Balloon dilatation catheter capable of automatically adjusting internal stress

Abstract

The utility model relates to a balloon dilatation catheter capable of automatically adjusting internal stress, which comprises a catheter, a balloon, a guide wire and a catheter seat, the balloon is arranged on the catheter, the rear end of the catheter is connected with the catheter seat, the guide wire is arranged in the catheter in a penetrating manner, the front end of the guide wire is connected to a guide head, and the rear end of the guide wire is connected with the catheter seat; a pipe hole is formed in the catheter seat, the rear end of the catheter is inserted from the front end of the pipe hole and is fixedly connected with the pipe hole in a sealed mode, and the rear end of the pipe hole serves as a liquid inlet; an elastic piece is arranged in the catheter hole, the rear end of the elastic piece abuts against the catheter base, the front end of the elastic piece is connected with a guide wire, and the elastic piece is suitable for applying axial forward thrust to the guide wire. The operation flexibility of the balloon catheter is improved, so that the balloon catheter can be smoothly inserted into and withdrawn from the forceps channel hole of the endoscope, the endoscope insertion frequency is reduced, the operation time is shortened, and the operation success rate is improved.

Description

Technical Field

[0001] The utility model relates to medical equipment, in particular to a balloon dilatation catheter capable of self-adjusting internal stress. Background Art

[0002] At present, the symptoms of ureteral stenosis caused by various reasons are relatively common. There are two main causes of ureteral stenosis, one is congenital and the other is secondary. This disease is a more difficult urological disease because the operation itself is also a kind of trauma. While treating the ureteral stenosis, it is possible to form a new stenosis area on the basis of the original ureteral stenosis or other non-stenotic areas. Ureteral stenosis may cause incomplete or complete urinary tract obstruction, and the drainage of urine is not smooth. The patient may have a distending pain in the waist. In severe cases, repeated urinary tract infections may occur, and the renal pelvis and calyces may be dilated, which eventually leads to renal damage and renal dysfunction. In severe cases, there is a possibility of renal failure, which is a huge loss for patients. Therefore, it is very important to reduce or even relieve ureteral obstruction and prevent further damage to renal function.

[0003] Ureteral stenosis is mostly caused by stone obstruction, inflammation, trauma, tumor or retroperitoneal fibrosis. The common treatment methods for ureteral stenosis are mainly open surgery, but since the 20th century, endoscopic minimally invasive surgery has been widely used. Common ones are ureteroscopic rigid dilation, ureteral stent placement and dilation, ureteroscopic stricture segment incision and ureteral balloon dilation. Among them, ureteral balloon dilation is mainly compared with other surgeries because of less trauma, fewer complications and faster recovery. Balloon dilation surgery has become a recognized safe, reliable and minimally invasive treatment method.

[0004] Conventional ureteral balloon dilatation catheters, such as Figure 1 Figure 2 As shown, it includes a balloon 1, a catheter 2, a three-way handle 4 and a guide wire 3. The balloon 1 is fixed to the front of the catheter 2. The rear end of the catheter 2 is inserted into the three-way handle 4 and fixedly connected to the three-way handle 4. The guide wire 3 is inserted into the catheter 2. The front end of the guide wire 3 is fixedly connected to the guide head. The rear end of the guide wire 3 is fixed to the inner cavity of the three-way handle 4 by glue 8. Figure 2 As shown, after the front and rear ends of the guide wire 3 are fixedly connected, the ureteral balloon dilatation catheter faces the following challenges.

[0005] 1. Technical limitations: During use, liquid needs to be injected into the injection cavity to fill the balloon, and the guidewire channel is sealed with glue, and the guidewire cannot be withdrawn. Specifically, the balloon and catheter will cause elastic deformation after filling, and the radial and axial dimensions will increase. At this time, the catheter and balloon are in a slightly bent state. When withdrawing the balloon from the clamp channel hole of the endoscope, the rear end face of the balloon will be stuck with the clamp channel hole. The reason is: the catheter and balloon are stretched due to filling. Since the end of the guidewire is fixed with glue and the guidewire is a metal wire, its elastic deformation is weaker than that of the catheter and balloon, the matching gap between the product head end and the guidewire head end becomes larger, and the support becomes weaker, affecting the overall withdrawal performance of the product.

[0006] 2. Time pressure: In a tense surgical environment, operating the three-way handle may require quick decisions within a limited time, which may increase the risk of human error.

[0007] 3. Increased complexity of the device: Devices with separate guidewire lumens and injection lumens may be more complex to manufacture, increasing manufacturing costs. Utility Model Content

[0008] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a balloon dilatation catheter that can self-adjust internal stress, so as to solve the problem that the guide wire in the previous balloon dilatation catheter is fixed at both ends, resulting in the inability to adapt to the elastic deformation caused by the balloon and the catheter after filling, and the catheter and the balloon are piled up, thereby making it difficult to insert and withdraw the balloon catheter from the clamp channel hole of the endoscope.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] Provided is a balloon dilatation catheter capable of self-adjusting internal stress, comprising a catheter, a balloon, a guide wire and a catheter seat, wherein the balloon is arranged on the catheter, the rear end of the catheter is connected to the catheter seat, the guide wire is inserted into the catheter, the front end of the guide wire is connected to the guide head, and the rear end of the guide wire is connected to the catheter seat; a tube hole is provided in the catheter seat, the rear end of the catheter is inserted from the front end of the tube hole and forms a sealed fixed connection with the tube hole, and the rear end of the tube hole serves as a liquid inlet;

[0011] An elastic member is arranged in the tube hole, a rear end of the elastic member abuts against the catheter seat, a front end of the elastic member is connected to the guide wire, and the elastic member is suitable for applying an axial forward thrust to the guide wire.

[0012] Furthermore, the elastic member is a spring, the tube hole is a stepped hole that is larger at the front and smaller at the back, the spring is arranged in the large hole, and the rear end of the conduit is sealed and fixedly connected to the large hole.

[0013] Furthermore, the spring and the guide wire are fixed by welding.

[0014] Furthermore, the rear end of the guide wire extends out from the lower hole and forms a bent portion.

[0015] Furthermore, the spring is arranged in the inner cavity of the catheter seat, the rear end of the spring abuts against the catheter seat, and the front end of the spring is fixed to the guide wire by welding.

[0016] Furthermore, the rear end of the catheter seat is connected to a Luer connector.

[0017] Furthermore, the rear end of the conduit is inserted into the large hole and fixedly connected to the inner wall of the large hole by glue spotting.

[0018] The beneficial effects of the utility model are:

[0019] The balloon dilatation catheter of the utility model which can self-adjust internal stress can provide axial thrust for the guide wire through the spring structure in the catheter seat. This design allows the catheter and the balloon to remain in a straight line after pressure relief, reducing deformation and accumulation caused by pushing, dilating, and withdrawing. Especially when the withdrawal force is large, the spring structure not only compensates for the deformation of the balloon and the catheter, but the setting of the hook also serves as a second insurance, enhancing safety during the operation. This design allows the balloon catheter to be smoothly inserted and withdrawn from the clamp channel hole of the endoscope, reducing the number of insertions, shortening the operation time, and thus improving the success rate of the operation.

[0020] The handle consisting of the catheter hub and Luer connector has been changed from a multi-lumen to a single-lumen one, with only one interface, making the operation intuitive, easy to understand and execute, reducing the possibility of operating errors and improving surgical safety.

[0021] Due to its simple structure, the single-pass handle is easier to clean and disinfect, thereby reducing the risk of infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of a traditional ureteral balloon dilatation catheter;

[0024] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 It is a schematic diagram of the balloon dilatation catheter capable of self-adjusting internal stress of the utility model;

[0026] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0027] Among them, 1. balloon, 2. catheter, 3. guide wire, 31. bending part, 4. three-way handle, 5. catheter seat, 6. spring, 7. Luer connector, 8. dispensing. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The present application provides a balloon dilatation catheter that can self-adjust internal stress, which is 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 the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0030] In order to solve the technical problem that the guide wire in the balloon dilatation catheter in the prior art is fixed at both ends, which makes it unable to adapt to the elastic deformation caused by the balloon and the catheter after filling, and the catheter and the balloon are piled up, which makes it difficult to insert and withdraw the balloon catheter from the clamp channel hole of the endoscope. One embodiment of the present application provides a balloon dilatation catheter that can self-adjust internal stress. It is described in detail below.

[0031] like Figure 3 Figure 4 As shown, a balloon dilatation catheter capable of self-adjusting internal stress comprises a catheter 2, a balloon 1, a guide wire 3 and a catheter seat 5, wherein the balloon 1 is arranged on the catheter 2, the rear end of the catheter 2 is connected to the catheter seat 5, the guide wire 3 is passed through the catheter 2, the front end of the guide wire 3 is connected to the guide head, and the rear end of the guide wire 3 is connected to the catheter seat 5; a tube hole is provided in the catheter seat 5, the rear end of the catheter 2 is inserted from the front end of the tube hole and forms a sealed fixed connection with the tube hole, and the rear end of the tube hole serves as a liquid inlet;

[0032] An elastic member is arranged in the tube hole, the rear end of the elastic member abuts against the catheter seat 5 , the front end of the elastic member is connected to the guide wire 3 , and the elastic member is suitable for applying an axial forward thrust to the guide wire 3 .

[0033] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the elastic member is a spring 6, the tube hole is a stepped hole with a larger front and a smaller rear, the spring 6 is arranged in the large hole, and the rear end of the conduit 2 is sealed and fixedly connected to the large hole.

[0034] As a preference of this embodiment, the rear end of the conduit 2 is inserted into the large hole and fixedly connected to the inner wall of the large hole by using glue 8.

[0035] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the spring 6 and the guide wire 3 are fixed by welding.

[0036] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the rear end of the guide wire 3 extends out from the lower hole and forms a bent portion.

[0037] The bending portion is an “O”-shaped structure, formed by bending the guide wire 3 .

[0038] A certain amount of gap needs to be reserved between the bent portion and the rear end surface of the catheter seat 5 , and the gap is used for the guide wire to compensate for the deformation of the balloon 1 and the catheter 2 axially forward.

[0039] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the spring 6 is disposed in the inner cavity of the catheter seat 5 , the rear end of the spring 6 abuts against the catheter seat 5 , and the front end of the spring 6 is welded and fixed to the guide wire 3 .

[0040] Specifically, as an optional implementation in this embodiment, Figure 4 As shown, the rear end of the catheter seat 5 is connected to the Luer connector 7.

[0041] During operation, liquid is injected into the catheter seat 5 through the Luer connector 7. The liquid enters from the rear end of the tube hole and enters the balloon 1 along the catheter 2. The balloon 1 is filled and bulged. After the operation is completed, the liquid in the balloon 1 and the catheter 2 flows out from the Luer connector 7. The balloon 1 and the catheter 2 will undergo elastic deformation during the filling process and their sizes will increase. Since the spring 6 always provides an axial forward thrust to the guide wire 3, the guide wire 3 can move forward relative to the catheter 2, thereby continuing to straighten the catheter 2 and the balloon 1. After being straightened, the balloon catheter can be smoothly withdrawn from the clamp channel hole.

[0042] The balloon catheter of the utility model has better operability, and the physical restriction elastic component applies a predetermined tension or compression force, so that the guide wire 3 obtains better pushing performance, thereby enhancing the overall guiding performance of the product.

[0043] The balloon catheter of the utility model has higher stability, and the increased axial thrust makes the product more stable in the cavity and less likely to bend or shift, thereby improving the accuracy of the operation.

[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 invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the several embodiments provided in 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 schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For 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 mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

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

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

[0050] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A balloon dilatation catheter capable of self-adjusting internal stress, comprising a catheter (2), a balloon (1), a guide wire (3) and a catheter seat, wherein the balloon (1) is arranged on the catheter (2), the rear end of the catheter (2) is connected to the catheter seat, the guide wire (3) is inserted into the catheter (2), the front end of the guide wire (3) is connected to a guide head, and the rear end of the guide wire (3) is connected to the catheter seat; wherein the balloon (1) is arranged on the catheter (2), the rear end of the guide wire (3) is connected to the catheter seat; wherein the balloon (1) is arranged on the catheter (2), the front end of the guide wire (3) is connected to a guide head, and the rear end of the guide wire (3) is connected to the catheter seat; wherein the balloon (1) is arranged on the catheter (2), the front end of the guide wire (3) is connected to a guide head, and the rear end of the guide wire (3) is connected to the catheter seat; wherein the balloon (1) is arranged on the catheter (2), the front end of the guide wire (3) is connected to a guide head, and the rear end of the guide wire (3) is connected to the catheter seat; wherein the balloon (1) is arranged on the catheter (2), the front end of the guide wire (3) is connected to the ... A tube hole is provided in the catheter seat, and the rear end of the catheter (2) is inserted from the front end of the tube hole and forms a sealed fixed connection with the tube hole, and the rear end of the tube hole serves as a liquid inlet; An elastic member is arranged in the tube hole, the rear end of the elastic member abuts against the catheter seat, the front end of the elastic member is connected to the guide wire (3), and the elastic member is suitable for applying an axial forward thrust to the guide wire (3).

2. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 1, characterized in that: The elastic member is a spring (6), the tube hole is a stepped hole that is larger at the front and smaller at the rear, the spring (6) is arranged in the large hole, and the rear end of the conduit (2) is sealed and fixedly connected to the large hole.

3. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 2, characterized in that: The spring (6) and the guide wire (3) are connected and fixed by welding.

4. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 2, characterized in that: The rear end of the guide wire (3) extends out from the lower hole and forms a bent portion (31).

5. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 2, characterized in that: The spring (6) is arranged in the inner cavity of the catheter seat (5), the rear end of the spring (6) is in contact with the catheter seat (5), and the front end of the spring (6) is welded and fixed to the guide wire (3).

6. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 1, characterized in that: The rear end of the catheter seat is connected to a Luer connector (7).

7. The balloon dilatation catheter capable of self-adjusting internal stress according to claim 2, characterized in that: The rear end of the conduit (2) is inserted into the large hole and is fixedly connected to the inner wall of the large hole by glue dispensing.

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