Absorbable self-positioning peritoneal dialysis catheter

Abstract

The absorbable self-positioning peritoneal dialysis catheter comprises a catheter body, the tail end of the intra-abdominal section of the catheter body is a closed ball head protruding outwards, the side face of the closed ball head is provided with an open hole communicated with an inner cavity of the catheter body, and the inner side of the closed ball head is filled with polymer gelatin sponge filler. According to the design, the tumbler mechanics principle is adopted, the self weight of the closed ball head can be increased after the polymer gelatin sponge filler absorbs water, and therefore self-positioning can be achieved under the action of gravity; the polymer gelatin sponge filler is arranged in the closed ball head and is not in contact with an adjacent organ, so that the exposure risk can be obviously reduced, and the falling risk is avoided; the polymer gelatin sponge is an absorbable material and can be completely absorbed within about 3 months, so that the risk of long-term retention of foreign matters is avoided; the tail end of the intra-abdominal section is provided with a closed ball head protruding outwards, and the closed ball head is closed and round, so that the guide wire does not exceed the tail end, and abdominal visceral organs can be prevented from being damaged in the implantation process.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an absorbable self-positioning peritoneal dialysis catheter. Background Art

[0002] Peritoneal dialysis catheters are an important medical device used for peritoneal dialysis treatment. Peritoneal dialysis is an effective renal replacement therapy for end-stage renal disease, and peritoneal dialysis catheters are the "lifeline" of peritoneal dialysis patients. Peritoneal dialysis catheters may be displaced after being placed in the abdominal cavity, which usually occurs within 1 month after catheterization. The main reason is that the abdominal wall tissue where the catheter is placed heals slowly, resulting in poor local fixation. In addition, symptoms such as constipation, diarrhea, squatting, and severe coughing may cause a sharp change in abdominal pressure, inducing catheter displacement. Currently, peritoneal dialysis catheters used in clinical practice have some inherent defects: (1) The intra-abdominal section is relatively light and will float when placed in the abdominal cavity and soaked in peritoneal dialysis fluid; (2) The end opening is relatively large, and the impact of the fluid may cause reverse displacement.

[0003] In response to the above problems, existing literature reports on self-positioning peritoneal dialysis catheters, which use a 12-gram tungsten tube embedded in the end of the intra-abdominal section of the peritoneal dialysis catheter (the tungsten tube is on the outer surface of the catheter). Its disadvantages are: (1) The embedded part will corrode and loosen if it is left in the abdominal cavity for a long time and soaked in peritoneal dialysis fluid; (2) When peritoneal dialysis fluid is infused, the impact force of the fluid on the embedded part will cause loosening for a long time; (3) The weight of the tungsten tube itself in the standing position will cause loosening; (4) The foreign body in the tungsten tube will stimulate the migration and wrapping of the omentum, and fibrin will adhere; (5) The contact of the tungsten tube with foreign bodies will irritate the rectum, bladder, and uterus; (6) There is a risk of release of tungsten metal that is retained in the abdominal cavity for a long time.

[0004] In addition, an existing patent (Anti-wrap Peritoneal Dialysis Catheter, Application No.: 2020223938012) discloses an anti-wrap peritoneal dialysis catheter, comprising a catheter and two collars located on the outer wall of the middle portion of the catheter, including a cross-shaped drainage tube at the end of the catheter, and a side hole on the catheter connected to the cross-shaped drainage tube. Its disadvantages are: (1) the intra-abdominal section of the catheter is still relatively light, and the problem of tube drift still exists; (2) the cross is at the end of the catheter, and the omentum may still be adsorbed. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses an absorbable self-positioning peritoneal dialysis catheter.

[0006] The specific plan is as follows:

[0007] An absorbable self-positioning peritoneal dialysis catheter is characterized in that it includes a catheter body, the end of the intra-abdominal section of the catheter body is a closed ball head protruding outward, the side of the closed ball head is provided with an opening connected to the inner cavity of the catheter body, and the inside is filled with a polymer gelatin sponge filler.

[0008] As a further improvement of the present invention, a side hole for assisting drainage is provided on the side of the intra-abdominal section of the catheter body.

[0009] As a further improvement of the present invention, the closed ball head is used to prevent the guide wire from exceeding the end of the intra-abdominal section of the catheter body. It is made of the same material as the catheter body and has a smooth hemispherical outer surface.

[0010] As a further improvement of the present invention, the catheter body is outer-coated with two polyester sleeves.

[0011] The beneficial effects of the present invention are:

[0012] (1) The design adopts the principle of tumbler mechanics. The polymer gelatin sponge filler will increase the deadweight of the closed ball head after absorbing water, so that it can achieve self-positioning under the action of gravity;

[0013] (2) The polymer gelatin sponge filler is inside the closed ball head and does not come into contact with adjacent organs, which can significantly reduce the risk of exposure and does not cause the risk of falling off;

[0014] (3) Polymer gelatin sponge is an absorbable material that can be completely absorbed in about 3 months, avoiding the risk of long-term retention of foreign matter;

[0015] (4) The end of the intra-abdominal segment adopts a closed ball head that protrudes outward. It is closed and rounded, so that the guide wire will not extend beyond the end, thus avoiding damage to abdominal organs during insertion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the present invention.

[0017] Figure 2 for Figure 1 Schematic diagram of the internal structure of the closed ball head.

[0018] List of reference numerals:

[0019] 1-catheter body, 2-closed ball head, 3-opening, 4-polymer gelatin sponge filler. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] As shown in the figure, the present invention provides an absorbable self-positioning peritoneal dialysis catheter, including a catheter body 1, the end of the intra-abdominal section of the catheter body 1 is a closed ball head 2 protruding outward, the side of the closed ball head 2 is provided with an opening 3 connected to the inner cavity of the catheter body 1, and the inside is filled with a polymer gelatin sponge 4. After absorbing water, the polymer gelatin sponge will increase the dead weight of the closed ball head. Combined with the mechanics principle of the tumbler, the end of the intra-abdominal section of the catheter body 1 can achieve self-positioning under the action of gravity. In addition, the polymer gelatin sponge is in the closed ball head and does not contact the adjacent organs, which can significantly reduce the risk of exposure and there is no risk of falling off; the polymer gelatin sponge is an absorbable material and can be completely absorbed in about 3 months, avoiding the risk of long-term retention of foreign matter.

[0022] In this embodiment, a side hole for facilitating drainage is provided on the side of the intra-abdominal section of the catheter body 1 .

[0023] In this embodiment, the closed ball head 2 is used to prevent the guidewire from extending beyond the intra-abdominal end of the catheter body 1. Made of the same material as the catheter body 1, it has a smooth hemispherical outer surface. Its closed and rounded shape prevents the guidewire from extending beyond the distal end, thus preventing damage to abdominal organs during insertion.

[0024] In this embodiment, the catheter body 1 is covered with two polyester sleeves.

[0025] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An absorbable self-positioning peritoneal dialysis catheter, characterized in that: The catheter body (1) comprises a catheter body (1), wherein the end of the intra-abdominal section of the catheter body (1) is a closed ball head (2) protruding outward, and the side of the closed ball head (2) is provided with an opening (3) communicating with the inner cavity of the catheter body (1), and the inner side is filled with a polymer gelatin sponge filler (4).

2. The absorbable self-positioning peritoneal dialysis catheter according to claim 1, characterized in that: The side of the intra-abdominal section of the catheter body (1) is provided with a side hole for assisting drainage.

3. The absorbable self-positioning peritoneal dialysis catheter according to claim 1, characterized in that: The closed ball head (2) is used to prevent the guide wire from exceeding the end of the intra-abdominal section of the catheter body (1). It is made of the same material as the catheter body (1) and has a smooth hemispherical outer surface.

4. The absorbable self-positioning peritoneal dialysis catheter according to claim 1, characterized in that: The catheter body (1) is provided with two polyester sleeves.

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