Outer liner tube for assisting imbedding of hard ureteroscope

Abstract

The utility model relates to the field of medical apparatus and instruments, and discloses an outer liner tube for assisting the placement of a hard ureteroscope, which comprises a tube body with a circular-ring-shaped section, and the inner diameter of the tube body corresponds to the outer diameter of an insertion tube of the hard ureteroscope; the reducing end is arranged at the front end of the tube body, and the reducing end and the tube body are integrally formed, so that the reducing end and a ureteroscope are limited and fixed; the tube seat is arranged at the tail end of the tube body. According to the utility model, the resistance of the hard ureteroscope during insertion can be reduced, and the friction and stimulation injury of the hard ureteroscope to surrounding tissues can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an outer liner tube for assisting in the insertion of a rigid ureteroscope. Background Technology

[0002] Urinary tract stones are a common disease in urology, and their incidence has been gradually increasing in recent years. With the development of diagnostic and treatment technologies, traditional open surgery has been replaced by various minimally invasive treatment methods in the field of stone treatment. Ureteroscopic surgery is mainly used for lithotripsy and stone removal in the middle and lower ureter. It has advantages such as simple operation, safety, non-invasiveness, rapid patient recovery, and high stone clearance rate, greatly reducing patient suffering and the occurrence of complications.

[0003] Currently, the conventional rigid ureteroscope has a relatively large and inflexible insertion diameter. In rigid ureteroscopic lithotripsy, the rigid ureteroscope needs to be inserted from the urethra into the bladder and then into the ureter. The insertion process is quite tortuous, and the space in the ureter is relatively small compared to the urethra and bladder. The tip of the rigid endoscope will dilate the urethra and ureter, causing greater damage to the tissues around the urethra, resulting in strong stimulation or even damage to the ureter. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide an outer liner tube that assists in the insertion of a rigid ureteroscope, thereby reducing resistance during insertion and minimizing friction and irritation to surrounding tissues.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an outer liner tube for assisting in the insertion of a rigid ureteroscope, comprising: a tube body with a circular cross-section, the inner diameter of which corresponds to the outer diameter of the insertion tube of the rigid ureteroscope; a variable diameter end, which is located at the front end of the tube body and integrally formed with the tube body to limit and fix it with the rigid ureteroscope; and a tube seat, which is located at the end of the tube body.

[0006] Furthermore, the outer wall surface of the variable diameter end adopts a tapering structure from back to front; the inner wall surface of the cross-section of the variable diameter end adopts a stepped structure or a narrowing structure.

[0007] Furthermore, the insertion tube of the rigid ureteroscope has a tapered step structure at its tip, including a small-diameter section at the very front and a tapered section integrally formed with the small-diameter section; the constricted end of the tapered section is connected to the small-diameter section, and the other end of the tapered section is integrally connected to the insertion tube.

[0008] Furthermore, the stepped structure or constricted structure at the variable diameter end engages with the tapered stepped structure at the front end of the insertion tube for locking.

[0009] Furthermore, the inner wall of the cross-section of the variable diameter end adopts a stepped structure, which is formed by connecting the first smooth section, the variable diameter section and the second smooth section in sequence, and integrally molded.

[0010] The first smooth section is set in a corresponding manner to the small-diameter section at the front end of the insertion tube;

[0011] The variable diameter section is set in a corresponding manner to the tapered section at the front end of the insertion tube;

[0012] The second smooth section is integrally formed with the inner wall of the tube and is positioned correspondingly to the insertion tube.

[0013] Furthermore, the pipe body and the reducing end are made of PP, PE, PA or Pebax polymer materials.

[0014] Furthermore, a hydrophilic coating and lubricant are applied to the outer surfaces of the tube body and the reducing end.

[0015] Furthermore, the pipe body and the reducing end are made of PTFE, FEP, ETFP, PI or PEEK materials.

[0016] Furthermore, the tube seat adopts a structure that is integrally formed with the end of the tube body.

[0017] Furthermore, the tube seat adopts a separate structure from the tube body; the tube seat is fixedly connected to the end of the tube body.

[0018] Due to the adoption of the above technical solutions, this utility model has the following advantages: This utility model can effectively reduce the resistance during the insertion of the rigid ureteroscope, enabling the rigid ureteroscope to be inserted smoothly and easily, reducing the friction and irritation damage of the rigid endoscope to the surrounding tissues, and ensuring the safety of the surgical procedure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the outer liner tube for assisting in the insertion of a rigid ureteroscope in an embodiment of this utility model;

[0020] Figure label:

[0021] 1-Rigid ureteroscope, 11-Insertion tube of rigid ureteroscope, 12-Tip of insertion tube of rigid ureteroscope;

[0022] 2-pipe body, 21-reducing end, 22-pipe seat of the outer lining pipe. Detailed Implementation

[0023] To reduce adverse reactions caused by irritation and damage to the urethra and ureter during ureteroscopic insertion, this invention provides an auxiliary liner for ureteroscopic insertion. The liner includes a tube body with a circular cross-section, the inner diameter of which corresponds to the outer diameter of the ureteroscopic end. A reducing end, integrally formed with the tube body, is located at the front end of the tube body and is used for positioning and fixing the ureteroscopic end, reducing resistance during insertion. A tube seat is located at the end of the tube body, and external force is applied to the tube seat to ensure that the tube 2 does not dislodge. This invention effectively reduces resistance during ureteroscopic insertion, allowing for smooth and fluid insertion, reducing friction and irritation to surrounding tissues, and ensuring the safety of the surgical procedure.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] In one embodiment of this utility model, such as Figure 1 As shown, an external liner for assisting in the insertion of a rigid ureteroscope is provided. In this embodiment, the external liner includes:

[0027] The tube body 2 has a circular cross-section, and its inner diameter is set to correspond to the outer diameter of the insertion tube 11 of the ureteroscope 1.

[0028] The variable diameter end 21 is located at the front end of the tube body 2 and is integrally formed with the tube body 2. It is used to limit and fix the rigid ureteroscope 1, thereby reducing the resistance when the rigid ureteroscope 1 is inserted.

[0029] The tube seat 22 is located at the end of the tube body 2. External force is applied to the tube seat 22 to ensure that the tube body 2 will not fall off.

[0030] In use, the rigid ureteroscope 1 is inserted into the tube body 2, and the front end 12 of the insertion tube of the rigid ureteroscope 1 is limited and fixed by the reducing end 21 to prevent relative sliding between the outer liner and the rigid ureteroscope 1. External force is applied to the tube seat 22 to further ensure the stability of the outer liner during insertion of the rigid ureteroscope 1, preventing the outer liner from falling off and allowing the rigid ureteroscope 1 to be inserted smoothly and easily.

[0031] In a preferred embodiment, the outer wall of the variable diameter end 21 adopts a tapering structure from back to front; the inner wall of the cross-section of the variable diameter end 21 adopts a stepped structure or a narrowing structure.

[0032] Among them, the insertion tube 12 of the rigid ureteroscope 1 has a tapered step structure, including a small diameter section at the front end and a tapered section integrally formed with the small diameter section; the constricted end of the tapered section is connected to the small diameter section, and the other end of the tapered section is integrally connected with the insertion tube 11.

[0033] In this embodiment, the stepped structure or narrowing structure of the variable diameter end 21 cooperates with the tapered stepped structure of the insertion tube front end 12 of the rigid ureteroscope 1 to achieve locking, effectively preventing the outer liner tube from sliding relative to the insertion tube 11 of the rigid ureteroscope 1.

[0034] Preferably, the inner wall of the cross-section of the variable diameter end 21 adopts a stepped structure, which is formed by sequentially connecting a first smooth section, a variable diameter section, and a second smooth section, and integrally molded. The first smooth section is arranged in a corresponding manner to the small diameter section of the front end 12 of the insertion tube, the variable diameter section is arranged in a corresponding manner to the tapered section of the front end 12 of the insertion tube, and the second smooth section is integrally molded with the inner wall of the tube body 2 and is arranged in a corresponding manner to the insertion tube 11.

[0035] In use, the first smooth section, the variable diameter section, and the second smooth section are sequentially matched with the insertion end 12 and the insertion tube 11 of the rigid ureteroscope 1, respectively. During insertion, a tight fit between the outer liner and the rigid ureteroscope 1 can be achieved, ensuring safe use. At the same time, the tapering structure of the outer wall of the variable diameter end 21 from back to front achieves a transition fit with the tip of the insertion end 12, effectively reducing the need for insertion.

[0036] In a preferred embodiment, the tube body 2 and the reducing end 21 are made of polymer materials such as PP, PE, PA or Pebax.

[0037] In this embodiment, the outer surfaces of the tube body 2 and the variable diameter end 21 are coated with a hydrophilic coating and a lubricant to reduce tissue friction during insertion and prevent irritation and damage to surrounding tissues.

[0038] Optionally, the tube body 2 and the reducing end 21 are made of materials with low coefficients of friction, such as PTFE, FEP, ETFP, PI, or PEEK. In this embodiment, hydrophilic coatings and lubricants are no longer applied to the outer surfaces of the tube body 2 and the reducing end 21. The low coefficient of friction inherent in the materials of the tube body 2 and the reducing end 21 reduces friction with tissues during insertion.

[0039] In a preferred embodiment, the tube seat 22 can be integrally formed with the end of the tube body 2, or it can be a separate structure from the tube body 2. In the latter case, the tube seat 22 can be fixedly connected to the end of the tube body 2. During use, the tube seat 22 serves as a handle, allowing it to be held and fixed to the rigid ureteroscope 1 to prevent the outer liner from falling off.

[0040] In summary, when using this invention, the rigid ureteroscope 1 is inserted into the outer liner tube. The reducing end 21 of the outer liner tube body 2 is fixed to the reducing end 12 of the insertion tube of the rigid ureteroscope 1. The user prevents the outer liner tube from falling off by holding the outer liner tube seat 22 or other fixing methods. Then, the rigid ureteroscope 1 and the outer liner tube are inserted together into the urethra and finally into the ureter. During the insertion process, the hydrophilic coating, lubricant, and other substances on the surface of the outer liner tube reduce tissue friction and prevent irritation and damage to surrounding tissues.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An external liner for assisting in the insertion of a rigid ureteroscope, characterized in that, include: The tube body (2) has a circular cross-section and its inner diameter is set in a manner corresponding to the outer diameter of the insertion tube (11) of the ureteroscope (1); The variable diameter end (21) is set at the front end of the tube body (2) and is integrally formed with the tube body (2) to limit and fix it with the rigid ureteroscope (1); The tube seat (22) is located at the end of the tube body (2).

2. The liner tube for assisting ureteroscopic insertion as described in claim 1, characterized in that, The outer wall of the variable diameter end (21) adopts a tapering structure from back to front; the inner wall of the cross section of the variable diameter end (21) adopts a stepped structure or a narrowing structure.

3. The liner tube for assisting ureteroscopic insertion as described in claim 2, characterized in that, The insertion tube of the rigid ureteroscope (1) has a tapered step structure at the front end (12), including a small diameter section at the front end and a tapered section integrally formed with the small diameter section; the constricted end of the tapered section is connected to the small diameter section, and the other end of the tapered section is connected to the insertion tube (11) as one piece.

4. The liner tube for assisting ureteroscopic insertion as described in claim 3, characterized in that, The stepped structure or constricted structure of the variable diameter end (21) is engaged with the tapered stepped structure of the front end (12) of the insertion tube.

5. The liner tube for assisting ureteroscopic insertion as described in claim 3, characterized in that, The inner wall of the cross section of the variable diameter end (21) adopts a stepped structure consisting of a first smooth section, a variable diameter section and a second smooth section connected in sequence and integrally formed; The first smooth section is set in a corresponding manner to the small diameter section at the front end (12) of the insertion tube; The variable diameter section is set in a corresponding manner to the tapered section at the front end (12) of the insertion tube; The second smooth section is integrally formed with the inner wall of the tube body (2) and is set in a corresponding manner with the insertion tube (11).

6. The liner tube for assisting ureteroscopic insertion as described in claim 1, characterized in that, The tube body (2) and the reducing end (21) are made of PP, PE, PA or Pebax polymer materials.

7. The liner tube for assisting ureteroscopic insertion as described in claim 6, characterized in that, The outer surfaces of the tube body (2) and the reducing end (21) are coated with a hydrophilic coating and a lubricant.

8. The liner tube for assisting ureteroscopic insertion as described in claim 1, characterized in that, The tube body (2) and the reducing end (21) are made of PTFE, FEP, ETFP, PI or PEEK materials.

9. The liner tube for assisting ureteroscopic insertion as described in claim 1, characterized in that, The tube seat (22) adopts a structure that is integrally formed with the end of the tube body (2).

10. The liner tube for assisting ureteroscopic insertion as described in claim 1, characterized in that, The tube seat (22) adopts a separate structure from the tube body (2); the tube seat (22) is fixedly connected to the end of the tube body (2).

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