External super-smooth sheath for hard ureteroscope

Abstract

The utility model relates to an external super-smooth sheath for a hard ureteroscope. The external super-smooth sheath comprises a main sheath tube, a sheath tube joint, a negative pressure joint and an inner core, the sheath tube connector is connected to the rear end of the main sheath tube, the sheath tube connector is in a horn shape and can be conveniently matched with a connecting part at the rear end of the inner core, and the negative pressure connector is connected with the sheath tube connector to form an inclined three-way structure; the main sheath tube is a rubber tube or a silicone tube of a single-cavity structure and mainly comprises a tube body, an outer super-smooth coating and an inner super-smooth coating, the outer super-smooth coating is coated on the outer side of the tube body, and the outer super-smooth coating is in sliding fit with the urethra and the ureteral duct of a patient; the inner side of the pipe body is coated with the inner ultra-smooth coating, and the inner ultra-smooth coating is matched with the inner core. The outer side of the main sheath tube is provided with the outer super-smooth coating with hydrophilic super-smooth characteristics, and the outer super-smooth coating is in sliding fit with the urethra and the ureteral duct of a patient; the super-smooth effect is achieved, friction force can be reduced, and damage to tissue of a patient is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to an external super-slippery sheath for a rigid ureteroscope. Background Art

[0002] Ureteroscope surgery enters the ureter and kidney through the urethra and bladder, and uses the ureteroscope for examination and treatment. This surgical method avoids the large trauma and high risk brought by traditional open surgery. Ureteroscope surgery is widely used in the treatment of diseases such as ureteral calculi, ureteral stricture, upper urinary tract tumors, etc. Especially for middle and lower ureteral calculi, ureteroscope surgery has significant therapeutic effects.

[0003] In the prior art, ureteroscopes are roughly divided into two types: rigid scopes and flexible scopes. The outer shell of the flexible scope is made of soft material and can be bent; while the rigid ureteroscope is made of stainless steel material (such as Figure 1 ). The stainless steel rigid ureteroscope has stable chemical properties and can be disinfected by high-temperature steaming to achieve the purpose of repeated use. However, after repeated disinfection, the outer surface of the ureteroscope catheter changes from a smooth surface to a rough surface, and the rough surface has poor lubricity, resulting in greater friction with the patient's ureter and increasing tissue damage to the patient; there are certain risks and complications, and common complications include infection, bleeding, urethral injury, bladder injury, ureteral injury, and kidney injury, etc. Content of the Utility Model

[0004] The purpose of the utility model is to provide an external super-slippery sheath for a rigid ureteroscope, aiming to overcome the defects of the prior art and solve the problem that the outer surface of the ureteroscope catheter changes from smooth to rough, increasing tissue damage to the patient.

[0005] To this end, the utility model proposes an external super-slippery sheath for a rigid ureteroscope, including: a main sheath tube, a sheath tube joint, a negative pressure joint, and an inner core; the sheath tube joint is connected to the rear end of the main sheath tube, and the sheath tube joint is in a horn shape, which is convenient for cooperating with the connecting part at the rear end of the inner core. The negative pressure joint is connected to the sheath tube joint to form an inclined tee structure; the main sheath tube is a rubber tube or a silicone tube with a single cavity structure, mainly including: a tube body, an outer super-slippery coating, and an inner super-slippery coating. The outer super-slippery coating is coated on the outside of the tube body, and the outer super-slippery coating slides and cooperates with the patient's urethra and ureteral duct; the inner super-slippery coating is coated on the inside of the tube body, and the inner super-slippery coating cooperates with the inner core.

[0006] As a preferred technical solution of the present application, both the outer super-slippery coating and the inner super-slippery coating are made of PVP material and have hydrophilic super-slippery characteristics.

[0007] As a preferred technical solution of the present application, the negative pressure connector has a flared mouth for connecting with a commonly used negative pressure aspirator in hospitals.

[0008] As a preferred technical solution of the present application, the central axis of the negative pressure connector forms an angle of about 60° with the central axis of the main sheath tube.

[0009] As a preferred technical solution of the present application, an elastic plug is provided at the end of the sheath tube connector. The elastic plug is in a closed state under natural conditions and can be opened under a stretched state.

[0010] As a preferred technical solution of the present application, the elastic plug is a disk-shaped structure as a whole, and the elastic plug is divided into strip-shaped structures by a planar spiral. At the same time, the outer ring of the elastic plug is integrally connected to the end of the sheath tube connector.

[0011] As a preferred technical solution of the present application, a circular boss is formed at the exact middle position of the elastic plug, and the circular boss protrudes from the plane of the elastic plug.

[0012] As a preferred technical solution of the present application, an elastic buckle is installed on the connecting part at the rear end of the inner core, and a pair of bayonets are provided at the outer circumference of the end of the sheath tube connector; the elastic buckle cooperates with the pair of bayonets.

[0013] As a preferred technical solution of the present application, the cross-section of the inner core is an elliptical ring shape, which matches the shape of the catheter of the ureteroscope.

[0014] As a preferred technical solution of the present application, the cross-sectional shape of the main sheath tube is a circular ring shape.

[0015] For the external super-smooth sheath of the ureteroscope provided by the present utility model, an external super-smooth coating with hydrophilic super-smooth characteristics is provided on the outside of the main sheath tube, which slides in cooperation with the urethra and ureteral ducts of the patient; it has a super-smooth effect, can reduce the frictional force, and reduces the damage to the patient's tissues; an internal super-smooth coating with hydrophilic super-smooth characteristics is provided on the inside of the main sheath tube, which facilitates the rapid insertion of the inner core into the main sheath tube; by providing an elastic plug at the end of the sheath tube connector, rapid opening and closing can be achieved, and when the negative pressure connector installed on the sheath tube connector is connected to the negative pressure aspirator, a better effect can be achieved.

[0016] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0018] Figure 1 is a schematic structural view of the rigid ureteroscope of the present utility model;

[0019] Figure 2 is a schematic structural view of the external super-slippery sheath of the rigid ureteroscope of the present utility model;

[0020] Figure 3 is a schematic structural view of the inner core in the external super-slippery sheath of the rigid ureteroscope of the present utility model;

[0021] Figure 4 is a schematic structural view of the main sheath tube in the external super-slippery sheath of the rigid ureteroscope of the present utility model;

[0022] Figure 5 is a partially enlarged sectional view of the main sheath tube in the external super-slippery sheath of the rigid ureteroscope of the present utility model;

[0023] Figure 6 is a left side view of the elastic plug in the external super-slippery sheath of the rigid ureteroscope of the present utility model;

[0024] Description of reference numerals

[0025] 1. Main sheath tube; 2. Sheath tube joint; 3. Negative pressure joint; 11. External super-slippery coating; 12. Tube body; 13. Internal super-slippery coating; 21. Bayonet; 22. Elastic plug; 23. Circular boss; 4. Inner core; 41. Elastic buckle; 10. Rigid ureteroscope. Detailed implementation manners

[0026] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail this application.

[0027] As Figures 2 to 6 shown, the external super-slippery sheath of the rigid ureteroscope of the present utility model includes a main sheath tube 1, a sheath tube joint 2, a negative pressure joint 3 and an inner core 4; wherein, the cross-section of the inner core 4 is an elliptical ring shape, which is matched with the shape of the catheter of the rigid ureteroscope 10. The cross-section of the main sheath tube 1 is a circular ring shape. The sheath tube joint 2 is connected to the rear end of the main sheath tube 1. The sheath tube joint 2 is in a horn shape, which is convenient for cooperating with the connecting part at the rear end of the inner core 4. The negative pressure joint 3 is a bifurcated joint of the sheath tube joint 2. The negative pressure joint 3 can be connected to a negative pressure aspirator. The central axis of the negative pressure joint 3 forms an angle of about 60° with the central axis of the main sheath tube 1, thus forming a structure similar to an inclined tee.

[0028] Specifically, the main sheath tube 1 is a rubber tube or a silicone tube with a single-lumen structure. Its main structure includes a tube body 12, an outer super-slippery coating 11, and an inner super-slippery coating 13. The outer super-slippery coating 11 is coated on the outside of the tube body 12 and is in sliding fit with the patient's urethra and ureteral ducts; the inner super-slippery coating 13 is coated on the inside of the tube body 12 and is in fit with the inner core 4.

[0029] Both the outer super-slippery coating 11 and the inner super-slippery coating 13 are made of PVP material and have hydrophilic super-slippery characteristics. Before inserting the rigid ureteroscope into the urethra, first insert the main sheath tube 1 of the present application into it. The outer super-slippery coating 11 is a lubricating coating with a super-slippery effect, which can reduce the friction force.

[0030] Such as Figure 1 、 Figure 5 As shown, the negative pressure connector 3 has a flared opening and can be connected to a commonly used negative pressure aspirator in the hospital, which is used to adsorb the waste in the patient's bladder or renal pelvis and increase the clarity during the observation process of the rigid ureteroscope.

[0031] During this process, in order to make the negative pressure aspirator achieve a better effect, the sheath tube connector 2 needs to maintain a certain degree of sealing. Therefore, an elastic plug 22 is provided at the end of the sheath tube connector 2. The elastic plug 22 is in a closed state under natural conditions and can be opened under a stretched state, so that the sheath tube connector 2 is in fit with the end of the inner core 4.

[0032] The elastic plug 22 is a disk-shaped structure as a whole, and the elastic plug 22 is divided into strip-shaped structures by a planar spiral, and the outer ring of the elastic plug 22 is integrally connected to the end of the sheath tube connector 2. The elastic plug 22 will automatically contract to form a disk-shaped structure without external force, achieving a simple sealing effect. When an external force is applied to the elastic plug 22 by the user, a flat wire will be generated, which is convenient for the sheath tube connector 2 to be in fit with the end of the inner core 4.

[0033] Among them, a circular boss 23 is formed at the exact middle position of the elastic plug 22. The circular boss 23 protrudes from the plane of the elastic plug 22. The design of the circular boss 23 can facilitate medical staff to quickly open the elastic plug 22.

[0034] In this case, an elastic buckle 41 is installed on the connecting part at the rear end of the inner core 4, and a pair of bayonets 21 are provided at the outer circumference of the end of the sheath tube connector 2; when the inner core 4 is inserted into the main sheath tube 1, the elastic buckle 41 is in fit with the pair of bayonets 21, ensuring the relative stability of the positions of the inner core 4 and the main sheath tube 1, avoiding mutual sliding between the two, and at the same time preventing the rigid ureteroscope 10 from slipping out.

[0035] The working principle and working process of the external super-slippery sheath of the rigid ureteroscope of the present utility model are briefly described below.

[0036] First, insert the sterilized rigid ureteroscope 10 into the inner core 4 to keep their positions relatively stable. Then, insert the inner core 4 with the rigid ureteroscope 10 into the main sheath 1, and make the elastic buckle 41 cooperate with a pair of bayonets 21, ensuring the relative stability of the positions of the inner core 4 and the main sheath 1, avoiding their mutual sliding, and at the same time preventing the rigid ureteroscope 10 from slipping out.

[0037] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A ureteroscope with an external super-smooth sheath, characterized in that: include: A main sheath tube (1), a sheath tube connector (2), a negative pressure connector (3) and an inner core (4); The sheath tube connector (2) is connected to the rear end of the main sheath tube (1). The sheath tube connector (2) is in a trumpet shape, which is convenient for matching with the connecting portion at the rear end of the inner core (4). The negative pressure connector (3) is connected to the sheath tube connector (2) to form an oblique three-way structure. The main sheath tube (1) is a rubber tube or a silicone tube with a single-lumen structure, and mainly comprises: a tube body (12), an outer super-slip coating (11) and an inner super-slip coating (13); the outer super-slip coating (11) is coated on the outer side of the tube body (12), and the outer super-slip coating (11) is slidably matched with the patient's urethra and ureter; the inner super-slip coating (13) is coated on the inner side of the tube body (12), and the inner super-slip coating (13) is matched with the inner core (4).

2. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: The outer super-slippery coating (11) and the inner super-slippery coating (13) are both made of PVP material and have hydrophilic super-slippery properties.

3. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: The negative pressure connector (3) has a bell mouth and is used to be connected to a negative pressure suction device commonly used in hospitals.

4. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: The central axis of the negative pressure joint (3) is about 60 degrees to the central axis of the main sheath tube (1).

5. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: An elastic plug (22) is provided at the end of the sheath tube connector (2), and the elastic plug (22) is in a closed state in a natural state and can be opened in a stretched state.

6. The external super-smooth sheath for rigid ureteroscope according to claim 5, characterized in that: The elastic plug (22) is a disc-shaped structure as a whole, and the elastic plug (22) is divided into strip structures by a plane spiral line, and the outer ring of the elastic plug (22) is integrally connected to the end of the sheath tube connector (2).

7. The external super-smooth sheath for ureteroscope according to claim 6, characterized in that: A circular boss (23) is formed in the middle of the elastic plug (22), and the circular boss (23) protrudes from the plane of the elastic plug (22).

8. The external super-smooth sheath for rigid ureteroscope according to claim 1, characterized in that: An elastic buckle (41) is installed on the connection part at the rear end of the inner core (4), and a pair of bayonet holes (21) are provided on the outer circumference of the end of the sheath tube joint (2); the elastic buckle (41) cooperates with the pair of bayonet holes (21).

9. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: The cross section of the inner core (4) is an elliptical ring, which matches the shape of the catheter of the ureteroscope (10).

10. The external super-smooth sheath for ureteroscope according to claim 1, characterized in that: The cross-sectional shape of the main sheath tube (1) is annular.

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