Peritoneal dialysis external short tube
By designing a peritoneal dialysis external short tube with anti-slip ring and extrusion plate, combined with nylon and silicone materials, the problems of fluid leakage and contamination of traditional equipment are solved, achieving a safer and more durable peritoneal dialysis process.
Patent Information
- Application Number
- CN202323303409.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-05
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-05
AI Technical Summary
Traditional peritoneal dialysis external short tubes have fluid leakage and contamination problems in the joint design and material, resulting in an increased risk of infection and peritonitis in patients.
A peritoneal dialysis external short tube including a catheter, a knob switch and a sleeve is designed, using internal and external threaded joints, equipped with anti-slip rings and extrusion plates, the liquid flow is controlled through the knob switch, and wear-resistant nylon and Biocompatible silicone material, protective cap and cap shell provide protection and sterilization channels.
It effectively avoids leakage of peritoneal dialysate and contamination of pipelines, ensures the safety of patients, reduces the occurrence of infection and peritonitis, and improves the service life and sterilization effect of the equipment.
Smart Images
Figure CN222195611U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a peritoneal dialysis external short tube. Background Art
[0002] In the treatment of acute renal injury and chronic renal failure, peritoneal dialysis is one of the effective renal replacement therapies. It has the characteristics of simple operation, low medical cost and easy popularization. It plays an irreplaceable role in improving the treatment rate of uremia patients in my country. In general, conventional continuous ambulatory peritoneal dialysis exchanges the dialysate 3 to 5 times a day. In order to perform peritoneal dialysis, it is usually necessary to use a peritoneal dialysis external short tube to connect the peritoneal dialysis bag system with the peritoneal dialysis catheter extending into the patient's abdominal cavity, so as to control and guide the inflow of fresh dialysate from the peritoneal dialysis bag system to the patient's abdominal cavity and the outflow of waste fluid from the patient's abdominal cavity. The peritoneal dialysis external short tube designed and developed by this design is used in vitro for the connection of the peritoneal dialysis catheter and the peritoneal dialysis fluid pipeline to prevent or allow the flow of peritoneal dialysis fluid.
[0003] Traditional peritoneal dialysis external short tubes have certain drawbacks in terms of material and structural design. For example, unreasonable joint design may cause leakage in the connection with the peritoneal dialysis fluid end or the peritoneal dialysis patient end, and the pipeline may be contaminated. If the joint material is not durable, the product may fall off after repeated use, which may cause peritonitis in patients, etc. Utility Model Content
[0004] The utility model provides a peritoneal dialysis external short tube, the purpose of which is to avoid leakage in the connection of the peritoneal dialysis fluid end or the peritoneal dialysis patient end and contamination of the pipeline, thereby ensuring that the peritoneal dialysis patients can safely and effectively perform peritoneal dialysis treatment, reduce infection, and reduce the occurrence of peritonitis.
[0005] The utility model is realized through the following technical scheme: a peritoneal dialysis external short tube, comprising a catheter, a knob switch and a sleeve, wherein the knob switch and the sleeve are coaxially connected to the outside of the catheter, and rotating the knob switch can make one end of the sleeve squeeze the catheter to control the flow rate of the medicine solution, and the two ends of the catheter are respectively provided with an internal thread joint and an external thread joint, and the internal thread joint and the external thread joint both comprise a coaxially connected head and a rod, the rod of the internal thread joint is provided with a first anti-slip ring, and the rod of the external thread joint is provided with a second anti-slip ring, and the two ends of the catheter are respectively sleeved on the rod of the internal thread joint and the rod of the external thread joint, and the internal thread joint and the external thread joint are respectively covered with a protective cap and a cap shell.
[0006] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0007] In this solution, the internal thread joint and the external thread joint are sleeved on both ends of the catheter through the rod, and because the rods of the internal thread joint and the external thread joint are respectively connected with the first anti-slip ring and the second anti-slip ring, this can play an anti-slip role. After being assembled with the catheter, it can ensure that the catheter does not fall off.
[0008] The structure of this solution can avoid leakage and pipeline contamination in the later connection with the peritoneal dialysis fluid end or the peritoneal dialysis patient end, thereby ensuring that peritoneal dialysis patients can safely and effectively undergo peritoneal dialysis treatment, reduce infection, and reduce the occurrence of peritonitis.
[0009] Furthermore, the knob switch is threadedly connected to the sleeve, one end of the sleeve is threadedly connected to the external threaded joint, and the other end of the sleeve is connected to at least two extrusion plates, the extrusion plates can produce elastic deformation, the extrusion plates can extend into the knob switch, the catheter passes through the knob switch and the sleeve, and rotating the knob switch can move the end of the extrusion plate toward the catheter to squeeze the catheter to control the flow of the drug solution.
[0010] Beneficial effect: In this solution, by turning the knob switch, the extrusion plate at the end of the sleeve can be moved toward the catheter, thereby squeezing the catheter to deform, changing the size of the drug flow area of the catheter, thereby achieving the purpose of controlling the drug flow rate of the catheter.
[0011] Furthermore, the knob switch is coaxially provided with a channel for the passage of the catheter, and the inner side of the knob switch is coaxially provided with a limit cavity and an extrusion cavity communicated with the channel, the limit cavity has a limit end at one end facing the sleeve, and the other end of the limit cavity is communicated with the extrusion cavity, the extrusion cavity is flared, and the end of the extrusion cavity connected to the limit cavity is a large end, and the other end of the extrusion cavity is a small end, and a pressure block is connected to the end of the extrusion plate, and the end of the pressure block facing the sleeve is a clamping end, and the limit end can be abutted against the clamping end, and rotating the knob switch can make the side of the extrusion cavity gradually squeeze the pressure block toward the catheter direction so that the pressure block squeezes the catheter.
[0012] Beneficial effect: In this scheme, the limit cavity is used to limit the axial movement of the pressure block at the end of the extrusion plate, and the flared port of the extrusion cavity can use its inclined surface to cause the knob switch and the sleeve to produce axial displacement when the knob switch is turned, so that the end of the extrusion plate is squeezed by the inner side of the extrusion cavity and deformed inwardly, thereby squeezing the catheter and controlling the flow of the liquid medicine.
[0013] Furthermore, the pressing block is in the shape of a triangular prism.
[0014] Beneficial effect: Such a setting can make the pressing block and the inner side of the extrusion cavity match better, and the whole process is smoother when twisting the knob switch.
[0015] Furthermore, the ends of the pressing block and the limiting cavity that abut against each other are both inclined surfaces that match each other.
[0016] Beneficial effect: Such a setting can make the limiting relationship between the pressing block and the limiting cavity more stable, and it is not easy to slip. The inclined surfaces of the pressing block and the limiting cavity can have a better limiting effect on the pressing block, and the pressing block is not easy to shift by itself during use.
[0017] Furthermore, a plurality of anti-slip teeth are provided on the outer side of the knob switch, and the plurality of anti-slip teeth are distributed along the circumference of the knob switch.
[0018] Beneficial effect: The setting of the anti-slip teeth can prevent slipping when turning the knob switch.
[0019] Furthermore, the protective cap and the cap shell are both made of polyethylene, the internal threaded joint and the knob switch are both made of nylon, the catheter is a silicone tube or a rubber tube, and the sleeve and the external threaded joint are both made of polycarbonate.
[0020] Beneficial effects: The materials of the protective cap and the cap shell have high toughness and strength; the internal thread joint and the knob switch are made of nylon material with high strength and wear resistance; the catheter is a silicone tube or a rubber tube with good biocompatibility, does not react with drugs, does not adsorb drugs, and does not migrate harmful substances; the materials of the sleeve and the external thread joint have high bending strength and impact strength.
[0021] Furthermore, a protective tube is sleeved on the position where the rod of the internal threaded joint is sleeved with the catheter, and the protective tube is located on the outside of the catheter.
[0022] Beneficial effect: In this solution, the protective sleeve is located at the portion where the internal threaded joint and the catheter are connected, which can reduce external friction and scratches on the catheter connection portion, thereby ensuring the service life.
[0023] Furthermore, the protective cap is elastically and tightly matched with the internal thread joint, and the cap shell is elastically and tightly matched with the external thread joint.
[0024] Beneficial effects: In this solution, the protective cap and the cap shell are elastically and tightly matched with the internal thread joint and the external thread joint respectively, which can ensure the protective and shielding effects and facilitate disassembly.
[0025] Furthermore, the inner side of the protective cap has a rectangular hole, and the inner side of the cap shell is connected with a plurality of rectangular strips along its circumference.
[0026] Beneficial effects: The arrangement of the rectangular holes and the rectangular strips can leave gaps at the four corners of the protective cap and the cap shell, which facilitates the penetration and flow of gas during ethylene oxide sterilization of the product, improves the sterilization effect, and is also beneficial to the analysis of residual ethylene oxide gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:
[0028] Figure 1 This is a structural schematic diagram of an embodiment of a peritoneal dialysis external short tube of the utility model;
[0029] Figure 2 It is a longitudinal cross-sectional view of an embodiment of a peritoneal dialysis external short tube of the utility model;
[0030] Figure 3 It is a stereoscopic diagram of a protective cap in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0031] Figure 4 It is a top view of a protective cap in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0032] Figure 5 It is a stereoscopic diagram of an internal threaded connector in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0033] Figure 6 It is a longitudinal cross-sectional view of an internal threaded connector in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0034] Figure 7 This is a front view of a knob switch in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0035] Figure 8 It is a longitudinal cross-sectional view of a knob switch in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0036] Fig. 9 It is a stereoscopic diagram of a sleeve and a squeeze plate in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0037] Fig.10 It is a side view of a sleeve and a squeeze plate in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0038] Fig.11 for Fig.10 Sectional view at the middle BB;
[0039] Fig.12 This is a front view of an external threaded connector in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0040] Fig.13 It is a stereoscopic diagram of a cap shell in an embodiment of a peritoneal dialysis external short tube of the utility model;
[0041] Fig.14 It is a top view of a cap shell in an embodiment of a peritoneal dialysis external short tube of the utility model.
[0042] Marks and corresponding parts names in the attached drawings:
[0043] Protective cap 1, rectangular hole 101, internal thread joint 2, first anti-slip ring 201, anti-slip pattern 202, protective tube 3, conduit 4, knob switch 5, anti-slip teeth 501, extrusion cavity 502, limit end 503, limit cavity 504, sleeve 6, extrusion plate 601, pressure block 602, clamping end 603, external thread joint 7, second anti-slip ring 701, cap shell 8, rectangular strip 801. DETAILED DESCRIPTION
[0044] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0045] like Figure 1 , Figure 2 As shown, this embodiment provides a peritoneal dialysis external short tube, which is composed of an internal thread protective cap, an internal thread joint, a transfer tube, a silicone catheter, a knob switch, a sleeve, an external thread joint, and a cap shell. The protective cap and the cap shell are made of polyethylene, the internal thread joint and the knob switch are made of nylon, the catheter is a silicone tube or a rubber tube, and the sleeve and the external thread joint are made of polycarbonate. Specifically:
[0046] The knob switch 5 and the sleeve 6 are coaxially connected to the outside of the catheter 4. Turning the knob switch 5 can make one end of the sleeve 6 squeeze the catheter 4 to control the flow of the liquid medicine. The two ends of the catheter 4 are respectively provided with an internal threaded connector 2 and an external threaded connector 7.
[0047] like Figure 5 and Fig.12 As shown, the internal threaded joint 2 and the external threaded joint 7 both include a coaxially connected head and a rod, the rod of the internal threaded joint 2 is provided with a first anti-slip ring 201, and the rod of the external threaded joint 7 is provided with a second anti-slip ring 701, and the two ends of the catheter 4 are respectively sleeved on the rod of the internal threaded joint 2 and the rod of the external threaded joint 7, the first anti-slip ring 201 and the second anti-slip ring 701 can enhance the friction with the catheter 4 to ensure that the catheter 4 does not fall off, and the internal threaded joint 2 and the external threaded joint 7 are respectively covered with a protective cap 1 and a cap shell 8.
[0048] In this embodiment, the protective cap 1 is made of polyethylene material, which has high toughness and strength. In this embodiment, the protective cap 1 is elastically and tightly matched with the internal threaded joint 2. Figure 3 and Figure 4As shown, the inner side of the protective cap 1 has a rectangular hole 101, and the protective cap 1 can produce elastic deformation. The protective cap 1 covers the end of the internal threaded joint 2 to protect the internal threaded joint 2. At the same time, due to the setting of the square hole, a gap can be left after matching with the internal threaded joint 2, which is convenient for the gas to penetrate and flow during ethylene oxide sterilization of the product, thereby improving the sterilization effect and facilitating the analysis of residual ethylene oxide gas.
[0049] like Fig.13 and Fig.14 As shown, the cap shell 8 in this embodiment is also made of polyethylene PE material, which has high toughness and strength. Four rectangular strips 801 are connected to the inner side of the cap shell 8 along its circumference. The four rectangular strips 801 are evenly distributed around the inner side of the cap shell 8. The cap shell 8 is elastically and tightly matched with the external threaded joint 7. While protecting the external thread, the four rectangular strips 801 can leave gaps to facilitate the penetration and flow of gas during ethylene oxide sterilization of the product, thereby improving the sterilization effect and facilitating the analysis of residual ethylene oxide gas.
[0050] The arrangement of the cap shell 8 and the protective cap 1 in this embodiment can ensure that the external threaded joint 7 and the internal threaded joint 2 are not squeezed during transportation and storage, and at the same time ensure that the external threaded joint 7 and the internal threaded joint 2 are not directly contacted and contaminated when in use.
[0051] like Figure 5 and Figure 6 As shown, the head of the internal threaded connector 2 adopts a locking Luer connector design that can match the standard connector of peritoneal dialysis to ensure the air tightness of the pipeline. There are two first anti-slip rings 201 on the rod of the internal threaded connector 2. When the catheter 4 is sleeved on the rod of the internal threaded connector 2, it can play an anti-slip role and ensure the stability of the connection between the catheter 4 and the internal threaded connector 2.
[0052] The outer side of the head of the internal thread connector 2 is provided with a protective pattern, which is convenient for preventing slipping when using the internal thread connector 2. In this embodiment, the internal thread connector 2 is made of nylon PA material, which has high strength and wear resistance. Figure 1 and Figure 2 As shown, in this embodiment, a protective tube 3 is sleeved at the position where the rod of the internal threaded joint 2 and the catheter 4 are sleeved, and the protective tube 3 is located on the outside of the catheter 4. The protective tube 3 is sleeved on the portion where the internal threaded joint 2 and the catheter 4 are connected, reducing external friction and scratches on the connecting portion of the catheter 4, thereby ensuring the service life.
[0053] The catheter 4 is a silicone tube or a rubber tube. In this embodiment, the catheter 4 is made of medical silicone or rubber material, which has good biocompatibility, does not react with drugs, does not adsorb drugs, and does not migrate harmful substances. The diameter of the catheter 4 matches the internal thread connector 2 and the external thread connector 7, and can be elastically restored after bending without blocking the pipeline.
[0054] like Figure 2 As shown, the knob switch 5 is threadedly connected to the sleeve 6, one end of the sleeve 6 is threadedly connected to the external threaded connector 7, and the other end of the sleeve 6 is connected to at least two extrusion plates 601, which can produce elastic deformation and can extend into the knob switch 5. The catheter 4 passes through the knob switch 5 and the sleeve 6. Rotating the knob switch 5 can move the end of the extrusion plate 601 toward the catheter 4 to squeeze the catheter 4 to control the flow of the liquid medicine. In this embodiment, the knob switch 5 is made of nylon PA material with high strength and wear resistance. The sleeve 6 and the extrusion plate 601 are made of polycarbonate PC material with very high bending strength and impact strength. The knob switch 5 is designed in conjunction with the sleeve 6, and the silicone catheter 4 is squeezed by screwing to effectively control the flow of the liquid medicine.
[0055] Combination Figure 7 and Figure 8 As shown, the knob switch 5 is coaxially provided with a channel for the catheter 4 to pass through, and the inner side of the knob switch 5 is coaxially provided with a limit cavity 504 and an extrusion cavity 502 which are communicated with the channel, the limit cavity 504 has a limit end 503 at one end facing the sleeve 6, and the other end of the limit cavity 504 is communicated with the extrusion cavity 502, the extrusion cavity 502 is flared, and the end at which the extrusion cavity 502 is connected to the limit cavity 504 is the large end, and the other end of the extrusion cavity 502 is the small end, the large end of the extrusion cavity 502 refers to the end with the largest inner diameter, and the small end of the extrusion cavity 502 refers to the end with the smallest inner diameter, the extrusion cavity 502 is formed into a truncated cone as a whole, and the inner wall of the extrusion cavity 502 has a taper.
[0056] Combination Figure 2 , Fig. 9 , Fig.10 and Fig.11 As shown, a pressing block 602 is connected to the end of the extrusion plate 601, and the end of the pressing block 602 facing the sleeve 6 is a snap-fit end 603. The limiting end 503 of the limiting cavity 504 can be abutted against the snap-fit end 603. Rotating the knob switch 5 can make the side of the extrusion cavity 502 gradually squeeze the pressing block 602 toward the direction of the catheter 4, so that the pressing block 602 squeezes the catheter 4.
[0057] The pressing block 602 is in the shape of a triangular prism, and the ends of the pressing block 602 that abut against the limiting cavity 504 are both inclined surfaces that match each other. Figure 7 As shown, in this embodiment, a plurality of anti-slip teeth 501 are provided on the outer side of the knob switch 5 , and the plurality of anti-slip teeth 501 are distributed along the circumference of the knob switch 5 . The provision of the anti-slip teeth 501 can prevent slipping when the knob switch 5 is turned.
[0058] When the catheter 4 is not squeezed, the engaging end 603 of the pressing block 602 is positioned against the limiting end 503 of the limiting cavity 504. When it is necessary to squeeze the catheter 4 to change the flow rate of the drug solution, the knob switch 5 is screwed to move the knob switch 5 in the direction close to the sleeve 6, so that the pressing block 602 on the squeezing plate 601 is gradually squeezed inward by the conical surface of the squeezing cavity 502, so that the pressing block 602 gradually squeezes the catheter 4, deforms the catheter 4, and changes the channel size of the catheter 4, thereby achieving the purpose of controlling the flow rate of the drug solution in the catheter 4.
[0059] The specific implementation process is as follows: When the patient undergoes peritoneal dialysis, the peritoneal dialysis fluid needs to enter the patient's abdominal cavity through the peritoneal dialysis catheter 4, and then the peritoneal dialysis catheter 4 is closed to start peritoneal dialysis. When performing the next peritoneal dialysis, the peritoneal dialysis fluid previously infused also needs to be drained through the peritoneal dialysis catheter 4, and then new peritoneal dialysis fluid is infused according to the same process. After the dialysis is completed, the dialysis fluid bag port of the peritoneal dialysis external short tube is blocked with an iodine cap. This product (peritoneal dialysis external short tube) is used to aseptically connect and separate the peritoneal dialysis patient-end pipeline (or titanium joint) and the peritoneal dialysis fluid-end pipeline, and the flow of peritoneal dialysis fluid is prevented or allowed by the cooperation of the knob switch 5 and the sleeve 6.
[0060] Directions:
[0061] 1. Wear a mask and sterile gloves; soak the peritoneal dialysis patient end tubing (or titanium connector) in povidone-iodine solution (10%) for 5 minutes.
[0062] 2. Before use, first check whether the product packaging is intact; open the packaging bag at the tear position and take out the peritoneal dialysis external short tube; remove the internal thread protection cap, and screw the internal thread connector and the external thread of the peritoneal dialysis patient end pipeline (or titanium connector) until they are tightly connected; hold the knob switch and sleeve, and turn off the knob switch; remove the cap shell and replace it with an iodine solution protection cap, and disinfect and seal the external thread connector.
[0063] 3. During dialysis treatment, remove the iodine liquid protective cap and screw the external threaded connector to the membrane dialysis fluid end pipe connector until they are tightly connected. After the treatment, replace a new iodine liquid protective cap and screw it onto the external threaded connector, and then disinfect and seal the external threaded connector.
[0064] 4. When replacing the peritoneal dialysis external short tube, first clamp the peritoneal dialysis catheter, wipe the peritoneal dialysis patient end pipeline (or titanium connector) with sterile gauze soaked in povidone-iodine solution (10%) for at least one minute, and then remove the peritoneal dialysis external short tube.
[0065] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A peritoneal dialysis external short tube, comprising a catheter, a knob switch and a sleeve, wherein the knob switch and the sleeve are coaxially connected to the outside of the catheter, and turning the knob switch can cause one end of the sleeve to squeeze the catheter to control the flow of the liquid medicine, and the two ends of the catheter are respectively provided with an internal thread joint and an external thread joint, characterized in that: The internal thread joint and the external thread joint both include a coaxially connected head and a rod, the rod of the internal thread joint is provided with a first anti-slip ring, the rod of the external thread joint is provided with a second anti-slip ring, the two ends of the catheter are respectively sleeved on the rod of the internal thread joint and the rod of the external thread joint, and the internal thread joint and the external thread joint are respectively covered with a protective cap and a cap shell.
2. The peritoneal dialysis external short tube according to claim 1, characterized in that: The knob switch is threadedly connected to the sleeve, one end of the sleeve is threadedly connected to the external threaded joint, and the other end of the sleeve is connected to at least two extrusion plates, the extrusion plates can produce elastic deformation, the extrusion plates can extend into the knob switch, the catheter passes through the knob switch and the sleeve, and rotating the knob switch can move the end of the extrusion plate toward the catheter to squeeze the catheter to control the flow of the drug solution.
3. The peritoneal dialysis external short tube according to claim 2, characterized in that: The knob switch is coaxially provided with a channel for the passage of the catheter, and the inner side of the knob switch is coaxially provided with a limit cavity and an extrusion cavity communicated with the channel, the limit cavity has a limit end at one end facing the sleeve, and the other end of the limit cavity is communicated with the extrusion cavity, the extrusion cavity is flared, and the end of the extrusion cavity connected to the limit cavity is a large end, and the other end of the extrusion cavity is a small end, a pressing block is connected to the end of the extrusion plate, and the end of the pressing block facing the sleeve is a clamping end, the limit end can be abutted against the clamping end, and rotating the knob switch can make the side of the extrusion cavity gradually squeeze the pressing block toward the catheter direction so that the pressing block squeezes the catheter.
4. The peritoneal dialysis external short tube according to claim 3, characterized in that: The pressing block is in the shape of a triangular prism.
5. The peritoneal dialysis external short tube according to claim 3, characterized in that: The ends of the pressing block and the limiting cavity that abut against each other are inclined surfaces that match each other.
6. A peritoneal dialysis external short tube according to any one of claims 2 to 5, characterized in that: The outer side of the knob switch has a plurality of anti-slip teeth, and the plurality of anti-slip teeth are distributed along the circumference of the knob switch.
7. The peritoneal dialysis external short tube according to claim 2, characterized in that: The protective cap and the cap shell are both made of polyethylene, the internal thread joint and the knob switch are both made of nylon, the catheter is a silicone tube or a rubber tube, and the sleeve and the external thread joint are both made of polycarbonate.
8. The peritoneal dialysis external short tube according to claim 1, characterized in that: A protective tube is sleeved on the position where the rod of the internal thread joint is sleeved with the catheter, and the protective tube is located on the outside of the catheter.
9. The peritoneal dialysis external short tube according to claim 1, characterized in that: The protective cap is elastically and tightly matched with the internal thread joint, and the cap shell is elastically and tightly matched with the external thread joint.
10. The peritoneal dialysis external short tube according to claim 9, characterized in that: The inner side of the protective cap is provided with a rectangular hole, and the inner side of the cap shell is connected with a plurality of rectangular strips along the circumference thereof.