CN116407728B

CN116407728B - Urological catheterization device

Info

Publication number: CN116407728B
Application number: CN202310665853.6A
Authority: CN
Inventors: 赵楠; 李娟�; 相学园; 张丽峰; 刘国俊; 朱臻
Original assignee: Third Medical Center of PLA General Hospital
Current assignee: Third Medical Center of PLA General Hospital
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-08-25
Anticipated expiration: 2043-06-07
Also published as: CN116407728A

Abstract

The invention belongs to the technical field of medical appliances, and relates to a urinary catheterization device. The invention comprises a catheter and a plug; the plug has a hollow structure, and one end of the plug is in plug-in fit with the catheter; the other end of the plug is communicated with the urine receiving bag through a hose; a cutting component is arranged between the catheter and the plug. After the device is used, in the process of separating the plug from the catheter, the volume of a closed space enclosed by the catheter, the catheter connector, the plug and the hose is gradually increased, so that the air pressure in the closed space is gradually reduced, and then the arc-shaped rod slides into the arc-shaped sliding cavity, so that the cutting knife rotates leftwards. The upper end of the cutting knife extends to the outside of the groove and pierces the side wall of the catheter joint. Then the upper end of the cutting knife penetrates through the side wall of the catheter connector, and the cutting knife cuts the side wall of the catheter connector along with the separation of the plug and the catheter, so that the catheter is prevented from being recycled, the device is simple in structure, and the manufacturing and assembling processes of the device are simple.

Description

Urological catheterization device

Technical Field

The invention belongs to the technical field of medical appliances, and relates to a urinary catheterization device.

Background

A urinary catheter is a conduit that is inserted from the urethra into the bladder in order to drain urine. Urinary catheters are mainly used for patients with urinary retention or bladder outlet obstruction, for patients with urinary incontinence, accurate detection of urine volume, unwilling or unable to collect urine, and for patients who need to lie in bed for a long period of time. The catheter plays an important role in urology, and in practical use, in order to reduce infection, the catheter is generally disposable and cannot be reused. If the catheter cannot be destroyed in time after being used for the first time, a plurality of lawbreakers can sell the used disposable catheter for the second time after processing, so that cross infection and disease transmission are easy to cause.

In the patent document with publication number CN112370586A, a disposable catheter based on urinary surgery is disclosed, which is provided with a cutting mechanism, and the cutting mechanism damages the catheter to prevent the catheter from being used secondarily when the plug is pulled out from the catheterization end after the disposable catheter is used. In the invention, when the plug is matched with the urethral catheterization end, the cutter is positioned in the arc-shaped bulge through the reset spring, the reset spring is a miniature spring, and the operation is not easy when the reset spring is assembled in the spring accommodating groove.

In order to solve the problems, the invention provides a urinary catheterization device.

Disclosure of Invention

In order to solve the problems in the background technology, the invention provides a urinary catheterization device.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

a urological catheterization device comprising: a urinary catheter and a plug; the plug has a hollow structure, and one end of the plug is in plug-in fit with the catheter; the other end of the plug is connected with a urine bag through a hose;

a cutting assembly is arranged between the catheter and the plug, the cutting assembly comprises a cutting knife and an arc-shaped rod, a groove and an arc-shaped sliding cavity are formed in the plug, one end of the arc-shaped sliding cavity is communicated with the groove, and the other end of the arc-shaped sliding cavity is communicated with a hollow structure of the plug; the arc-shaped rod is fixedly connected with the cutting knife, the arc-shaped rod is in sealing sliding fit with the arc-shaped sliding cavity, and the cutting knife is matched with the groove;

the cross section of the groove is triangular, the side length of one side of the triangle, which is close to the hose, is larger than the length of the cutting knife, the side length of one side of the triangle, which is close to the catheter, is smaller than the length of the cutting knife, and the included angle between the two sides of the triangle is connected smoothly by an arc; the lower end of the cutting knife is positioned at the arc; the circle center of the arc sliding cavity coincides with the circle center of the arc; the cutting edge of the cutting knife faces the direction of the hose, and the plug is inserted into the catheter;

pinching the catheter and the hose by hands to enable the catheter, the hose and the plug to enclose a sealed space; the plug is enabled to outwards move relative to the catheter, the sealing space is enabled to be enlarged, the air pressure of the sealing space is enabled to be gradually reduced, the arc-shaped rod is enabled to inwards move along the arc-shaped sliding cavity, the cutting knife is enabled to rotate, the cutting knife stretches out of the groove to puncture the catheter, and then the catheter is cut along with the plug being pulled out.

Further, one end of the catheter is communicated with a catheter joint; the catheter joint is in plug-in fit with the plug; both the catheter and the catheter connector are made of hard materials.

Further, the plug is inserted into the inner side of the catheter joint, and the catheter joint is in interference fit with the plug.

Further, the arc-shaped rod and the cutting knife are of an integrated structure.

Compared with the prior art, the invention has the following beneficial effects: after the device is used, in the process of separating the plug from the catheter, the volume of a closed space enclosed by the catheter, the catheter connector, the plug and the hose is gradually increased, so that the air pressure in the closed space is gradually reduced, and then the arc-shaped rod slides into the arc-shaped sliding cavity, so that the cutting knife rotates leftwards. The upper end of the cutting knife extends to the outside of the groove and pierces the side wall of the catheter joint. Then the upper end of the cutting knife penetrates through the side wall of the catheter joint, and the cutting knife cuts the side wall of the catheter joint along with the separation of the plug and the catheter, so that the catheter is prevented from being reused.

The device simple structure, and the cutting component in the device can the integrated into one piece make, and recess and arc smooth chamber on the plug all can be along with plug one shot forming in the device, and the manufacturing and the assembly process of the device are all simpler.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged view of a portion a of fig. 1 in the present invention.

In the figure: 1. a plug; 2. a groove; 3. an arc sliding cavity; 4. a cutting knife; 5. an arc-shaped rod; 6. a hose; 7. a urine bag joint; 8. a urinary catheter; 9. a catheter joint.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 and 2, the technical scheme adopted by the invention is as follows: a urinary catheterization device comprises a catheter 8 and a plug 1. One end of the catheter 8 is provided with a catheter connector 9 which is in plug-in fit with the plug 1.

The plug 1 is of a hollow structure, and the plug 1 is communicated with the catheter 8 through the catheter connector 9. The plug 1 is inserted into the inner side of the catheter joint 9, and the plug 1 is in interference fit with the catheter joint 9. In use, the plug 1 is inserted into the catheter adapter 9.

The end of the plug 1 far away from the catheter 8 is communicated with a hose 6. The end of the hose 6 far away from the plug 1 is provided with a urine bag connector 7, the urine bag connector 7 is connected with a urine bag, and the hose 6 is communicated with the urine bag through the urine bag connector 7.

A cutting assembly is arranged between the plug 1 and the catheter adapter 9. When the plug 1 is pulled out of the catheter connector 9, the cutting assembly cuts the catheter connector 9, and the catheter 8 is prevented from being reused. The cutting assemblies have two, which are symmetrically arranged about the axis of the plug 1.

The cutting assembly comprises a cutting blade 4 and an arcuate bar 5. The cutting knife 4 is fixedly connected with one side of the arc-shaped rod 5 facing the catheter 8. In this embodiment, the cutter 4 and the arc-shaped rod 5 are integrally formed.

The plug 1 is symmetrically provided with grooves 2 matched with the cutting knives 4, and the openings of the grooves 2 deviate from the axial direction of the plug 1. The plug 1 is symmetrically provided with an arc sliding cavity 3 matched with an arc rod 5. The grooves 2 are in one-to-one correspondence with the arc sliding cavities 3, one end of each arc sliding cavity 3 is communicated with the corresponding groove 2, and the other end of each arc sliding cavity 3 is communicated with the hollow structure of the plug 1. The arc rod 5 is arranged in the arc sliding cavity 3 in a sealing sliding way. The cross section of the groove 2 is triangular, the side length of one side of the triangle, which is close to the hose 6, is larger than the length of the cutting knife 4, the side length of one side of the triangle, which is close to the catheter 8, is smaller than the length of the cutting knife 4, and the included angle between the two side edges of the triangle is connected smoothly by an arc. The lower end of the cutter 4 is located at the circular arc. The center of the arc sliding cavity 3 coincides with the center of the arc. The cutting edge of the cutter blade 4 faces in the direction of the hose 6.

Both the plug 1 and the catheter adapter 9 are made of hard materials. The urinary catheter 8 is made of a soft material.

When the plug 1 is separated from the catheter 8, one hand is needed to pinch one end of the catheter 8 close to the catheter connector 9, and the other hand is needed to pinch one end of the hose 6 close to the plug 1, so that the catheter 8, the plug 1, the catheter connector 9 and the hose 6 are enclosed into a closed space, and the space formed by the hollow structure of the plug 1 is larger. Pulling outwards by hand moves the plug 1 to the right relative to the catheter adapter 9, gradually separating the plug 1 from the catheter adapter 9. During this process the relative position of the hand and the catheter 8 or hose 6 is unchanged. The volume of the enclosed space surrounded by the catheter 8, the plug 1, the catheter connector 9 and the hose 6 gradually increases, so that the air pressure in the enclosed space gradually decreases, the arc-shaped rod 5 moves along the arc-shaped sliding cavity 3 in the direction away from the groove 2, the arc-shaped rod 5 drives the cutting knife 4 to rotate leftwards, and the upper end of the cutting knife 4 gradually extends out of the groove 2. After the upper end of the cutter 4 extends out of the groove 2, the upper end of the cutter 4 punctures the side wall of the catheter adapter 9 and then passes through the side wall of the catheter adapter 9. Then as the plug 1 moves to the right with respect to the catheter 8, the cutting blade 4 moves to the right with respect to the catheter hub 9 and cuts the side wall of the catheter hub 9.

Working principle:

when in use, the catheter connector 9 is inserted and sleeved on the outer side of the plug 1, and the catheter connector 9 is in interference fit with the plug 1. In the process of inserting, the catheter joint 9 can push the cutting knife 4 when touching the cutting knife 4, so that the cutting knife 4 drives the arc rod 5 to drive the arc rod 5 to slide along the arc sliding cavity 3, the cutting knife 4 is attached to the right side edge of the triangle, and at the moment, the cutting knife 4 is completely located in the groove 2, namely, the upper end of the cutting knife 4 is located in the groove 2. The state of the plugging completion is shown in fig. 1. And then can be connected with an external urine receiving bag through the urine bag connector 7.

After the use, pinch the one end of the catheter 8 near the catheter connector 9 with one hand, pinch the one end of the hose 6 near the plug 1 with the other hand, make both ends of the plug 1 sealed, make the catheter 8, the plug 1, the catheter connector 9, the hose 6 enclose into the airtight space, and the space formed by the hollow structure of the plug 1 is larger. The two hands are then pulled to the sides respectively, which moves the catheter 8 to the left, moves the hose 6 to the right, and thus moves the plug 1 to the right relative to the catheter connector 9. The plug 1 is gradually separated from the catheter adapter 9. During this process the relative position of the hand and the catheter 8 or hose 6 is unchanged. The volume of the closed space formed by encircling the catheter 8, the plug 1, the catheter connector 9 and the hose 6 gradually increases, so that the air pressure in the closed space gradually decreases, the arc-shaped rod 5 moves along the arc-shaped sliding cavity 3 in the direction deviating from the groove 2, the arc-shaped rod 5 drives the cutting knife 4 to enable the cutting knife 4 to rotate leftwards, and the upper end of the cutting knife 4 gradually stretches out of the groove 2. After the upper end of the cutter 4 extends out of the groove 2, the upper end of the cutter 4 punctures the side wall of the catheter adapter 9 and then passes through the side wall of the catheter adapter 9. Then, along with the rightward movement of the plug 1 relative to the catheter 8, the cutter 4 moves rightward relative to the catheter connector 9 and cuts the side wall of the catheter connector 9, so that the catheter 8 is damaged and the catheter 8 is prevented from being reused.

The device has a simple structure, the cutting assembly in the device can be manufactured by integral molding, the groove 2 and the arc sliding cavity 3 on the plug 1 in the device can be molded once along with the plug 1, and the manufacturing and assembling processes of the device are simple.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. A urological catheterization device, comprising: a urinary catheter (8) and a plug (1);

the plug (1) has a hollow structure, and one end of the plug (1) is in plug-in fit with the catheter (8); the other end of the plug (1) is connected with a urine receiving bag through a hose (6);

a cutting assembly is arranged between the catheter (8) and the plug (1), the cutting assembly comprises a cutting knife (4) and an arc-shaped rod (5), a groove (2) and an arc-shaped sliding cavity (3) are formed in the plug (1), one end of the arc-shaped sliding cavity (3) is communicated with the groove (2), and the other end of the arc-shaped sliding cavity (3) is communicated with the plug (1); the arc-shaped rod (5) is fixedly connected with the cutting knife (4), the arc-shaped rod (5) is in sealing sliding fit with the arc-shaped sliding cavity (3), and the cutting knife (4) is matched with the groove (2);

the cross section of the groove (2) is triangular, the side length of one side of the triangle, which is close to the hose (6), is larger than the length of the cutting knife (4), the side length of one side of the triangle, which is close to the catheter (8), is smaller than the length of the cutting knife (4), and the included angles between the two sides of the triangle are connected smoothly by circular arcs; the lower end of the cutting knife (4) is positioned at the arc; the circle center of the arc sliding cavity (3) coincides with the circle center of the arc; the cutting edge of the cutting knife (4) faces the direction of the hose (6), and the plug (1) is inserted into the catheter (8);

the catheter (8) and the hose (6) are pinched by hands, so that the catheter (8), the hose (6) and the plug (1) are enclosed into a sealed space; the plug (1) is enabled to move outwards relative to the catheter (8), the sealing space is enabled to be enlarged, the air pressure of the sealing space is enabled to be gradually reduced, the arc-shaped rod is enabled to move inwards along the arc-shaped sliding cavity (3), the cutting knife (4) is enabled to rotate, the cutting knife (4) stretches out of the groove (2) to puncture the catheter (8), and then the catheter (8) is cut along with the pulling-out of the plug (1).

2. A urological catheterization device according to claim 1, characterized in that:

one end of the catheter (8) is communicated with a catheter joint (9); the catheter joint (9) is in plug-in fit with the plug (1); both the catheter (8) and the catheter connector (9) are made of hard materials.

3. A urological catheterization device according to claim 2, characterized in that: the plug (1) is inserted into the inner side of the catheter joint (9), and the catheter joint (9) is in interference fit with the plug (1).

4. A urological catheterization device according to claim 1, characterized in that: the arc-shaped rod (5) and the cutting knife (4) are of an integrated structure.