Peritoneal dialysis catheter
By presetting high-density counterweights at the insertion end of the peritoneal dialysis catheter, the insertion end of the catheter is maintained at the bottom of the abdominal cavity, the problem of catheter displacement is solved, and the stable reset of the catheter and the effective operation of peritoneal dialysis are achieved.
Patent Information
- Application Number
- CN202420924590.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The peritoneal dialysis catheter is prone to displacement after being placed in the abdominal cavity, resulting in reduced ultrafiltration and catheter blockage, which in turn affects the dialysis effect.
The counterweight is preset at the insertion end of the peritoneal dialysis catheter. The counterweight is denser and tends to be located at a lower position, so that the catheter insertion end is maintained at the bottom of the abdominal cavity, reducing the possibility of displacement. When the catheter is displaced, the weight member is moved toward the base of the abdominal cavity by simple movement, thereby realizing the reset of the catheter.
It effectively reduces the possibility of dislocation of the catheter in the abdominal cavity, simplifies the catheter reset process, improves the stability and effectiveness of peritoneal dialysis, and reduces the possibility that patients need to use secondary catheter.
Smart Images
Figure CN222623433U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a peritoneal dialysis catheter. Background Art
[0002] Peritoneal dialysis uses the peritoneum as a semi-permeable membrane and gravity to infuse the prepared dialysate into the patient's peritoneal cavity through a catheter. In this way, there is a concentration gradient difference of solutes on both sides of the peritoneum, and the solutes on the high-concentration side move to the low-concentration side (diffusion effect); water moves from the hypotonic side to the hypertonic side (osmotic effect). The peritoneal dialysate is continuously replaced to achieve the purpose of removing metabolic products and toxic substances in the body and correcting water and electrolyte imbalance.
[0003] Establishing a patency of peritoneal dialysis access is the first condition for peritoneal dialysis and is also a key step. In clinical practice, surgery is usually used to place the end of the peritoneal dialysis catheter at the lowest point of the abdominal cavity - the vesicorectal pouch or the uterorectal pouch. Improper catheterization during early surgery, insufficient defecation, constipation, excessive tension at a certain point during the operation, squeezing the bag, and applying pressure through the ascites tube may cause the part of the catheter in the abdominal cavity to flip over and the end to shift.
[0004] Displacement of the distal end of the peritoneal dialysis catheter can cause reduced ultrafiltration and blockage of the peritoneal dialysis catheter, leading to dialysis failure. Once the catheter is displaced, some methods are used to reposition it, such as exercise repositioning, including tiptoeing, squatting, high jumping, climbing stairs, etc.; manual repositioning, repositioning the catheter through massage; guidewire-guided repositioning of the catheter; laparoscopic repositioning. However, these methods are difficult to reposition the catheter smoothly. When various methods fail to reposition the displaced catheter, it is necessary to choose to re-place the catheter on the same or opposite side of the abdomen. Utility Model Content
[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a peritoneal dialysis catheter, which has a reduced possibility of displacement after being placed in the abdominal cavity and is easier to reposition.
[0006] According to the peritoneal dialysis catheter of the embodiment of the utility model, the insertion end of the peritoneal dialysis catheter is used to be placed in the abdominal cavity, and a counterweight is preset at the end of the insertion end of the peritoneal dialysis catheter, and the counterweight is used to make the insertion end of the peritoneal dialysis catheter be located at the bottom of the abdominal cavity.
[0007] According to the peritoneal dialysis catheter of the embodiment of the utility model, by presetting a counterweight at the insertion end of the peritoneal dialysis catheter, the counterweight has a larger density and a heavier weight, and tends to be located at a lower position. Therefore, by arranging the counterweight at the insertion end, the insertion end can be tended to be located at a lower position. After being placed in the abdominal cavity, the insertion end can be kept at the bottom of the abdominal cavity and is not easily displaced. When the insertion end is displaced, it can also be reset and moved to the lowest point of the abdominal cavity by simple movements. Therefore, the present application is conducive to ensuring the use effect of the peritoneal dialysis catheter, reducing the possibility of patients needing a second catheterization, and is easy to use.
[0008] According to some embodiments of the present invention, the weight piece is embedded in the tube wall of the insertion end of the peritoneal dialysis catheter.
[0009] According to some embodiments of the present invention, the tube wall of the insertion end of the peritoneal dialysis catheter covers the counterweight.
[0010] According to some embodiments of the present invention, the weight member extends circumferentially along the peritoneal dialysis catheter.
[0011] According to some embodiments of the present invention, the insertion end of the peritoneal dialysis catheter is open, and the counterweight is spaced apart from the insertion end of the peritoneal dialysis catheter by a set distance.
[0012] According to some embodiments of the present invention, the side wall of the insertion end of the peritoneal dialysis catheter is provided with an opening area, the opening area is provided with a plurality of through holes, and the counterweight is provided in the opening area or adjacent to the opening area.
[0013] According to some embodiments of the present invention, the counterweight is staggered with the through hole.
[0014] According to some embodiments of the present invention, the counterweight is made of stainless steel or ceramic.
[0015] According to some embodiments of the present invention, the peritoneal dialysis catheter is provided with a fixing portion, and the fixing portion is used to fix the peritoneal dialysis catheter to the abdominal wall.
[0016] According to some embodiments of the present invention, the fixing portion is a polyester sleeve.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0019] Figure 1 This is a schematic structural diagram of a peritoneal dialysis catheter according to an embodiment of the utility model;
[0020] Figure 2 This is a cross-sectional view of a peritoneal dialysis catheter provided with a weight component according to an embodiment of the utility model.
[0021] Reference numerals:
[0022] Peritoneal dialysis catheter 100; insertion end 10; weight 20; first portion 11;
[0023] The second portion 12 ; the open area 30 ; the through hole 301 ; and the polyester sleeve 40 . DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] The term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.
[0028] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.
[0029] The term "plurality" used in the present invention refers to more than two (including two).
[0030] Combine the following Figure 1 to Figure 2 The peritoneal dialysis catheter 100 of the present invention is described below.
[0031] like Figure 1 to Figure 2 As shown, according to the peritoneal dialysis catheter 100 of the embodiment of the present invention, the insertion end 10 of the peritoneal dialysis catheter 100 is used to be placed in the abdominal cavity, and a counterweight 20 is preset at the end of the insertion end 10 of the peritoneal dialysis catheter 100, and the counterweight 20 is used to make the insertion end 10 of the peritoneal dialysis catheter 100 located at the bottom of the abdominal cavity.
[0032] Specifically, one of the two ends of the peritoneal dialysis catheter 100 is the insertion end 10, and the configured dialysate can be injected into the peritoneal cavity through the peritoneal dialysis catheter 100 through the insertion end 10, and the peritoneal dialysis fluid can also enter the peritoneal dialysis catheter 100 through the insertion end 10 and finally be discharged out of the peritoneal cavity.
[0033] The peritoneal dialysis catheter 100 needs to be partially inserted into the human body, so the material of the peritoneal dialysis catheter 100 is usually a polymer material with good human biocompatibility, blood compatibility and tissue compatibility. For example, the peritoneal dialysis catheter 100 can be made of silicone.
[0034] The insertion end 10 of the peritoneal dialysis catheter 100 is preset with a counterweight 20. The counterweight 20 is made of a material with a relatively high density. Under the action of gravity, the counterweight 20 tends to move to a lower position, so that the insertion end 10 of the peritoneal dialysis catheter 100 can tend to move to the bottom of the abdominal cavity and remain at the bottom of the abdominal cavity; when the insertion end 10 is displaced, since the counterweight 20 itself tends to move downward, the user can move the counterweight 20 toward the bottom of the abdominal cavity through simple movement, so that the insertion end 10 can be smoothly reset.
[0035] The counterweight 20 is preset at the end of the insertion end 10 of the peritoneal dialysis catheter 100. After the insertion end 10 is placed in the abdominal cavity, the counterweight 20 can guide the insertion end 10 to move to the bottom of the abdominal cavity, which is more convenient to use. Specifically, the material of the counterweight 20 can be ceramic or stainless steel. The counterweight 20 can be set close to the insertion end 10 or be spaced a certain distance from the insertion end 10.
[0036] According to the peritoneal dialysis catheter 100 of the embodiment of the utility model, by presetting the counterweight 20 at the insertion end 10 of the peritoneal dialysis catheter 100, the counterweight 20 has a larger density and a heavier weight, and tends to be located at a lower position. Therefore, by arranging the counterweight 20 at the insertion end 10, the insertion end 10 can be made to tend to be located at a lower position. After being placed in the abdominal cavity, the insertion end 10 can be kept at the bottom of the abdominal cavity and is not easily displaced. When the insertion end 10 is displaced, the insertion end 10 can also be reset and moved to the lowest point of the abdominal cavity by simple movements. Therefore, the present application is conducive to ensuring the use effect of the peritoneal dialysis catheter 100, reducing the possibility of patients needing a second catheterization, and is easy to use.
[0037] According to some embodiments of the utility model, the counterweight 20 is embedded in the tube wall at the end of the insertion end 10 of the peritoneal dialysis catheter 100. In this way, the connection area between the counterweight 20 and the peritoneal dialysis catheter 100 is large, and the counterweight 20 is not easy to be separated from the peritoneal dialysis catheter 100. The counterweight 20 can be embedded in the peritoneal dialysis catheter 100 when the peritoneal dialysis catheter 100 is formed to achieve the connection between the peritoneal dialysis catheter 100 and the counterweight 20; or, the counterweight 20 is adhesively connected to the peritoneal dialysis catheter 100. The surface of the counterweight 20 can be partially exposed outside the peritoneal dialysis catheter 100, or the peritoneal dialysis catheter 100 can also completely cover the counterweight 20.
[0038] According to some embodiments of the present invention, Figure 2 As shown, the wall of the end of the insertion end 10 of the peritoneal dialysis catheter 100 covers the weight piece 20. In this way, the weight piece 20 will not contact the human tissue or the peritoneal dialysis fluid, and only the peritoneal dialysis catheter 100 will contact the human tissue and the peritoneal dialysis fluid. The peritoneal dialysis catheter 100 of the present application has good tissue compatibility and good abdominal cavity tolerance, and the weight piece 20 can be made of a material with poor compatibility with human tissue.
[0039] For example, Figure 1 and Figure 2 As shown, the portion of the peritoneal dialysis catheter 100 provided with the weight piece 20 includes a first portion 11 located radially outward and a second portion 12 located radially inward, and the weight piece 20 is wrapped between the first portion 11 and the second portion 12 .
[0040] According to some embodiments of the present invention, Figure 2As shown, the weight piece 20 extends along the circumference of the peritoneal dialysis catheter 100, that is, the weight piece 20 is annular. Compared with the weight piece 20 only provided on a portion of the circumferential wall at the same axial position, the weight piece 20 extends along the circumference of the peritoneal dialysis catheter 100, so that the insertion end 10 of the peritoneal dialysis catheter 100 is not easy to tilt, the peritoneal dialysis catheter 100 is not easy to bend, the position of the insertion end 10 of the peritoneal dialysis catheter 100 is relatively fixed, and the stability of the use effect is better; at the same time, since the weight piece 20 is hollow in structure, it does not affect the drainage of the peritoneal dialysis fluid by the peritoneal dialysis catheter 100.
[0041] In some embodiments, a plurality of counterweights 20 may be provided, and the plurality of counterweights 20 may be spaced apart along the circumference of the peritoneal dialysis catheter 100. Similarly, the insertion end 10 of the peritoneal dialysis catheter 100 is not prone to tilt, the peritoneal dialysis catheter 100 is not prone to bend, the position of the insertion end 10 of the peritoneal dialysis catheter 100 is relatively fixed, and the stability of the use effect is better.
[0042] According to some embodiments of the utility model, the insertion end 10 of the peritoneal dialysis catheter 100 is open, and the counterweight 20 is spaced apart from the insertion end 10 of the peritoneal dialysis catheter 100 by a set distance. It should be noted that before inserting the peritoneal dialysis catheter 100 into the abdominal cavity, it is necessary to connect a guide member at the opening of the insertion end 10 to facilitate inserting the peritoneal dialysis catheter 100 into the abdominal cavity. The counterweight 20 is spaced apart from the insertion end 10 of the peritoneal dialysis catheter 100 by a set distance, so that the counterweight 20 does not interfere with the installation of the guide member. The specific value of the set distance is determined according to the size of the guide member and the size of the peritoneal dialysis catheter 100, and is not specifically limited here.
[0043] According to some embodiments of the present invention, Figure 1 As shown, the side wall of the end of the insertion end 10 of the peritoneal dialysis catheter 100 is provided with an opening area 30, and a plurality of through holes 301 are provided in the opening area 30, and the weight piece 20 is provided in the opening area 30. It should be noted that the dialysate can flow into the peritoneal cavity through the through holes 301, and the peritoneal dialysis fluid can enter the peritoneal dialysis catheter 100 through the through holes 301. By providing a plurality of through holes 301, the flow area of the liquid is larger, and even if some through holes 301 are blocked, the remaining through holes 301 can still be used normally, which is conducive to ensuring the long-term and stable use effect of the peritoneal dialysis catheter 100. The counterweight 20 can be arranged in the opening area 30. Specifically, the counterweight 20 may block part of the through hole 301. Alternatively, the counterweight 20 is staggered from the through hole 301 and is arranged in the opening area 30, that is, the counterweight 20 is arranged close to the insertion end 10. In this way, the counterweight 20 has a better guiding effect on the insertion end 10, which is conducive to keeping the insertion end 10 at the lowest position in the abdominal cavity.
[0044] In other embodiments, the weight member 20 may also be disposed adjacent to the opening area 30, for example, the weight member 20 may be partially disposed in the opening area 30 and partially disposed on the side of the opening area 30 away from the insertion end 10; or the weight member 20 may be completely disposed on the side of the opening area 30 away from the insertion end 10, in which case the weight member 20 is farther from the insertion end 10. In this way, there is no need to consider the problem that the arrangement of the weight member 20 affects the use effect of the opening area 30, and the processing difficulty is lower.
[0045] In the embodiment where the weight 20 is disposed in the opening area 30, the weight 20 is staggered with the through hole 301. For example, a clearance hole is provided at the position of the weight 20 corresponding to the through hole 301 so that the weight 20 is staggered with the through hole 301 (e.g., Figure 1 and Figure 2 Alternatively, there are multiple weight pieces 20, each of which is disposed between two adjacent through holes 301 in the opening area 30, so that the weight piece 20 is staggered with the through holes 301. In this way, the original liquid flow area of the peritoneal dialysis catheter 100 can be retained, avoiding affecting the use of the through holes 301.
[0046] In some embodiments, the weight piece 20 is made of stainless steel or ceramic. Using stainless steel or ceramic as the weight piece 20 has, on the one hand, a lower cost; on the other hand, even if the peritoneal dialysis catheter 100 is cracked or damaged, causing the peritoneal dialysis fluid to contact the weight piece 20, the weight piece 20 is not likely to react with the peritoneal dialysis fluid, thereby reducing the possibility of accidents.
[0047] According to some embodiments of the present invention, Figure 1 As shown, the peritoneal dialysis catheter 100 is provided with a fixing part, which is used to fix the peritoneal dialysis catheter 100 to the abdominal wall to reduce the possibility of the peritoneal dialysis catheter 100 coming out. For example, the fixing part can be a polyester sleeve 40, and two polyester sleeves 40 are provided. The two polyester sleeves 40 are respectively placed in the rectus abdominis and under the skin during surgery. After a period of time, the polyester sleeves 40 will grow together with the surrounding tissues, so that, on the one hand, the peritoneal dialysis catheter 100 is fixed, and on the other hand, microorganisms can be prevented from entering the abdominal cavity.
[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A peritoneal dialysis catheter, characterized in that: The insertion end (10) of the peritoneal dialysis catheter (100) is used to be placed in the abdominal cavity. A counterweight (20) is preset at the end of the insertion end (10) of the peritoneal dialysis catheter (100). The counterweight (20) is used to make the insertion end (10) of the peritoneal dialysis catheter (100) located at the bottom of the abdominal cavity.
2. The peritoneal dialysis catheter according to claim 1, characterized in that: The counterweight (20) is embedded in the tube wall at the end of the insertion end (10) of the peritoneal dialysis catheter (100).
3. The peritoneal dialysis catheter according to claim 2, characterized in that: The tube wall at the end of the insertion end (10) of the peritoneal dialysis catheter (100) covers the counterweight (20).
4. The peritoneal dialysis catheter according to claim 1, characterized in that: The weight member (20) extends along the circumference of the peritoneal dialysis catheter (100).
5. The peritoneal dialysis catheter according to claim 1, characterized in that: The insertion end (10) of the peritoneal dialysis catheter (100) is open, and the weight (20) is spaced apart from the insertion end (10) of the peritoneal dialysis catheter (100) by a set distance.
6. The peritoneal dialysis catheter according to claim 1, characterized in that: The side wall of the insertion end (10) of the peritoneal dialysis catheter (100) is provided with an opening area (30), and a plurality of through holes (301) are provided in the opening area (30). The counterweight (20) is arranged in the opening area (30) or adjacent to the opening area (30).
7. The peritoneal dialysis catheter according to claim 6, characterized in that: The counterweight (20) and the through hole (301) are staggered.
8. The peritoneal dialysis catheter according to claim 1, characterized in that: The counterweight (20) is made of stainless steel or ceramic.
9. The peritoneal dialysis catheter according to claim 1, characterized in that: The peritoneal dialysis catheter (100) is provided with a fixing portion, and the fixing portion is used to fix the peritoneal dialysis catheter (100) to the abdominal wall.
10. The peritoneal dialysis catheter according to claim 9, characterized in that The fixing part is a polyester sleeve (40).