Peritoneal dialysis connector and screwing tool thereof

Abstract

The utility model discloses a peritoneal dialysis connector and a screwing tool thereof, and relates to the field of peritoneal dialysis device structures, and the peritoneal dialysis connector comprises a dialysis bag connector which is used for being installed on a dialysis bag or a connecting pipe of the dialysis bag; the dialysis bag connector can be inserted into the lock cover, a through hole is formed in the lock cover, and a peritoneal dialysis catheter penetrates through the through hole and enters the lock cover to be connected with the dialysis bag connector; the lock cover can be movably connected with the other end of the dialysis bag connector; the outer radial end part of the insertion end, inserted into the lock cover, of the dialysis bag connector is gradually reduced; when the lock cover is connected with the dialysis bag connector, the inner wall of the lock cover can generate locking extrusion force on the joint of the peritoneal dialysis catheter and the dialysis bag connector. The outer diameter of the insertion end, inserted into the lock cover, of the dialysis bag connector is arranged to be of the conical structure gradually decreasing towards the end, and the step structure is arranged to be matched with the lock cover, so that the purposes of improving the installation convenience degree of the connector and avoiding liquid leakage are achieved.

Description

Technical Field

[0001] The utility model relates to the field of peritoneal dialysis device structures, in particular to a peritoneal dialysis joint and a screwing tool thereof. Background Art

[0002] The peritoneal dialysis connector is used to connect the peritoneal dialysis external short tube to the peritoneal dialysis catheter buried in the human abdominal cavity, and it needs to be operated by medical staff during use. Traditional peritoneal dialysis connectors are mostly made of titanium or titanium alloy materials, which are very bulky and inconvenient to use: the connecting joints and spiral lock caps of the peritoneal dialysis connectors have no friction surface and no force surface. When connecting the peritoneal dialysis connector to the peritoneal dialysis external short tube or to the peritoneal dialysis catheter, the operator needs to use a lot of force, which is inconvenient to use. The connecting joint of the peritoneal dialysis titanium connector adopts ordinary threaded connection, which makes the product inconvenient to use and leaks. How to design a peritoneal dialysis connector with a reasonable structure and avoid inconvenience in use and leakage is a problem that needs to be solved urgently.

[0003] In view of this, this application is hereby filed. Utility Model Content

[0004] The utility model aims to provide a peritoneal dialysis connector, which solves the problems of inconvenient connector installation and easy leakage in the prior art by setting the outer diameter of the insertion end of the dialysis bag connector inserted into the locking cover to a tapered structure that gradually decreases toward the end and cooperates with the locking cover.

[0005] The utility model embodiment is implemented by the following technical solution: The utility model embodiment provides a peritoneal dialysis connector, including:

[0006] Dialysis bag connector: used to be installed on the dialysis bag or the connecting tube of the dialysis bag;

[0007] Locking cover: The dialysis bag connector can be inserted into the locking cover, and a through hole is provided on the locking cover, and the through hole is used for the peritoneal dialysis catheter to pass through and enter the locking cover to connect with the dialysis bag connector;

[0008] The locking cover can be movably connected to the other end of the dialysis bag connector;

[0009] The outer radial end of the insertion end of the dialysis bag connector inserted into the locking cover is gradually reduced;

[0010] When the locking cover is connected to the dialysis bag connector, the inner wall of the locking cover can generate a locking squeezing force on the connection between the peritoneal dialysis catheter and the dialysis bag connector;

[0011] A plurality of step structures are arranged on the outer side of the insertion end of the dialysis bag connector inserted into the locking cover.

[0012] Preferably, the peritoneal dialysis connector is made of PEEK material, and the dialysis bag connector includes a guide tube and a force-retaining mechanism, which is sleeved on the outside of the guide tube. The guide tube can be connected to the peritoneal dialysis catheter, and the end of the locking cover can be connected to the end of the force-retaining mechanism.

[0013] Preferably, the locking cover is provided with an internal thread, the force-applying mechanism is provided with an external thread, and the locking cover and the force-applying mechanism are connected via threads.

[0014] Preferably, the force-applying mechanism is a polygonal column structure.

[0015] Preferably, anti-slip patterns are provided on the outer wall of the lock cover.

[0016] Preferably, the guide tube is a rigid structure for providing support when the peritoneal dialysis catheter is sheathed on the outside of the guide tube.

[0017] Preferably, when the locking cover is connected to the dialysis bag connector, the inner wall of the locking cover fits the peritoneal dialysis catheter.

[0018] Preferably, the inner wall of the lock cover is provided with an anti-slip structure.

[0019] In order to better realize the installation process of the above-mentioned peritoneal dialysis connector, in an embodiment of the present utility model, a peritoneal dialysis connector screwing tool is also provided, including the above-mentioned peritoneal dialysis connector, the locking cover and the dialysis bag connector are configured for screwing operation, and also includes a connector fixing piece and a screwing piece, the connector fixing piece is used to be sleeved on the outside of the dialysis bag connector, and the screwing piece is used to be sleeved on the outside of the locking cover;

[0020] The relative rotation of the joint fixing part and the screwing part can control the tightening and separation of the locking cover and the dialysis bag joint;

[0021] A plurality of protrusions are arranged on the outer sides of the joint fixing part and the screwing part.

[0022] Preferably, an opening is provided on a side surface of the screwing member.

[0023] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0024] 1. A peritoneal dialysis connector provided by an embodiment of the utility model has one end of the dialysis bag connector installed on the dialysis bag or the connecting tube of the dialysis bag, and the other end of the dialysis bag connector is connected to the peritoneal dialysis catheter connected to the abdomen, so as to achieve the purpose of connecting the dialysis bag with the abdominal cavity. At the same time, a locking cover is provided, and a through hole is provided on the locking cover, so that the other end of the dialysis bag connector and the peritoneal dialysis catheter can be inserted into the locking cover on both sides, that is, the connection between the dialysis bag connector and the peritoneal dialysis catheter will be hidden in the locking cover, and the inner wall of the locking cover will generate a locking squeezing force on the connection between the dialysis bag connector and the peritoneal dialysis catheter, which plays a role in stabilizing and strengthening the connection between the dialysis bag connector and the abdomen. For the purpose of connection stability and sealing of the connection of the membrane dialysis catheter, in the embodiment of the utility model, the outer diameter of the insertion end of the dialysis bag connector inserted into the locking cover is set to a structure that gradually decreases toward the end, which can improve the connection stability between the peritoneal dialysis catheter and the dialysis bag connector, and facilitate the insertion of the dialysis bag connector into the peritoneal dialysis catheter. Because during the use and installation process, the peritoneal dialysis catheter is generally a hose, and the peritoneal dialysis catheter is sleeved on the insertion end of the dialysis bag connector inserted into the locking cover to achieve connection and communication. This gradual tapered structure combined with the step structure can improve the connection stability of the connection between the peritoneal dialysis catheter and the dialysis bag connector.

[0025] 2. The embodiment of the utility model provides a force-applying mechanism to facilitate the operator to apply force to the dialysis bag connector during installation. At the same time, the force-applying mechanism can be threadedly connected to the locking cover to achieve a locking state of the connection between the peritoneal dialysis catheter and the dialysis bag connector by the locking cover, further improving the connection stability and sealing of the entire peritoneal dialysis connector.

[0026] 3. The peritoneal dialysis connector screwing tool provided in the embodiment of the utility model is applicable not only to the peritoneal dialysis connector shortening structure in the prior art (i.e., no lengthening force mechanism is separately provided), but also to the peritoneal dialysis connector with the lengthening structure (with the force mechanism) provided in the embodiment of the utility model, thereby improving the convenience of connecting and disassembling the locking cover and the dialysis bag connector. The screwing tool can be installed during use and disassembled after use, and is simple to operate and use, and can be repeatedly used.

[0027] In general, a peritoneal dialysis connector provided by an embodiment of the utility model is configured such that the outer diameter of the insertion end of the dialysis bag connector inserted into the locking cover is set to a tapered structure that gradually decreases toward the end, and a step structure is provided to cooperate with the locking cover, so as to achieve the purpose of improving the convenience of connector installation and avoiding leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of a peritoneal dialysis connector provided in an embodiment of the utility model;

[0030] Figure 2 A schematic diagram of the lock cover structure provided by an embodiment of the utility model;

[0031] Figure 3 A schematic diagram of the structure of a dialysis bag connector provided in an embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the structure of a peritoneal dialysis connector screwing tool provided in an embodiment of the utility model.

[0033] Marks and corresponding parts names in the attached drawings:

[0034] 1-dialysis bag connector, 2-locking cover, 3-through hole, 4-conducting tube, 5-force mechanism, 6-anti-slip pattern, 7-external thread, 8-internal thread, 9-step structure, 10-fixing part, 11-screwing part, 12-protrusion, 13-opening. DETAILED DESCRIPTION

[0035] 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 and completely 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. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Example

[0039] like Figure 1 As shown, the embodiment of the utility model provides a peritoneal dialysis connector, including: a dialysis bag connector 1: used to be installed on a dialysis bag or a connecting tube of a dialysis bag to allow the flow of dialysis fluid; a locking cover 2: the dialysis bag connector 1 can be inserted into the locking cover 2, and a through hole 3 is provided on the locking cover 2. The through hole 3 is used to allow the peritoneal dialysis catheter to pass through and enter the locking cover 2 to connect with the dialysis bag connector 1, ensuring the flow of dialysis fluid and the sealing of the dialysis process; the locking cover 2 can be movably connected to the other end of the dialysis bag connector 1, which is not only convenient for installation, but also can ensure the locking cover 2 and the dialysis bag connector 1 are connected stably; the outer radial end of the insertion end of the dialysis bag connector 1 inserted into the locking cover 2 gradually decreases, that is, a tapered structure, which is convenient for insertion into the peritoneal dialysis catheter and stable connection with the peritoneal dialysis catheter, and the tapered structure forms a tight connection to reduce the risk of leakage; when the locking cover 2 is connected to the dialysis bag connector 1, the inner wall of the locking cover 2 can generate a locking squeezing force on the connection between the peritoneal dialysis catheter and the dialysis bag connector 1, ensuring the sealing and stability of the joint, preventing the leakage of the dialysate and the slipping between the peritoneal dialysis catheter and the dialysis bag connector 1.

[0040] Specifically, when in use, the dialysis bag connector 1 is connected and communicated with the dialysis bag or the connecting tube of the dialysis bag, allowing the stable flow of the dialysate. After the peritoneal dialysis catheter passes through the through hole 3, the locking cover 2 is sleeved on the outside of the peritoneal dialysis catheter, and then the end of the peritoneal dialysis catheter is sleeved on the outside of the dialysis bag connector 1, so as to achieve the connection and communication between the peritoneal dialysis catheter and the dialysis bag connector 1. Then the locking cover 2 is moved to change the position of the locking cover 2 along the outside of the peritoneal dialysis catheter, and finally the purpose of the stable connection between the locking cover 2 and the dialysis bag connector 1 is achieved. At this time, the inner wall of the locking cover 2 will generate a locking squeezing force on the connection between the peritoneal dialysis catheter and the dialysis bag connector 1, preventing the peritoneal dialysis catheter and the dialysis bag connector 1 from slipping and the connection failure. The entire structure is not only stable in connection, but also has strong sealing performance. In the embodiment of the utility model, the insertion end of the dialysis bag connector 1 inserted into the locking cover 2 is set to a tapered structure with a gradually decreasing outer radial end, which facilitates the insertion of the dialysis bag connector 1 into the peritoneal dialysis catheter, is easy to operate, and more importantly, helps to form a tight connection and reduce the risk of leakage.

[0041] In order to improve the sleeve connection stability between the peritoneal dialysis catheter and the guide tube 4, a plurality of step structures 9 can be provided outside the insertion end of the dialysis bag connector 1 inserted into the lock cover 2, for example, Figure 3As shown, two step structures 9 are provided. Of course, in other embodiments, one, three or even more step structures 9 may be provided. There is no limitation here and the step structures 9 may be provided specifically according to actual needs. In the embodiment of the utility model, the step structure 9 may be used as a positioning mark to help the user correctly insert the dialysis bag connector 1 into the locking cover 2 to ensure the correct direction and position. The step structure 9 may also increase the friction between the dialysis bag connector 1 and the locking cover 2 to make the connector more stable during insertion and use.

[0042] In order to facilitate the operator to exert force on the dialysis bag connector 1 when installing the peritoneal dialysis connector, in the embodiment of the utility model, the dialysis bag connector 1 includes a guide tube 4 and a force mechanism 5. When installed, the guide tube 4 is connected to the peritoneal dialysis catheter to allow the flow of dialysate. The force mechanism 5 is sleeved on the outside of the guide tube 4, or it can be integrally arranged with the guide tube 4. The end of the locking cover 2 can be connected to the end of the force mechanism 5. The force mechanism 5 can provide additional stability and support to ensure that the connection between the guide tube 4 and the peritoneal dialysis catheter is firm. It is important to provide enough force points for the installation of the connector. In the actual design process, the length of the force mechanism 5 is not limited, and it can be specifically set according to actual conditions. The end of the locking cover 2 is connected to the end of the force mechanism 5 to form a closed system, which can further ensure the sealing during the dialysis process and prevent the leakage of the dialysate. At the same time, the stability and firmness of the locking extrusion force of the inner wall of the locking cover 2 on the connection between the peritoneal dialysis catheter and the dialysis bag connector 1 are ensured.

[0043] It should be noted that the connection between the lock cover 2 and the force mechanism 5 is preferably a detachable connection, and the detachable connection facilitates the flexibility of installation and disassembly. For example, Figure 2 and Figure 3 As shown, the lock cover 2 is provided with an internal thread 8, and the force mechanism 5 is provided with an external thread 7. The lock cover 2 and the force mechanism 5 are connected by threads. The internal thread 8 of the lock cover 2 and the external thread 7 of the force mechanism 5 are screwed together to achieve a tight connection between the two. This connection method not only provides good sealing, but also can be easily disassembled when needed. The threaded connection ensures the connection stability between the lock cover 2 and the force mechanism 5, preventing accidental falling off or leakage during the dialysis process. Of course, in other embodiments, the connection between the lock cover 2 and the force mechanism 5 can be a card connection or the like, which is not limited here, as long as the purpose of stable connection effect and detachable effect can be achieved.

[0044] The force mechanism 5 increases the length to facilitate the operator to connect the lock cover 2 with the peritoneal dialysis catheter. In the embodiment of the utility model, the force mechanism 5 is preferably a polygonal prism structure, which can be a hexagonal prism, a triangular prism, a quadrangular prism, etc., because the polygonal prism structure can provide good stability and gripping force, making it more stable during the connection and operation process, so that the user can easily apply force during operation, whether tightening or loosening the lock cover 2 or squeezing and installing. Of course, anti-skid patterns 6 can also be set on the outer wall of the lock cover 2. The anti-skid patterns 6 increase the surface roughness of the outer wall of the lock cover 2 to increase the friction when contacting with the user's fingers, thereby reducing the wrong operation or accidental fall-off caused by hand slippage. When performing peritoneal dialysis operations, the user needs to hold the lock cover 2 stably to tighten or loosen it. The anti-skid patterns 6 can provide a better gripping feeling to ensure the stability of the operation. Even in a slippery or liquid environment, the anti-skid patterns 6 can provide additional gripping force to ensure that the user can operate safely even under adverse conditions.

[0045] As a preferred embodiment of the present invention, the guide tube 4 is a rigid structure, which is used to provide support when the peritoneal dialysis catheter is sleeved on the outside of the guide tube 4. The rigid structure of the guide tube 4 provides stable support for the peritoneal dialysis catheter. When the peritoneal dialysis catheter is sleeved on the outside of the guide tube 4, the guide tube 4 can maintain the fixed position of the catheter to prevent it from shifting or bending during the dialysis process. Because the peritoneal dialysis catheter is generally made of flexible silicone material, the rigid guide tube 4 can facilitate the sleeve of the peritoneal dialysis catheter. After the peritoneal dialysis catheter is sleeved, the guide tube 4 will not deform and will not affect the flow of the dialysate. More preferably, the peritoneal dialysis connector is made of PEEK material, because PEEK has good biocompatibility, is suitable for contact with the human body, reduces adverse reactions to human tissues, and also has good strength and rigidity, so that the guide tube 4 can provide stable support for the peritoneal dialysis catheter. PEEK also has good chemical corrosion resistance and heat resistance. What is important is that the density of PEEK material is lower than that of existing titanium or titanium alloy materials. Even if the embodiment of the utility model is provided with an extended force mechanism 5, the weight of the entire dialysis connector is smaller than that of the prior art. Therefore, the use of PEEK material can not only ensure the quality of the peritoneal dialysis connector, but also reduce the weight of the peritoneal dialysis connector and improve the convenience of use.

[0046] In order to improve the locking stability of the locking cover 2 on the connection between the peritoneal dialysis catheter and the dialysis bag connector 1, in the embodiment of the utility model, when the locking cover 2 is connected to the dialysis bag connector 1, the locking cover 2 is set so that its inner wall fits the peritoneal dialysis catheter, which can increase the contact area between the peritoneal dialysis catheter and the inner wall of the locking cover 2, thereby improving the sealing and stability of the entire dialysis connector connection. Of course, an anti-skid structure can also be set on the inner wall of the locking cover 2, which can increase the friction between the inner wall of the locking cover 2 and the peritoneal dialysis catheter, thereby reducing the sliding or displacement of the catheter during the dialysis process.

[0047] In order to better realize the installation process of the above-mentioned peritoneal dialysis connector, in the embodiment of the utility model, a peritoneal dialysis connector screwing tool is also provided, and the screwing operation of the locking cover 2 of the peritoneal dialysis connector and the dialysis bag connector 1 includes a connector fixing part 10 and a screwing part 11, wherein the connector fixing part 10 is used to be sleeved on the outside of the dialysis bag connector 1, and the screwing part 11 is used to be sleeved on the outside of the locking cover 2; the relative rotation of the connector fixing part 10 and the screwing part 11 can control the tightening and separation of the locking cover 2 and the dialysis bag connector 1; a plurality of protrusions 12 are provided on the outside of the connector fixing part 10 and the screwing part 11. For example, Figure 4 As shown, the side wall of the peritoneal dialysis connector on the side where it is connected to the lock cover 2 is in the shape of a polygonal column, the connector fixing member 10 is in the shape of a cylindrical sleeve, and the inner side wall is in the shape of a polygonal column that matches the outer side wall of the peritoneal dialysis connector. When the connector fixing member 10 is sleeved on the peritoneal dialysis connector, the connector fixing member 10 and the peritoneal dialysis connector will not rotate relative to each other, and the connector fixing member 10 has a fixing effect on the peritoneal dialysis connector. Since a plurality of protrusions 12 are provided on the outer side of the connector fixing member 10, the protrusions 12 can facilitate the operator to apply force and avoid slipping. Similarly, the outer wall of the side where the lock cover 2 is connected to the dialysis bag connector 1 is also in the shape of a polygonal column, the screwing member 11 is a cylindrical hollow structure, and the inner wall is in the shape of a polygonal column that matches the outer wall of the lock cover 2. When the screwing member 11 is sleeved on the lock cover 2, the cooperation between the screwing member 11 and the lock cover 2 can limit their relative rotation. When the operator applies force to the screwing member 11, the lock cover 2 can be driven to rotate relative to the dialysis bag connector 1, thereby achieving the tightening or separation between the lock cover 2 and the dialysis bag connector 1. The protrusion 12 on the outside of the screwing member 11 can prevent the operator from slipping when applying force. After the tightening or separation between the lock cover 2 and the dialysis bag connector 1 is achieved, the connector fixing member 10 and the screwing member 11 can be disassembled and recycled. As a preferred embodiment of the utility model, an opening 13 can be provided on the side of the screwing member 11, and the opening 13 can bypass the peritoneal dialysis catheter to allow the screwing member 11 to be installed on the lock cover 2 or the screwing member 11 to be disassembled.

[0048] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the utility model omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the utility model.

Claims

1. A peritoneal dialysis connector, characterized in that: include: Dialysis bag connector (1): used for installation on a dialysis bag or a connecting tube of a dialysis bag; Locking cover (2): the dialysis bag connector (1) can be inserted into the locking cover (2), and the locking cover (2) is provided with a through hole (3), and the through hole (3) is used to allow the peritoneal dialysis catheter to pass through and enter the interior of the locking cover (2) to connect with the dialysis bag connector (1); The locking cover (2) can be movably connected to the dialysis bag connector (1); The insertion end of the dialysis bag connector (1) inserted into the locking cover (2) is arranged such that the outer radial end portion gradually decreases; When the locking cover (2) is connected to the dialysis bag connector (1), the inner wall of the locking cover (2) can generate a locking squeezing force on the connection between the peritoneal dialysis catheter and the dialysis bag connector (1); A plurality of step structures (9) are arranged on the outer side of the insertion end of the dialysis bag connector (1) inserted into the locking cover (2).

2. A peritoneal dialysis connector according to claim 1, characterized in that: The peritoneal dialysis connector is made of PEEK material. The dialysis bag connector (1) comprises a guide tube (4) and a force-retaining mechanism (5). The force-retaining mechanism (5) is sleeved on the outside of the guide tube (4). The guide tube (4) can be connected to a peritoneal dialysis catheter. The end of the locking cover (2) can be connected to the end of the force-retaining mechanism (5).

3. A peritoneal dialysis connector according to claim 2, characterized in that: The locking cover (2) is provided with an internal thread (8), the force-carrying mechanism (5) is provided with an external thread (7), and the locking cover (2) and the force-carrying mechanism (5) are connected via threads.

4. A peritoneal dialysis connector according to claim 2, characterized in that: The force-applying mechanism (5) is a multi-prism structure.

5. A peritoneal dialysis connector according to claim 1, characterized in that: Anti-slip patterns (6) are provided on the outer wall of the lock cover (2).

6. A peritoneal dialysis connector according to claim 2, characterized in that: The guide tube (4) is a rigid structure, used to provide support when the peritoneal dialysis catheter is sleeved on the outside of the guide tube (4).

7. A peritoneal dialysis connector according to claim 6, characterized in that: When the locking cover (2) is connected to the dialysis bag connector (1), the inner wall of the locking cover (2) fits against the peritoneal dialysis catheter.

8. A peritoneal dialysis connector according to claim 7, characterized in that: The inner wall of the lock cover (2) is provided with an anti-slip structure.

9. A peritoneal dialysis connector screwing tool, comprising the peritoneal dialysis connector according to any one of claims 1 to 8, wherein the locking cover (2) and the dialysis bag connector (1) are configured for screwing operation, characterized in that: It also comprises a connector fixing member (10) and a screwing member (11), wherein the connector fixing member (10) is used to be sleeved on the outside of the dialysis bag connector (1), and the screwing member (11) is used to be sleeved on the outside of the locking cover (2); The relative rotation of the connector fixing member (10) and the screwing member (11) can control the tightening and separation of the locking cover (2) and the dialysis bag connector (1); A plurality of protrusions (12) are provided on the outer sides of the joint fixing piece (10) and the screwing piece (11).

10. A peritoneal dialysis connector screwing tool according to claim 9, characterized in that: An opening (13) is provided on the side surface of the screwing member (11).

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