balloon catheter 2 and the liquid injection cavity of the core tube 21 and then extends into the balloon 22. The snare 31 of the snare 3 is adapted to expand within the balloon 22, and the snare 31 uses the balloon 22 as a sleeve to extract foreign objects.

[0036] In this embodiment, the structure of the snare is hexagonal or hemispherical.

[0037] As a preference of this embodiment, the structure of the snare 31 is hexagonal.

[0038] Working principle of the snare 3: The handle slip ring 35 can drive the snare 31 to move back and forth through the cable 32. When the snare 31 moves backward, it can be locked inside the outer tube 33. At this time, the snare 3 can be inserted through the liquid injection channel of the balloon catheter 2. When the handle slip ring 35 drives the snare 31 to move forward, the snare 31 can extend out of the outer tube 33. At this time, the snare 31 can cooperate with the balloon 22 to extract foreign objects.

[0039] The traditional snare 3 is as Figure 2 As shown in the figure, the difference between the structure of the snare 3 used in this embodiment and the traditional snare 3 is that: a net pocket 36 is installed in the snare 31 of the traditional snare 3. The traditional snare 3 is an independent instrument and operates independently. After entering the human body, it can extract foreign objects alone. The structure of the snare 3 adopted by the present utility model is as Figure 3 As shown in the figure, the net pocket 36 is no longer installed in the snare 31, and the rest of the structure is the same as that of the traditional snare 3. For the snare 3 in this embodiment, since it is inserted into the balloon catheter 2, the balloon 22 is used as the net pocket 36 to extract foreign objects. When the balloon 22 is inflated by injecting liquid, it can play a blocking role, and when the balloon 22 contracts, it serves as the net pocket 36 of the snare 31 to extract foreign objects.

[0040] The working process of the snare-type balloon dilatation catheter adopting the present utility model is as follows:

[0041] When the lesion site is bleeding, a balloon dilatation catheter needs to be used for temporary blocking or occlusion to prevent blood from flowing into other places. First, select a suitable guide wire, and send the guide wire across the bleeding site under the monitoring of an endoscope or other equipment. Slowly insert the balloon dilatation catheter along the end of the guide wire, confirm that the two developing marks are across the bleeding site, use a pressure pump with a gauge to connect it to the injection cavity of the handle side branch, and slowly inject liquid into the balloon 22. When the working pressure is reached, stop pressurizing and maintain for 1 to 3 minutes to observe the blocking effect. After the expansion is completed, drain the liquid in the balloon 22, shrink the balloon 22, and withdraw the balloon 22.

[0042] When stenosis occurs at the lesion site, a balloon dilatation catheter is required for dilation. First, select a suitable guide wire, send the guide wire to the stenotic site and leave it in place under the monitoring of an endoscope or other equipment, slowly insert the balloon dilatation catheter along the end of the guide wire, confirm that the two developing marks are located at both ends of the stenotic site, use a pressure pump with a gauge to connect it to the injection cavity of the handle side branch, slowly inject liquid into the balloon 22, stop pressurizing when the working pressure is reached, maintain for 1 to 3 minutes, observe the dilation effect or the blocking effect, and after the dilation is completed, drain the liquid in the balloon 22, shrink the balloon 22, and withdraw the balloon 22.

[0043] When the patient needs to remove the foreign body, the guide wire is sent to the distal end of the foreign body and left there under the monitoring of the endoscope or other equipment, the balloon dilatation catheter is slowly inserted along the guide wire and close to the foreign body, and then the unopened snare 3 is inserted along the injection channel of the balloon catheter 2. When the head end of the snare 3 is close to the foreign body, the handle slip ring 35 is pushed forward to open the snare 31. The snare 31 is located inside the balloon 22. When the snare 31 is opened, the balloon 22 can be expanded. The balloon 22 is equivalent to a net bag 36, which can grab the foreign body. After grabbing the foreign body, the balloon dilatation catheter and the foreign body forceps are slowly withdrawn together.

[0044] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0045] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0047] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical, or other forms.

[0048] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0049] In addition, in each embodiment of the present utility model, the functional units can be integrated in one processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0050] Taking the above ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A snare-type balloon dilatation catheter, characterized in that: include A balloon catheter (1) and a snare (3); The balloon catheter (1) comprises a core tube (21), a handle assembly (23) and a balloon (22); the core tube (21) is a double-lumen tube; the balloon (22) is arranged at the front end of the core tube (21); the balloon (22) is communicated with the injection cavity of the core tube (21); the handle assembly (23) is arranged at the rear end of the core tube (21); an injection channel and a guide wire channel are provided in the handle assembly (23); the injection channel is communicated with the injection cavity; and the guide wire channel is communicated with the guide wire cavity; The snare (3) comprises a snare (31), a cable (32), an outer tube (33), a handle rod (34) and a handle slip ring (35); the handle slip ring (35) is slidably arranged on the handle rod (34); the front end of the handle rod (34) is connected to the outer tube (33); the cable (32) is inserted into the outer tube (33); the rear end of the cable (32) is connected to the handle slip ring (35); and the front end of the cable (32) is connected to the snare (31); The front end of the snare (3) passes through the injection channel of the handle assembly (23) and the injection cavity of the core tube (21) in the balloon catheter (1) in sequence and then extends into the balloon (22). The snare (31) of the snare (3) is suitable for being expanded in the balloon (22). The snare (31) uses the balloon (22) as a sheath to remove foreign bodies.

2. The snare-type balloon dilatation catheter according to claim 1, characterized in that: The front end of the core tube (21) is connected to the wire guide tube (24), and the rear end of the wire guide tube (24) is connected to the wire guide cavity at the front end of the core tube (21); The rear end of the balloon (22) is sealed to the outer wall of the core tube (21), and the front end of the balloon (22) is sealed to the outer wall of the guide wire tube (24).

3. The snare-type balloon dilatation catheter according to claim 1, characterized in that: The structure of the trap (31) is hexagonal or hemispherical.

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