Ureteral catheter fishing-out device

Abstract

The utility model discloses a ureteral catheter fishing device which is characterized in that an outer tube is sleeved on an inner tube, and the inner tube reciprocates between a first position and a second position; one end of the connecting piece is connected with the fixing part, and the other end is connected with the outer pipe; the connecting pieces are arranged around the center of the inner pipe in an annular array mode, and an expansion channel is formed between every two adjacent connecting pieces. One end of the expansion piece is connected with the fixing part, and the other end is connected with the inner pipe; the expansion pieces are annularly arrayed around the center of the inner pipe; when the inner pipe is arranged at the second position, the expansion piece extends out of the expansion channel; when the inner pipe is arranged at the first position, the expansion piece is arranged in the containing cavity. Through the arrangement that the inner pipe and the outer pipe are connected in a sliding and sleeving mode, the inner pipe can do reciprocating motion between the first position and the second position, and the expansion piece expands, shrinks or rotates; the expansion piece is switched according to the positions of the inner tubes, and the ureteral catheter is hooked and fixed. The operation steps are simplified, and the efficiency and the success rate of pulling out the ureteral catheter are improved.

Description

Technical Field

[0001] This invention relates to the field of ureteral technology, and more particularly to a device for retrieving a ureteral catheter. Background Technology

[0002] In medical practice, patients often experience ureteral dilatation or stenosis. Whether it is pyelonephrology or vesicoureteral surgery, a ureteral catheter is routinely placed after the operation to ensure the patency of the urinary tract. The ureteral catheter needs to be removed after a period of time after the operation.

[0003] Currently, there is a three-jaw forceps on the market, mainly used to remove ureteral catheters, but it is very expensive, which undoubtedly increases the burden on patients and hospitals. There is also a biopsy forceps, but it is an instrument used to take tissue from the bladder for biopsy. Using it to remove ureteral catheters is difficult and often slips out.

[0004] For the reasons mentioned above, this utility model patent is hereby applied for. Summary of the Invention

[0005] In view of the above problems, this application provides a device for retrieving a ureteral catheter, comprising:

[0006] Inner tube;

[0007] An outer tube is slidably sleeved on an inner tube, and the inner tube reciprocates between a first position and a second position.

[0008] Fixing part;

[0009] A connector, one end of which is connected to the fixing part and the other end of which is connected to the outer tube; there are multiple connectors arranged in a ring array around the center of the inner tube to form a receiving cavity, and there is an expansion channel between two adjacent connectors, and the expansion channel is connected to the receiving cavity;

[0010] An expansion member, one end of which is connected to the fixing part and the other end of which is connected to the inner tube, is a flexible expansion member; there are multiple expansion members arranged in a ring array around the center of the inner tube, and the multiple expansion members are staggered with the connecting member;

[0011] When the inner tube is in the second position, the expansion member extends out from the expansion channel; when the inner tube is in the first position, the expansion member is placed in the accommodating cavity.

[0012] In the technical solution of this application embodiment, there are 3 expansion members and 3 connecting members.

[0013] In the technical solution of this application embodiment, the inner tube is a solid inner tube.

[0014] In the technical solution of this application embodiment, the end of the fixing part away from the inner tube is arc-shaped.

[0015] In the technical solution of this application embodiment, the outer wall of the inner tube is provided with an external thread, and the inner wall of the outer tube is provided with an internal thread. When the inner tube is placed in the first position, the external thread and the internal thread are threadedly connected.

[0016] Unlike existing technologies, the above technical solution utilizes a sliding sleeve connection between the inner and outer tubes, allowing the inner tube to reciprocate between a first and a second position, while simultaneously enabling the expansion member to expand, contract, or rotate. The expansion member can switch positions according to the inner tubes, thereby achieving the hooking and securing of the ureteral catheter. This design simplifies the operation and improves the efficiency and success rate of ureteral catheter removal.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 The outer tube is sleeved on the inner tube as described in the specific implementation diagram;

[0020] Figure 2 This is a flowchart illustrating the sliding process of the inner tube as described in the specific implementation method.

[0021] Figure 3 The inner tube structure diagram is rotated for a specific implementation method;

[0022] Figure 4 The inner tube structure diagram is shown in the illustration for a specific implementation method;

[0023] Figure 5 This is a top view of the connector and expansion member in a specific embodiment.

[0024] Explanation of reference numerals in the attached figures:

[0025] a) First position; b) Second position;

[0026] 10. Inner tube; 20. Outer tube; 30. Fixing part; 40. Connecting part; 50. Expansion part. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0033] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0035] Please see Figures 1 to 5 This embodiment provides a device for retrieving a ureteral catheter, comprising:

[0036] Inner tube 10;

[0037] The outer tube 20 is slidably sleeved on the inner tube 10, and the inner tube 10 reciprocates between a first position a and a second position b.

[0038] Fixing part 30;

[0039] A connector 40 is provided, one end of which is connected to the fixing part 30 and the other end of which is connected to the outer tube 20. There are multiple connectors 40 arranged in a ring array around the center of the inner tube 10 to form a receiving cavity. An expansion channel is provided between two adjacent connectors 40, and the expansion channel is connected to the receiving cavity.

[0040] An expansion member 50 is provided, with one end connected to the fixing part 30 and the other end connected to the inner tube 10. The expansion member 50 is a flexible expansion member. There are multiple expansion members 50 arranged in a ring array around the center of the inner tube 10, and the multiple expansion members 50 are staggered with the connecting member 40.

[0041] When the inner tube 10 is placed in the second position b, the expansion member extends out from the expansion channel; when the inner tube 10 is placed in the first position a, the expansion member is placed in the accommodating cavity.

[0042] The inner tube 10 is made of medical-grade silicone or rubber to ensure its strength and biocompatibility. Furthermore, the inner tube 10 is a solid inner tube.

[0043] The outer tube 20 is slidably sleeved on the inner tube 10. The material of the outer tube 20 is the same as that of the inner tube 10, meaning that the outer tube 20 also needs to have a certain rigidity so that the inner tube 10 can slide stably along the hole on the outer tube 20 under the action of external force. Furthermore, the inner tube 10 reciprocates between the first position a and the second position b, and the reciprocating motion between the first position a and the second position b corresponds to the contraction and expansion states of the device, respectively.

[0044] The connector 40 is fixedly connected to the fixing part 30, and the connector 40 is used to connect the fixing part 30 and the outer tube 20. Specifically, one end of the connector 40 is connected to the fixing part 30, and the other end is fixedly connected to the outer tube 20. Multiple connectors 40 are arranged in a circular array around the center of the inner tube 10 to enhance the stability of the device. Further, the accommodating cavity is formed in the middle of the multiple connectors 40 in the circular array, and the accommodating cavity is used to accommodate the expansion member 50 when the device contracts. An expansion channel (i.e., the gap between two adjacent connectors 40 is the expansion channel) is provided between two adjacent connectors 40, and the expansion channel communicates with the accommodating cavity to allow the expansion member 50 to extend when needed.

[0045] The expansion member 50 is made of a flexible material (such as medical-grade silicone or rubber) to allow it to expand or contract under external force. One end of the expansion member 50 is connected to the fixing part 30, and the other end is fixedly connected to the inner tube 10. Multiple expansion members 50 are arranged in a circular array around the center of the inner tube 10 and are staggered with the connecting member 40 to ensure that the expansion member 50 can unfold from the expansion channel when deployed, providing an expansion effect.

[0046] Furthermore, when the inner tube 10 is placed in the first position a, the plurality of connecting members 40 completely cover the plurality of expansion members 50, that is, the expansion members 50 are placed in the accommodating cavity; moving the inner tube 10 causes it to move to the second position b, causing the expansion members 50 to unfold from the expansion channel. Further, referring to... Figure 5 There are 3 expansion members and 3 connecting members 40.

[0047] In actual operation, in the initial state, the inner tube 10 is in the first position a, at which time the expansion member 50 is accommodated in the accommodating cavity, and the expansion member 50 is in a contracted state, which facilitates insertion into the urethra.

[0048] When the device reaches the target position, it pushes the inner tube 10, causing it to move to the second position b. As the inner tube 10 moves, the expansion member 50 extends and unfolds through the expansion channel. Because the expansion member 50 is flexible, multiple expansion members 50 can expand under external force, thereby allowing multiple expansion members 50 to contact the ureteral catheter or placing the ureteral catheter between two adjacent expansion members 50. Then, the inner tube 10 is rotated, causing the expansion members 50 to intertwine with the ureteral catheter, moving both the expansion members 50 and the ureteral catheter into the receiving cavity. Finally, the inner tube 10 is pulled back to the first position a; the device can then be easily withdrawn from the urethra, taking with it the ureteral catheter that needs to be retrieved.

[0049] Unlike existing technologies, the above technical solution utilizes the sliding connection between the inner tube 10 and the outer tube 20, allowing the inner tube 10 to reciprocate between a first position a and a second position b. Simultaneously, the expansion member 50 expands, contracts, or rotates. The expansion member 50 can switch positions according to the inner tube 10, thereby enabling the hooking and fixation of the ureteral catheter. This design simplifies the operation and improves the efficiency and success rate of ureteral catheter removal.

[0050] According to some embodiments of this application, refer to Figures 1 to 4 The end of the fixing part 30 away from the inner tube 10 is arc-shaped.

[0051] To facilitate insertion of the device into the bladder through the urethral opening, the top of the fixing part 30 is arc-shaped to prevent the device from scratching the urethra.

[0052] According to some embodiments of this application, refer to Figures 1 to 4 The outer wall of the inner tube 10 is provided with an external thread, and the inner wall of the outer tube 20 is provided with an internal thread. When the inner tube 10 is placed in the first position a, the external thread and the internal thread are threadedly connected.

[0053] The external and internal threads enable a stable connection between the outer tube 20 and the inner tube 10. Specifically, the inner wall of the outer tube 20 is provided with an internal thread that matches the external thread. When the inner tube 10 is moved to its first position a, the external and internal threads engage with each other, forming a tight threaded connection.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A device for retrieving a ureteral catheter, characterized in that, include: Inner tube; An outer tube is slidably sleeved on an inner tube, and the inner tube reciprocates between a first position and a second position. Fixing part; A connector, one end of which is connected to the fixing part and the other end of which is connected to the outer tube; there are multiple connectors arranged in a ring array around the center of the inner tube to form a receiving cavity, and there is an expansion channel between two adjacent connectors, and the expansion channel is connected to the receiving cavity; An expansion member, one end of which is connected to the fixing part and the other end of which is connected to the inner tube, is a flexible expansion member; there are multiple expansion members arranged in a ring array around the center of the inner tube, and the multiple expansion members are staggered with the connecting member; When the inner tube is in the second position, the expansion member extends out from the expansion channel; when the inner tube is in the first position, the expansion member is placed in the accommodating cavity.

2. The device for retrieving a ureteral catheter according to claim 1, characterized in that, There are 3 expansion components and 3 connecting components.

3. The device for retrieving a ureteral catheter according to claim 1, characterized in that, The inner tube is a solid inner tube.

4. The device for retrieving a ureteral catheter according to claim 1, characterized in that, The end of the fixing part away from the inner tube is arc-shaped.

5. The device for retrieving a ureteral catheter according to claim 1, characterized in that, The outer wall of the inner tube is provided with an external thread, and the inner wall of the outer tube is provided with an internal thread. When the inner tube is placed in the first position, the external thread and the internal thread are threadedly connected.

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