CN108785777B - Prevent peritoneal dialysis catheter of aversion - Google Patents

Abstract

The invention discloses a displacement-preventing peritoneal dialysis catheter. The catheter comprises an abdominal catheter and a bifurcated connecting pipe; barbs are arranged on the outer wall of the middle part of the abdominal catheter; Ground, the barb is covered with a soft film, and the soft film is used to isolate the human tissue and the barb, so as to facilitate the separation of the barb from the human tissue when the peritoneal dialysis catheter needs to be taken out, and reduce the pain of the patient. , shorten the wound healing time.

Description

A peritoneal dialysis catheter that prevents displacement

technical field

The invention belongs to the field of medical devices, in particular to a peritoneal dialysis catheter preventing displacement.

Background technique

Dialysis is a separation and purification technology that separates small molecules from biological macromolecules through the principle of small molecules diffusing into water (or buffer) through a semipermeable membrane. Dialysis therapy is a treatment method in which components (solutes or water) in body fluids are excreted from the body through a semipermeable membrane. Generally, it can be divided into two types: hemodialysis and peritoneal dialysis.

Peritoneal dialysis uses the peritoneum as a semi-permeable membrane, and uses gravity to infuse the prepared dialysate into the patient's peritoneal cavity through a catheter. In this way, there is a concentration gradient of solutes on both sides of the peritoneum, and the solute on the high-concentration side will move to the peritoneal cavity. The low concentration side moves (dispersion); the water moves from the hypotonic side to the hypertonic side (osmotic effect). By continuously replacing the peritoneal dialysate, the purpose of removing metabolites, toxic substances and correcting water and electrolyte balance disorders in the body is achieved.

Peritoneal dialysis is often used to treat acute or chronic kidney failure. During the dialysis treatment, the peritoneal dialysis catheter needs to be indwelled in the patient's abdomen for a long time to connect the inside and outside of the abdominal cavity for fluid exchange, which is conducive to the protection of residual renal function, and is also an effective renal replacement method. However, with the use of the existing peritoneal dialysis catheter, the peritoneal dialysis catheter will gradually shift under the action of the patient's daily activities, which will affect the dialysis efficiency and even increase the risk of bacterial infection of the patient;

After decades of continuous improvement, the current peritoneal dialysis catheter is provided with two polyester sleeves on the outside of the middle part, and the distance between the two polyester sleeves is 3-5 cm; during use, the two polyester sleeves are respectively Buried in the abdominal wall subcutaneously and in the rectus abdominis, it can fix the peritoneal dialysis catheter and prevent pathogenic microorganisms such as bacteria from invading the abdominal cavity from the catheter tunnel, and can also prevent the leakage of peritoneal dialysate; The fixation effect of the dialysis catheter still needs to be improved, and some patients still experience displacement of the peritoneal dialysis catheter.

Due to the above reasons, the present inventors have conducted in-depth research on the existing peritoneal dialysis catheters, in order to design a peritoneal dialysis catheter that can solve the above problems and prevent displacement.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned problems, the inventors have made keen research and designed a peritoneal dialysis catheter that prevents displacement. The catheter includes a peritoneal catheter and a bifurcated connecting pipe; the outer wall of the middle of the peritoneal catheter is provided with barbs; The peritoneal catheter is prevented from being displaced by the barb structure, and further, the barb is covered with a soft membrane, and the soft membrane is used to isolate the human tissue and the barb, so that when the peritoneal dialysis catheter needs to be taken out It is convenient to separate the barb from human tissue, reduces the pain of the patient, and shortens the wound healing time; thus the present invention is completed.

Specifically, the object of the present invention is to provide a peritoneal dialysis catheter for preventing displacement, which is characterized in that the peritoneal dialysis catheter comprises a peritoneal cavity catheter 1 and a bifurcated connecting pipe 2;

Barbs 3 are provided on the outer wall of the middle part of the abdominal catheter 1 .

Wherein, the barbs 3 are hinged on the outer wall of the abdominal catheter 1;

Preferably, both the abdominal catheter 1 and the barbs 3 on it are made of high biocompatible silicone.

Wherein, there is a specific angle between the barb 3 and the abdominal catheter 1,

Preferably, the specific angle is 10°˜20°.

Wherein, the barbs 3 are in a quasi-cylindrical shape, and their diameters gradually increase from top to bottom.

Wherein, a soft covering 4 is also sleeved on the outer wall of the middle part of the abdominal catheter 1 , and the soft covering 4 covers the barbs 3 and the outside of the abdominal catheter 1 .

Wherein, the soft covering film 4 can be tightened or loosened, and the soft covering film 4 deforms less when it is tightened, so that the barb is separated from the human tissue; the soft covering film 4 deforms less when it is relaxed. Large, allowing human tissue to be pressed into the space between the barbs;

Preferably, the soft covering film 4 is in direct contact with human tissue and is made of a highly biocompatible material.

Wherein, one end of the soft covering 4 is fixed on the outer wall of the abdominal catheter 1,

A fixing ring 5 is arranged at the other end of the soft film 4,

A rotating ring 6 rotatable relative to the fixed ring 5 is arranged inside the fixing ring 5, and an inner thread is arranged on the inner wall of the rotating ring 6; the rotating ring 6 is sleeved on the outside of the abdominal catheter 1;

External threads matching the internal threads are provided on the outer wall of the abdominal catheter 1 .

Among them, a spring assembly is arranged at the root of the barbs 3, and the spring assembly makes the barbs 3 all incline to the same side,

On the outer wall of the abdominal catheter 1, a slider 7 is provided below each barb 3, and the slider can slide back and forth along the axis direction of the abdominal catheter 1,

The top of the slider 7 is wedge-shaped and abuts the side of the barb 3;

Preferably, when the slider 7 slides toward the direction of the barb root, the slider 7 pushes the barb 3 to swing, thereby expanding the angle between the barb 3 and the abdominal catheter 1;

When the slider 7 slides in the opposite direction, the barb 3 swings under the action of the spring assembly, thereby reducing the angle between the barb 3 and the abdominal catheter 1 .

Wherein, a plurality of the sliding blocks 7 are provided, and the plurality of sliding blocks 7 are connected by connecting rods 8, so that the sliding blocks 7 slide synchronously.

Wherein, a worm 9 is provided on the abdominal catheter 1, and a turbine matched with the worm 9 is provided at the bottom of the slider 7, and the slider 7 is controlled along the axis of the abdominal catheter 1 by rotating the worm 9 Reciprocating sliding in direction;

Preferably, a limiting block 10 is further provided on the outer wall of the abdominal catheter 1 .

The beneficial effects of the present invention include:

(1) The peritoneal dialysis catheter for preventing displacement provided by the present invention is provided with barbs, which can make the peritoneal catheter and human tissue contact more tightly and firmly, and the peritoneal catheter will not be displaced;

(2) The barbs of the displacement-preventing peritoneal dialysis catheter provided by the present invention are covered with a soft covering, and the soft covering is deformed by the extrusion of human tissue and the barbs, and will not affect the inversion. The spines play a fixing role, and when the peritoneal dialysis catheter needs to be taken out, the barbs can be separated from the human tissue by tightening the soft covering, which reduces the pain of the patient and shortens the wound healing time.

Description of drawings

1 shows a schematic diagram of the overall structure of a peritoneal dialysis catheter for preventing displacement according to a preferred embodiment of the present invention;

2 shows a cross-sectional view at the fixed ring and the rotating ring of the peritoneal dialysis catheter for preventing displacement according to a preferred embodiment of the present invention, that is, the cross-sectional view at A-A in FIG. 1;

3 shows a cross-sectional view at the slider of the peritoneal dialysis catheter preventing displacement according to a preferred embodiment of the present invention, that is, the cross-sectional view at B-B in FIG. 1;

4 shows a partial enlarged view of a peritoneal dialysis catheter preventing displacement according to a preferred embodiment of the present invention.

Description of reference numbers:

1- Abdominal catheter

2- Bifurcated connecting pipe

3 - Barbs

4-soft film

5-Fixing ring

6- Turn the ring

7-Slider

8-Link

9-worm

10-Limit block

Detailed ways

The present invention will be further described in detail below through the accompanying drawings and embodiments. The features and advantages of the present invention will become more apparent from these descriptions.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

According to the peritoneal dialysis catheter for preventing displacement provided by the present invention, as shown in FIG. 1 and FIG. 2 , the peritoneal dialysis catheter includes a peritoneal catheter 1 and a bifurcated connecting pipe 2; one end of the peritoneal catheter 1 is inserted into the abdominal cavity of a patient, The other end is exposed outside the body, and the middle area of the abdominal catheter 1 passes through the abdominal tissue of the patient and is fixed; one end of the bifurcated connecting pipe 2 is connected with the abdominal catheter 1, and the other end is bifurcated and divided into two pipelines, which are respectively connected with the liquid inlet pipe and the peritoneal cavity catheter 1. The outlet pipe is connected.

Barbs 3 are provided on the outer wall of the middle portion of the abdominal catheter 1 , that is, the barbs 3 are provided in the area where the abdominal catheter 1 is in contact with the patient's abdominal tissue.

Preferably, the barbs 3 are hinged on the outer wall of the abdominal catheter 1, that is, the barbs 3 and the abdominal catheter 1 are connected by a rotatable pin, and further preferably, the abdominal catheter 1 and the barbs on it are connected 3 are all made of high biocompatible silicone; the bifurcated connecting tube is made of high strength PVC plastic.

In a preferred embodiment, the barb 3 and the abdominal catheter 1 form a specific angle, preferably, the specific angle is 10°˜20°. Further, when the abdominal catheter 1 is fixed in the human body, the angle is preferably 15°-20°, and when the abdominal catheter 1 needs to be taken out from the human body, the angle is preferably 10°-13°.

Preferably, the barbs 3 are inclined toward the abdominal cavity; the inclination directions of the plurality of barbs are the same;

Preferably, the barbs 3 are in a quasi-cylindrical shape, and the diameter of the barbs 3 gradually increases from top to bottom. The diameter is 4-5 mm, the end refers to the end farthest from the abdominal catheter 1 , and the root refers to the end that is immediately adjacent to the abdominal catheter 1 .

Preferably, the length of each barb is the same, which is 8-10 mm.

Further, the barbs are evenly arranged in a certain area outside the abdominal catheter 1, along the circumferential direction of the abdominal catheter 1, there are 8-12 barbs per week, along the radial direction of the abdominal catheter 1. , and each row is provided with 4-5 barbs. The distance between two adjacent barbs is 3 to 5 mm.

In a preferred embodiment, a soft covering 4 is further provided on the outer wall of the middle of the abdominal catheter 1 , and the soft covering 4 covers the barbs 3 and the outside of the abdominal catheter 1 .

The soft covering film 4 can be tightened or loosened, and the soft covering film 4 deforms less when it is tightened, so that the barb is separated from the human tissue; the soft covering film 4 deforms greatly when it is loosened, Allows human tissue to be pressed into the space between the barbs;

Preferably, the soft covering film 4 is in direct contact with human tissue and is made of a highly biocompatible material.

Specifically, as shown in FIGS. 1 and 2 , one end of the soft covering 4 is fixed on the outer wall of the abdominal catheter 1 ; preferably, one end of the soft covering 4 close to the abdominal cavity is fixed on the outer wall of the abdominal catheter 1 superior;

A fixing ring 5 is provided at the other end of the soft covering film 4, and the fixing ring 5 surrounds the outside of the abdominal catheter 1;

A rotating ring 6 rotatable relative to the fixed ring 5 is arranged inside the fixing ring 5, and an inner thread is arranged on the inner wall of the rotating ring 6; the rotating ring 6 is sleeved on the outside of the abdominal catheter 1;

An external thread matching the internal thread is provided on the outer wall of the abdominal catheter 1. By rotating the rotating ring 6, under the interaction between the internal thread and the external thread, the rotating ring 6 can drive the fixed ring 5 along the It moves back and forth in the axial direction of the peritoneal catheter 1 , thereby tightening the soft covering 4 or loosening the soft covering 4 .

In a preferred embodiment, as shown in FIG. 1 , FIG. 3 and FIG. 4 , a spring assembly is provided at the root of the barbs 3 , and the spring assembly makes the barbs 3 all incline to the same side, and the spring assembly can It can be a torsion spring or a tension spring;

On the outer wall of the abdominal catheter 1, a slider 7 is provided below each barb 3, and the slider can slide back and forth along the axis direction of the abdominal catheter 1,

Preferably, a concave slideway is provided at the bottom of the slideway, and a convex slideway is provided on the outer wall of the abdominal catheter 1. The slideway and the slideway cooperate with each other, so that the slider can only slide along the slideway. The extension direction of the rail slides, that is, the slider can only slide along the axis of the abdominal catheter 1;

The top of the slider 7 is wedge-shaped, and the top of the slider 7 is in contact with the side of the barb 3; during the reciprocating sliding of the slider 7, the slider 7 is in close contact with the barb 3;

Preferably, when the slider 7 slides toward the direction of the barb root, the slider 7 pushes the barb 3 to swing, thereby expanding the angle between the barb 3 and the abdominal catheter 1, so that the barb 3 is oriented toward the peritoneal catheter 1. external expansion, the abdominal catheter 1 is firmly fixed in the human body;

When the slider 7 slides in the opposite direction, the barbs 3 swing under the action of the spring assembly, thereby reducing the angle between the barbs 3 and the abdominal catheter 1, so that the barbs are retracted inward, and the abdominal catheter 1 can be easily removed from the human body.

In a preferred embodiment, there are multiple sliders 7, and the multiple sliders 7 are connected by connecting rods 8, so that the multiple sliders 7 slide synchronously. The arc-shaped rods connecting the sliding blocks also include straight rods connecting the sliding blocks in the axial direction.

Preferably, a worm 9 is provided on the abdominal catheter 1 , and a turbine matched with the worm 9 is provided at the bottom of the slider 7 , and the slider 7 is controlled along the abdominal catheter 1 by rotating the worm 9 . The axis direction reciprocates sliding; the worm can be provided with only one, the turbine can be provided with multiple, under the action of the connecting rod 8, multiple sliders can realize synchronous sliding, more preferably, the worm 9 is provided with two, so that The system composed of multiple sliders and connecting rods has a balanced force during sliding, and the sliding is smooth.

Preferably, a limiting block 10 is also provided on the outer wall of the abdominal catheter 1, and further, a limiting block 10 is respectively provided at the front and rear ends of each sliding block 7, so as to ensure that the sliding block 10 can be protected under any circumstances. The sliding position of the device will not exceed the warning range, so as to prevent the inclination angle of the barb from changing drastically, causing injury to the patient or causing the abdominal catheter 1 to fall off.

In a preferred embodiment, the peritoneal catheter 1 is also optionally provided with a Dacron sheath to further fix the peritoneal catheter 1 and prevent the invasion of germs.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front" and "rear" are based on the working state of the present invention. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention .

The present invention has been described above with reference to the preferred embodiments, but these embodiments are only exemplary and serve only for illustrative purposes. On this basis, various substitutions and improvements can be made to the present invention, which all fall within the protection scope of the present invention.

Claims (10)

1. A peritoneal dialysis catheter for preventing displacement, characterized in that it comprises a peritoneal catheter (1) and a bifurcated connecting tube (2);

an agnail (3) is arranged on the outer wall of the middle part of the abdominal cavity catheter (1);

the root of the barb (3) is provided with a spring assembly which leads the barb (3) to incline towards the same side,

a slide block (7) is arranged on the outer wall of the abdominal cavity catheter (1) below each barb (3), the slide block can slide back and forth along the axial direction of the abdominal cavity catheter (1),

the top of the sliding block (7) is wedge-shaped and is abutted against the side part of the barb (3).

2. The peritoneal dialysis catheter of claim 1,

the barb (3) is hinged on the outer wall of the abdominal cavity catheter (1);

the abdominal cavity catheter (1) and the barbs (3) thereon are made of high-biocompatibility silica gel.

3. The peritoneal dialysis catheter of claim 1,

the barb (3) and the abdominal cavity catheter (1) form a specific angle,

the specific angle is 10-20 degrees.

4. The peritoneal dialysis catheter of claim 1,

barb (3) are the similar cylindric, from last to down, its diameter size grow gradually.

5. The peritoneal dialysis catheter of claim 1,

still the cover is equipped with soft tectorial membrane (4) on the outer wall at abdominal cavity pipe (1) middle part, soft tectorial membrane (4) cladding is in the outside of barb (3) and abdominal cavity pipe (1).

6. Displacement prevention peritoneal dialysis catheter of claim 5,

the soft covering film (4) can be tightened or loosened, and the soft covering film (4) has small deformation during tightening so that the barbs are separated from human tissues; the soft coating (4) deforms greatly when being relaxed, and allows human tissues to be pressed into gaps among the barbs;

the soft coating (4) is directly contacted with human tissues and is made of high-biocompatibility materials.

7. Displacement prevention peritoneal dialysis catheter of claim 6,

one end of the soft covering film (4) is fixed on the outer wall of the abdominal cavity catheter (1),

a fixing ring (5) is arranged at the other end of the soft coating film (4),

a rotating ring (6) which can rotate relative to the fixed ring (5) is arranged in the fixed ring (5), and an internal thread is arranged on the inner wall of the rotating ring (6); the rotating ring (6) is sleeved outside the abdominal cavity catheter (1);

and the outer wall of the abdominal cavity catheter (1) is provided with an external thread matched with the internal thread.

8. The peritoneal dialysis catheter of claim 1,

when the sliding block (7) slides towards the direction of the barb root, the sliding block (7) pushes the barb (3) to swing, so that the included angle between the barb (3) and the abdominal catheter (1) is enlarged;

when the sliding block (7) slides towards the opposite direction, the barb (3) swings under the action of the spring assembly, so that the included angle between the barb (3) and the abdominal cavity catheter (1) is reduced.

9. The peritoneal dialysis catheter of claim 8,

the plurality of sliding blocks (7) are arranged and connected through the connecting rod (8) between the plurality of sliding blocks (7), so that the plurality of sliding blocks (7) can slide synchronously.

10. The peritoneal dialysis catheter of claim 8,

a worm (9) is arranged on the abdominal cavity catheter (1), a turbine matched with the worm (9) is arranged at the bottom of the sliding block (7), and the sliding block (7) is controlled to slide back and forth along the axial direction of the abdominal cavity catheter (1) by rotating the worm (9);

the outer wall of the abdominal cavity catheter (1) is also provided with a limiting block (10).

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