Ureteral catheter taking-out mechanism
By designing sliding components for the inner and outer tubes, stable hooking and extraction of the ureteral catheter are achieved, solving the problems of expensive or easily slipping instruments in existing technologies, improving extraction efficiency and reducing the risk of urethral injury.
Patent Information
- Application Number
- CN202422736018.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In the present technology, instruments for removing ureteral catheters are expensive or difficult to operate, and are prone to slippage, which increases the risk of urethral injury.
A ureteral catheter removal mechanism was designed, including an inner tube, an outer tube, a fixing part, an expansion part, and a sliding part. The sliding part reciprocates on the inner tube, allowing the expansion part to switch between different positions, providing stable connection and expansion capability, and ensuring accurate hooking of the ureteral catheter.
The procedure was simplified, the efficiency and success rate of ureteral catheter removal were improved, and the risk of urethral injury was reduced.
Smart Images
Figure CN223504309U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ureteral technology, and in particular to a ureteral catheter removal mechanism. 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. Utility Model Content
[0005] In view of the above problems, this application provides a ureteral catheter removal mechanism to improve the efficiency of ureter removal while avoiding urethral injury.
[0006] To achieve the above objectives, this application provides a ureteral catheter removal mechanism, comprising:
[0007] Inner tube;
[0008] An outer tube is sleeved on an inner tube and includes a fixed part, an expansion part, and a sliding part. The sliding part is slidably sleeved on the inner tube. One end of the expansion part is connected to the fixed part, and the other end of the expansion part is connected to the sliding part. The sliding part reciprocates between a first position and a second position. The fixed part is fixedly connected to the end of the inner tube.
[0009] When the sliding part moves to the second position, the middle part of the expansion part expands away from the inner tube; when the sliding part moves to the first position, the expansion part covers the inner tube.
[0010] In the technical solution of this application embodiment, there are multiple expansion parts, and the multiple expansion parts are arranged in a ring array around the inner tube.
[0011] In the technical solution of this application embodiment, there are three expansion parts. When the sliding part is in the first position, the three expansion parts cover the inner tube.
[0012] In the technical solution of this application embodiment, the inner tube is a solid inner tube.
[0013] In the technical solution of this application embodiment, the expansion part is a flexible expansion part.
[0014] 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 sliding part is provided with an internal thread. When the sliding part is placed in the first position, the external thread and the internal thread are threadedly connected.
[0015] Unlike existing technologies, the above technical solution ensures a stable connection between the outer and inner tubes through the inclusion of a fixing part, an expansion part, and a sliding part. The expansion part provides the necessary expansion capacity, while the sliding part allows the expansion part to be adjusted in position as needed, enabling it to accurately hook the ureteral catheter when rotated clockwise or counterclockwise. The sliding part, which slides onto the inner tube and can reciprocate between a first and a second position, allows it to slide on the inner tube, enabling the expansion part to easily switch between different positions for effective hooking and fixation of the ureter. This design simplifies the operation and improves the efficiency and success rate of ureteral catheter removal. The fixing part, fixed to the end of the inner tube, keeps the outer tube relatively fixed to the inner tube, ensuring the expansion part remains stable under external force and preventing damage or deviation from its preset trajectory due to excessive expansion or contraction. It also allows the expansion part to smoothly expand and contract under the drive of the sliding part.
[0016] 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
[0017] 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:
[0018] Figure 1 The outer tube is sleeved on the inner tube as described in the specific implementation diagram;
[0019] Figure 2 This is a flowchart illustrating the sliding process of the sliding part in a specific embodiment.
[0020] Figure 3 A structural diagram of the rotating sliding part is provided for a specific embodiment.
[0021] Figure 4The diagram shows the structure of the sliding part for a specific implementation.
[0022] Explanation of reference numerals in the attached figures:
[0023] a) First position; b) Second position;
[0024] 10. Inner tube; 20. Outer tube;
[0025] 21. Fixed part; 22. Expanding part; 23. Sliding part. Detailed Implementation
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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).
[0032] 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.
[0033] 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.
[0034] Please see Figures 1 to 4 This embodiment provides a ureteral catheter removal mechanism, comprising:
[0035] Inner tube 10;
[0036] An outer tube 20 is sleeved on the inner tube 10, and the outer tube 20 includes a fixing part 21, an expansion part 22, and a sliding part 23. The sliding part 23 is slidably sleeved on the inner tube 10. One end of the expansion part 22 is connected to the fixing part 21, and the other end of the expansion part 22 is connected to the sliding part 23. The sliding part 23 reciprocates between a first position a and a second position b. The fixing part 21 is fixedly connected to the end of the inner tube 10.
[0037] When the sliding part 23 moves to the second position b, the middle part of the expansion part 22 expands away from the inner tube 10; when the sliding part 23 moves to the first position a, the expansion part 22 covers the inner tube 10.
[0038] The inner tube 10 is a cylindrical guide structure with a smooth outer surface to reduce friction and damage to the urethra, while also reducing friction between the inner tube 10 and the outer tube 20. Furthermore, in some embodiments, the inner tube 10 is a solid inner tube to improve the strength of the device.
[0039] The outer tube 20 includes a fixing part 21, an expansion part 22, and a sliding part 23. The fixing part 21 is located at one end of the outer tube 20 and is fixedly connected to the end of the inner tube 10 to ensure that the outer tube 20 and the inner tube 10 will not separate during operation. The expansion part 22 is petal-shaped or strip-shaped; preferably, the expansion part 22 is a petal-shaped structure that can unfold away from the inner tube 10 and can deform under external force. One end of the expansion part 22 is connected to the fixing part 21, and the other end is connected to the sliding part 23.
[0040] The sliding part 23 has an annular structure and is adapted to fit the inner tube 10 so as to be sleeved on the inner tube 10. The inner wall of the sliding part 23 is smoothly disposed and has an appropriate gap or tight connection with the inner tube 10. The sliding part 23 can reciprocate along the axial direction of the inner tube 10 under the action of external force, thereby causing the expansion part 22 to deform.
[0041] In actual operation, initially, the sliding part 23 is located in the first position a, and the expansion part 22 is in a contracted state, tightly covering the inner tube 10 to form a compact whole. When it is necessary to hook out the ureteral catheter, the doctor or operator will push the outer tube 20 upward, causing the sliding part 23 to move to the second position b. During this process, the expansion part 22 is stretched and compressed, and the middle part expands away from the inner tube 10, forming a shape similar to an open petal.
[0042] In some embodiments, the expansion portion 22 is a flexible expansion portion 22, such as silicone, rubber, etc.
[0043] Specifically, the device is inserted into the bladder through the urethral opening in a compact state. At this time, the sliding part 23 is in the first position a, and the expansion part 22 tightly covers the inner tube 10, reducing the size and space occupied by the device and facilitating smooth insertion. After the device reaches the predetermined position, the sliding part 23 is moved to the second position b by pushing the outer tube 20 upward. During this process, the expansion part 22 is stretched and compressed, and the middle part expands away from the inner tube 10 (i.e., the part of the expansion part 22 away from the fixing part 21 and the sliding part 23), forming a structure similar to an open petal. This design allows the expansion part 22 to better contact the ureteral catheter. After the expansion part 22 opens, the outer tube 20 is rotated. Due to the petal-like structure of the expansion part 22, its edge portion can hook onto the ureteral catheter. With appropriate rotation and pulling force, it can be ensured that the expansion part 22 firmly hooks onto the ureteral catheter and is not easily dislodged. After confirming that the expansion part 22 has hooked onto the ureteral catheter, the doctor or operator will pull down the outer tube 20 to fix the ureteral catheter. Finally, by simultaneously pulling the inner and outer tubes 20, the ureteral catheter can be pulled out of the body.
[0044] Unlike existing technologies, the above technical solution ensures a stable connection between the outer tube 20 and the inner tube 10 through the fixing part 21, the expansion part 22, and the sliding part 23. The expansion part 22 provides the necessary expansion capacity, while the sliding part 23 allows the expansion part 22 to be adjusted in position as needed, enabling it to accurately hook the ureteral catheter. The sliding part 23, which slides onto the inner tube 10 and can reciprocate between a first position a and a second position b, allows it to slide on the inner tube 10, enabling the expansion part 22 to easily switch between different positions as needed, thereby achieving effective hooking and fixation of the ureteral catheter. This design simplifies the operation and improves the efficiency and success rate of ureteral catheter removal. The fixing part 21 is fixed to the end of the inner tube 10, so that the outer tube 20 is relatively fixed to the inner tube 10. This ensures that the expansion part 22 can remain stable when subjected to external force and will not be damaged or deviate from the preset trajectory due to excessive expansion or contraction. At the same time, it also allows the expansion part 22 to smoothly expand and contract under the drive of the sliding part 23.
[0045] According to some embodiments of this application, refer to Figures 2 to 3 The expansion portions 22 are multiple, and the multiple expansion portions 22 are arranged in a ring array around the inner tube 10. When the sliding portion 23 is in the first position a, three of the expansion portions 22 cover the inner tube 10.
[0046] The number of expansion portions 22 is multiple, and the multiple expansion portions 22 are arranged in a circular array around the inner tube 10. This makes the expansion portions 22 expand more uniformly, thereby better hooking and fixing the ureteral catheter. In this embodiment, the number of expansion portions 22 is preferably three.
[0047] Each of the expansion portions 22 has the same structure and function, that is, one end of each expansion portion 22 is connected to the fixed portion 21, and the other end is connected to the sliding portion 23. When the sliding portion 23 slides on the inner tube 10, the multiple expansion portions 22 will deform simultaneously.
[0048] In order to ensure that the three expansion parts 22 can evenly cover the inner tube 10, when the sliding part 23 is in the first position a, the edges of the three expansion parts 22 are in contact with each other to ensure that the three expansion parts 22 can fit tightly around the inner tube 10.
[0049] When the ureteral catheter retraction device is needed, first ensure that the sliding part 23 is in the first position a. At this time, the three expansion parts 22 will tightly surround the inner tube 10, forming a relatively compact structure, which facilitates the smooth insertion of the device into the bladder.
[0050] When the predetermined position is reached, the sliding part 23 is slidable, causing it to move from the first position a to the second position b. As the sliding part 23 moves, the three expansion parts 22 begin to expand outward, gradually moving away from the inner tube 10. Since the expansion parts 22 are arranged in a ring array around the inner tube 10, the multiple expansion parts 22 expand outward.
[0051] When it is necessary to remove the ureteral catheter, simply rotate the sliding part 23 so that the expansion part 22 wraps around the inner tube 10 and the ureteral catheter. Then, move it back from the second position b to the first position a, and the three expansion parts 22 will once again cover the inner tube 10, restoring a compact structure to secure the ureteral catheter. In this way, the device can be easily removed from the bladder.
[0052] According to some embodiments of this application, refer to Figures 1 to 3 The outer wall of the inner tube 10 is provided with an external thread, and the inner wall of the sliding part 23 is provided with an internal thread. When the sliding part 23 is placed in the first position a, the external thread and the internal thread are threadedly connected.
[0053] The presence of both external and internal threads ensures a stable connection between the outer tube 20 and the inner tube 10. Specifically, the inner wall of the sliding part 23 is provided with internal threads that match these external threads. When the sliding part 23 is moved to its first position a, these external and internal threads engage with each other, forming a tight threaded connection.
[0054] During operation, when it is necessary to retrieve the ureteral catheter, first ensure that the sliding part 23 is in its first position a. In this position, the internal thread of the sliding part 23 tightly engages with the external thread of the inner tube 10, thus forming a stable connection between the sliding part 23 and the inner tube 10. At this time, the expansion part 22, due to being clamped by the sliding part 23 and the fixing part 21, will cover the inner tube 10, forming a relatively compact structure.
[0055] When expansion of the expansion section 22 is required, the sliding section 23 can be operated to slide along the inner tube 10 to the second position b. During this movement, the threaded connection between the sliding section 23 and the inner tube 10 is gradually released, and the expansion section 22 expands away from the inner tube 10. This expansion allows the expansion section 22 to better contact the ureteral catheter, thereby achieving the purpose of hooking out the catheter. Then, the sliding section 23 can be moved back to its first position a, at which point the expansion section 22 hooks onto the ureteral catheter, and the expansion section 22 and the ureteral catheter are wrapped around the inner tube 10.
[0056] 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 ureteral catheter removal mechanism, characterized in that, include: Inner tube; An outer tube is sleeved on an inner tube and includes a fixed part, an expansion part, and a sliding part. The sliding part is slidably sleeved on the inner tube. One end of the expansion part is connected to the fixed part, and the other end of the expansion part is connected to the sliding part. The sliding part reciprocates between a first position and a second position. The fixed part is fixedly connected to the end of the inner tube. When the sliding part moves to the second position, the middle part of the expansion part expands away from the inner tube; when the sliding part moves to the first position, the expansion part covers the inner tube.
2. The ureteral catheter removal mechanism according to claim 1, characterized in that, The expansion section is a plurality of parts, and the plurality of expansion sections are arranged in a ring array around the inner tube.
3. The ureteral catheter removal mechanism according to claim 2, characterized in that, There are three expansion parts. When the sliding part is in the first position, the three expansion parts cover the inner tube.
4. The ureteral catheter removal mechanism according to claim 1, characterized in that, The inner tube is a solid inner tube.
5. The ureteral catheter removal mechanism according to claim 1, characterized in that, The expansion portion is a flexible expansion portion.
6. The ureteral catheter removal mechanism 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 sliding part is provided with an internal thread. When the sliding part is in the first position, the external thread and the internal thread are threadedly connected.