A pressure sleeve assembly for peritoneal dialysis and a tubing system for peritoneal dialysis

Abstract

The utility model provides a kind of anti-pressing cannula assembly for peritoneal dialysis and a kind of pipeline system for peritoneal dialysis.The anti-pressing cannula assembly includes a protective tube and a connector, and the protective tube is connected to the connector.The protective tube includes an extension part and at least one connecting part.The extension part is hollow and can be extended or retracted along the length direction.The extension part is provided with the connecting part on at least one side extending along the length direction.The connector is provided with a through hole, which is in communication with the interior of the protective tube, and the connector is connected to the connecting part.The utility model effectively prevents the pipeline from being crushed or folded during use, ensuring the smooth flow of dialysis fluid.

Description

Technical Field

[0001] This utility model relates to the field of peritoneal dialysis technology, specifically to a pressure-resistant sleeve assembly for peritoneal dialysis and a tubing system for peritoneal dialysis. Background Technology

[0002] Peritoneal dialysis is one of the preferred renal replacement therapies for patients with end-stage renal failure. Classified by operation method, peritoneal dialysis is divided into manual peritoneal dialysis and automated peritoneal dialysis. Compared with manual peritoneal dialysis, automated peritoneal dialysis has advantages such as more convenient operation, more flexible dialysis prescription adjustments, easier achievement of dialysis adequacy targets, and a lower incidence of peritonitis. Furthermore, automated peritoneal dialysis is often performed during nighttime sleep, making it easier for peritoneal dialysis patients to return to normal work, study, and other social activities. Clinically, automated peritoneal dialysis is benefiting an increasing number of end-stage renal failure patients.

[0003] Automated peritoneal dialysis typically requires a dedicated peritoneal dialysis machine tubing for the delivery and drainage of dialysate. However, currently available peritoneal dialysis machine tubing still has certain shortcomings. During patient treatment, especially during sleep at night, patient movement or localized pressure (such as from blankets or body weight) can easily compress the tubing segment connecting the external patient tubing to the patient end of the peritoneal dialysis machine tubing. This segment is usually made of flexible medical plastic tubing, which is easily flattened, folded, or even completely blocked under pressure. Deformation due to pressure can obstruct dialysate flow, significantly reduce flow rate, or even terminate the dialysis process, severely impacting the adequacy and safety of dialysis treatment. This can lead to treatment interruptions, alarms, and even potential complications.

[0004] Therefore, it is necessary to invent a structure that solves the problem of tubing pressure and improves the safety and convenience of treatment. Utility Model Content

[0005] The primary objective of this invention is to provide a pressure-resistant cannula assembly for peritoneal dialysis, which addresses the safety concerns arising from pressure on the aforementioned tubing.

[0006] The second objective of this invention is to provide a peritoneal dialysis tubing system, including the aforementioned peritoneal dialysis anti-pressure sleeve assembly.

[0007] To achieve the first objective of this utility model, this utility model provides a pressure-resistant cannula assembly for peritoneal dialysis, including a protective tube and a connector, wherein the protective tube is connected to the connector; the protective tube includes a telescopic part and at least one connecting part, the telescopic part is hollow and can extend and retract along the length direction, and the connecting part is provided on at least one side of the telescopic part extending along the length direction; the connector is provided with a through hole, the through hole communicates with the interior of the protective tube, and the connector is connected to the connecting part.

[0008] As can be seen from the above solution, the anti-pressure sleeve assembly provided by this utility model has a simple structure. The connector can be fixed to the patient-end connection tube of the disposable peritoneal dialysis tubing system. The patient-end connection tube can extend into the protective tube through the through hole of the connector. When in use, the anti-pressure sleeve assembly can be stretched to completely cover the end of the patient-end connection tube (i.e., the end of the patient-end connection tube away from the housing) and the short tube connected to the patient. A physical protective cover is set at the connection section most susceptible to pressure, reducing the risk of the tubing being bent, thereby improving the safety of treatment. Moreover, the retractable protective tube will not affect the connection between the patient's external tubing and the patient-end connection tube. It effectively prevents this section of tubing from being flattened or bent during use, ensuring unobstructed flow of dialysis fluid.

[0009] A further option is to have a number of mounting holes circumferentially arranged on the connecting part, and a number of snap fasteners circumferentially arranged on the end of the connector near the telescopic part, the number of snap fasteners being the same as the number of mounting holes, and the snap fasteners being able to match and connect with the mounting holes; or, the connector has a number of mounting holes circumferentially arranged on the connecting part, and a number of snap fasteners circumferentially arranged on the end of the connecting part near the connector, the number of snap fasteners being the same as the number of mounting holes, and the snap fasteners being able to match and connect with the mounting holes.

[0010] As can be seen from the above scheme, the connecting part and the connector are connected by a snap-fit. This structural design makes the connection process simple and quick, without the need for complicated tools or complicated operating steps, which can greatly improve the installation efficiency. At the same time, the matching connection method of the snap-fit ​​and the mounting hole can ensure that the connecting part and the connector are firmly connected. When subjected to various external forces such as circumferential force and axial force, it can effectively prevent the two from loosening or separating, ensuring the reliability and stability of the connection, and thus ensuring the pressure resistance effect of the pressure-resistant sleeve assembly.

[0011] A further option is to provide a sealing part at the end of the connector away from the expansion joint, with the diameter of the sealing part being larger than the diameter of the connecting part; the overlapping part when the connector and the connecting part are connected is the fixing part, with the outer diameter of the fixing part matching the inner diameter of the connecting part, or the inner diameter of the fixing part matching the outer diameter of the connecting part.

[0012] As can be seen from the above scheme, the sealing part prevents other impurities from entering the protective tube during use, thus ensuring the safety of use.

[0013] A further option is to have the side of the sealing part facing the telescopic part abut against the end of the connecting part away from the telescopic part.

[0014] As can be seen from the above solution, the above structure further improves the safety and connection stability of the product during use, and the abutting part can be further fixed between the connection part and the joint by means of hot melting, glue bonding or other methods.

[0015] A further option is to provide a protrusion along the circumferential direction in the connecting part.

[0016] As can be seen from the above scheme, the protrusions act as reinforcing ribs, effectively improving the strength and rigidity of the connection, enabling it to better withstand external loads, resist deformation and fracture, and avoid damage due to excessive force. At the same time, when subjected to complex stress, the reinforcing ribs can optimize stress distribution, disperse stress over a wider area, prevent local stress concentration from causing defects such as cracks, extend the service life of the connection, and ensure the safety and stability of the structure.

[0017] A further option is to use a telescopic corrugated pipe for the telescopic part.

[0018] As can be seen from the above solutions, the telescopic corrugated pipe has good extensibility and can freely expand and contract according to actual needs. It also has excellent flexibility and can be bent into various shapes, making it convenient for users to use, and its manufacturing cost is low.

[0019] To achieve the second objective of this utility model, this utility model provides a peritoneal dialysis tubing system, which includes a housing, branch pipes, and several connecting pipes. The branch pipes are disposed inside the housing, and the connecting pipes are all connected to the branch pipes. The connecting pipes include a patient connection end pipe, and the patient connection end pipe is covered with a peritoneal dialysis anti-pressure sleeve assembly as described above.

[0020] As can be seen from the above solution, the anti-pressure sleeve assembly is fixed to the patient connection end of the tubing. In the non-use / storage state, its length can be compressed to approximately 15cm to 40cm, making it compact and easy to package and store. In the use state, it can be manually stretched to an effective protective length of approximately 40cm to 100cm. This achieves excellent anti-pressure protection, and the anti-pressure sleeve assembly is integrated into the disposable peritoneal dialysis tubing system, requiring no user installation and making it more convenient to use.

[0021] A further option is that the anti-pressure sleeve assembly includes a protective tube and a connector. The protective tube is connected to the connector. The protective tube is hollow. The connector has a through hole. The inner diameter of the through hole matches the outer diameter of the patient connection tube. The inner diameter of the protective tube is larger than the outer diameter of the patient connection tube.

[0022] As can be seen from the above scheme, the inner diameter of the through hole matches the outer diameter of the patient connection end pipeline, ensuring the fixing effect of the anti-pressure sleeve assembly on the patient connection end pipeline and preventing the anti-pressure sleeve assembly from shifting during use and affecting the use effect; the inner diameter of the protective tube is larger than the outer diameter of the patient connection end pipeline, ensuring the smoothness of the extension and retraction of the protective tube during the extension and retraction process, and not affecting the internal pipeline.

[0023] A further option is that one of the connectors of the anti-pressure sleeve assembly is located at the end of the patient connection tube away from the box, and when the anti-pressure sleeve assembly is extended, the end of the patient connection tube away from the box is completely located inside the anti-pressure sleeve assembly.

[0024] As can be seen from the above scheme, the above structure ensures the normal functioning of the anti-pressure sleeve assembly.

[0025] A further option is that the connecting pipe also includes a heating end pipe, a replenishment end pipe, a last bag end pipe, and a waste liquid end pipe, all of which are connected to the branch pipe.

[0026] As can be seen from the above scheme, the above structure ensures the use of a pressure-resistant cannula assembly for peritoneal dialysis, which is used to enable users to perform peritoneal dialysis. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the anti-pressure sleeve assembly of this utility model.

[0028] Figure 2 This is an exploded view of the anti-pressure sleeve assembly of this utility model.

[0029] Figure 3 This is a cross-sectional view of the anti-pressure sleeve assembly of this utility model.

[0030] Figure 4 This is a schematic diagram of the peritoneal dialysis tubing system of this utility model.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0032] Anti-pressure sleeve assembly embodiment See Figures 1 to 3 The anti-pressure sleeve assembly 1 provided in this embodiment includes a protective tube 11 and at least one connector 12, which are connected. Specifically, the protective tube 11 includes a telescopic portion 112 and at least one connecting portion 111. The telescopic portion 112 is hollow and can extend and retract along its length. In this embodiment, there are two connecting portions 111, which are respectively located on both sides of the telescopic portion 112 extending along its length. In this embodiment, there is one connector 12, which is connected to the connecting portion 111. In this embodiment, a portion of the connector 12 is located within one of the connecting portions 111. The telescopic portion 112 is a telescopic corrugated pipe.

[0033] The connector 12 includes a sealing part 123 and a fixing part 124. The fixing part 124 is closer to the telescopic part 112 than the sealing part 123. The overlapping part when the connector 12 is connected to the connecting part 111 is the fixing part 124. In this embodiment, the fixing part 124 extends into the connecting part 111. A plurality of snap fasteners 121 are provided circumferentially at the end of the fixing part 124 near the telescopic part 112. A plurality of mounting holes 114 are provided circumferentially at the connecting part 111 where the connector 12 is located. The number of snap fasteners 121 is the same as the number of mounting holes 114, and the snap fasteners 121 can be matched and connected with the mounting holes 114. The diameter of the sealing part 123 is larger than the outer diameter of the connecting part 111, and the outer diameter of the fixing part 124 matches the inner diameter of the connecting part 111. In other embodiments, the fixing part may also have a plurality of mounting holes circumferentially at the end of the fixing part near the telescopic part. The connecting part with the connector may have a plurality of snap fasteners circumferentially, the number of snap fasteners being the same as the number of mounting holes, and the snap fasteners can be matched and connected with the mounting holes. The diameter of the sealing part is larger than the outer diameter of the connecting part, and the inner diameter of the fixing part matches the outer diameter of the connecting part. The side of the sealing part 123 facing the telescopic part 112 abuts against the end of the connecting part 111 where the connector 12 is provided, away from the telescopic part 112. In addition to the snap-fit ​​connection, the connecting part 111 and the connector 12 in this embodiment can also be permanently fixed to the connector 12 and the protective tube 11 by further setting interference fit, hot melt, adhesive bonding, etc. Specifically, the shape of the connector 12 can be set as cylindrical, square, or other structures that are conducive to gripping and prevent rotation.

[0034] The connector 12 is provided with a through hole 122 along a first direction, which is the length direction of the telescopic part 112. The through hole 122 is connected to the interior of the protective tube 11.

[0035] The two connecting parts 111 are provided with protrusions along the circumference, and the protrusions act as reinforcing ribs.

[0036] In this embodiment, both the protective tube 11 and the connector 12 are made of medical-grade rigid plastic, possessing good biocompatibility, chemical stability, and physical properties, and meeting stringent medical device safety standards.

[0037] The material and structural design of the anti-pressure sleeve assembly 1 in this embodiment endow it with good radial elasticity and axial compressive strength. When subjected to external pressure (such as body pressure), its tube wall can effectively disperse and buffer the pressure, preventing the internally encased pipeline from being crushed.

[0038] Examples of peritoneal dialysis tubing systems See Figure 4 The peritoneal dialysis tubing system of this embodiment includes a pressure-resistant sleeve assembly 1, a box body 2, a branch pipe 3, multiple connecting pipes 4, multiple branch pipes 5, and multiple connectors 6.

[0039] The box body 2 includes an upper cover 21 and a lower cover 22, which are fitted together to form the box body 2. The box body 2 has an internal cavity. Branch pipes 3 and branch tubes 5 are disposed within the box body 2. Each branch pipe 3 has multiple connection ports, which connect to multiple branch pipes 5. Each branch pipe 5 is connected to multiple connecting pipes 4 via multiple connectors 6. The connectors 6 are fixed to the box body 2 to prevent pipe bending and to ensure communication between the branch pipes 3 and the multiple connecting pipes 4.

[0040] The connecting tube 4 includes a patient connection tube 41, a heating tube 42, a fluid replenishment tube 43, a bag end tube 44, and a waste fluid end tube 45.

[0041] A patient-end connector 411 is provided at the end of the patient connection tube 41 furthest from the branch tube 3. The patient-end connector 411 is used to connect to the patient's external short tube, i.e., to communicate with the implanted tube. The anti-pressure sleeve assembly 1 described in the previous embodiment is sleeved on the side of the patient connection tube 41 near the patient-end connector 411. In this embodiment, the distance between the connector 12 of the anti-pressure sleeve assembly 1 and the patient-end connector 411 is 10cm to 30cm. The patient-end connector 411 is provided with a hand-touch prevention structure, specifically, a protective sleeve is provided on the outside of the patient-end connector 411, and a protective cap 48 cooperates with the protective sleeve. During use, the protective sleeve portion is held and the protective cap 48 is unscrewed to prevent direct contact between the hand and the connector, which facilitates disinfection and avoids contamination.

[0042] The inner diameter of the through hole 122 of the connector 12 of the anti-pressure sleeve assembly 1 matches the outer diameter of the patient connection end tube 41. The connector 12 of the anti-pressure sleeve assembly 1 is fixed to the patient connection end tube 41, specifically by means well known to those skilled in the art, such as snap-fit, heat fusion, bonding, or integral molding. In this embodiment, the telescopic part 112 of the anti-pressure sleeve assembly 1 can be compressed to 15cm to 40cm in length when not in use / retracted. When in use, it can be manually stretched to an effective protective length of 40cm to 100cm. When in use, the anti-pressure sleeve assembly can be stretched to completely cover the end of the patient connection end tube (i.e., the end of the patient connection end tube away from the box) and the short tube connected to the patient. A physical protective cover is set at the connection section that is most susceptible to pressure, reducing the risk of the tube being bent, thereby improving the safety of treatment. Moreover, the telescopic nature of the protective tube will not affect the connection between the patient's external tube and the patient connection end tube.

[0043] One end of the heating end pipe 42 is connected to one of the branch pipes 5, and the other end of the heating end pipe 42 is connected to the dialysate bag on the heating plate of the peritoneal dialysis machine.

[0044] One end of the replenishment tubing 43 is connected to one of the branch pipes 5, and the other end of the replenishment tubing 43 is provided with several four-way connectors and / or three-way connectors, thereby forming multiple replenishment tubing branches 432. In this embodiment, it includes two four-way connectors 431, forming five replenishment tubing branches 432. In other embodiments, the other end of the replenishment tubing 43 can also be connected to a three-way connector, forming two replenishment tubing branches; or the other end of the replenishment tubing 43 can also be connected to a four-way connector, forming three replenishment tubing branches; or the other end of the replenishment tubing 43 can also be connected to a four-way connector and a three-way connector, forming four replenishment tubing branches. The specific number of four-way connectors and / or three-way connectors can be set according to actual needs. The end of each replenishment tubing branch 432 away from the four-way connector 431 is connected to a replacement dialysate bag.

[0045] One end of the end-bag tubing 44 is connected to one of the branch pipes 5, and the other end of the end-bag tubing 44 is connected to the dialysate in the last bag.

[0046] One end of the waste liquid end pipe 45 is connected to one of the branch pipes 5, and the other end of the waste liquid end pipe 45 is provided with a waste liquid end connector 454, which is used to connect to a waste liquid tank for waste liquid discharge. A sampling branch 451 is provided on the side of the waste liquid end pipe 45 near the waste liquid end connector 454, and the sampling branch 451 is connected to the waste liquid end pipe 45 via a tee connector 452. A sampling connector 453 is provided at the end of the sampling branch 451 away from the tee connector 452.

[0047] In this embodiment, when in use, the box 2 is installed on the mounting structure of the peritoneal dialysis machine to be used with the peritoneal dialysis machine. Then, the connecting tube 4 is connected to the waste liquid tank, implantation tube, dialysis fluid bag, etc., respectively. There is no need to install each tube to the machine one by one, reducing installation errors and making it more convenient and safer to use.

[0048] The heating end tubing 42, the infusion end tubing 43, and the end bag tubing 44 are all equipped with an infusion connector 47 or a puncture device at the end furthest from the box body 2. The infusion connector 47, the patient end connector 411, the waste fluid end connector 454, and the sampling connector 453 are all protected by protective caps 48, which can be unscrewed during use.

[0049] The patient connection line 41, heating line 42, fluid replenishment line 43, end bag line 44, and waste fluid line 45 are all equipped with stop-fluid clamps 46. The stop-fluid clamps 46 on different lines can be different colors, and different colors are designed to distinguish the functions of different lines.

[0050] In this embodiment, the peritoneal dialysis tubing system is made entirely of medical-grade materials, and the preparation and assembly of each part are carried out according to processes well known to those skilled in the art. Before packaging, the entire system is sterilized, and the pressure-resistant sleeve assembly is stored in a retracted state.

[0051] In use, the user unpacks the sterile packaging and removes the peritoneal dialysis tubing system. Connect the tubing to the peritoneal dialysis machine and dialysate / waste bag according to standard operating procedures. Securely connect the patient end connector 411 of the patient connection tubing to the patient's external tubing. After connecting the patient, manually extend the telescopic section 112 from its compressed state to the desired length. Ensure that the extended telescopic section 112 completely covers the connection section from the end of the patient connection tubing to the external tubing, and covers as much of the external tubing body as possible. Start the peritoneal dialysis machine for treatment. During treatment, even if the patient accidentally rotates or there is localized pressure on the area covered by the telescopic protective tubing, the elastic pressure-resistant structure of the pressure-resistant sleeve assembly 1 effectively disperses pressure, maintains the circular cross-section of the internal tubing, and ensures unobstructed dialysate flow. After treatment, compress the telescopic section 112 back to its retracted state and disconnect it from the external tubing. Dispose of the entire tubing system according to medical waste disposal regulations.

[0052] The peritoneal dialysis tubing system of this embodiment includes a pressure-resistant sleeve assembly. It has a simple structure, and the connector can be fixed to the patient-end connection tubing of the peritoneal dialysis tubing system. The patient-end connection tubing can extend through the through-hole of the connector into the protective tube. In use, the pressure-resistant sleeve assembly can stretch and completely cover the end of the patient-end connection tubing (i.e., the end of the patient-end connection tubing furthest from the housing 2) and the patient's external short tubing. A physical protective shield is provided at the most pressure-prone connection section, reducing the risk of tubing bending and thus improving treatment safety. Furthermore, the retractable protective tube does not affect the connection between the patient's external tubing and the patient-end connection tubing. This effectively prevents the tubing from being flattened or bent during use, ensuring unobstructed dialysis fluid flow, significantly improving treatment safety and effectiveness, and reducing treatment alarms and interruptions. Patients (especially those with nocturnal APD) do not need to worry excessively about tubing compression due to changes in body posture, allowing for more freedom of movement and significantly improving treatment experience and sleep quality. The entire peritoneal dialysis tubing system's anti-compression device is integrated into the tubing itself, eliminating the need for additional accessories. The ingeniously designed telescopic section allows for easy stretching to reach the required protective length during use, providing a wide and snug fit. After treatment, it can be easily compressed and reset, facilitating tubing organization and final disposal, meeting the convenience requirements of single-use products. As a single-use product, it completely eliminates the risk of cross-infection, requiring no cleaning or disinfection, simplifying clinical procedures and reducing costs.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure-resistant cannula assembly for peritoneal dialysis, characterized in that: Includes a protective tube and a connector, wherein the protective tube is connected to the connector; The protective tube includes a telescopic part and at least one connecting part. The telescopic part is hollow and can extend and retract along the length direction. At least one side of the telescopic part extending along the length direction is provided with a connecting part. The connector is provided with a through hole, which communicates with the interior of the protective tube, and the connector is connected to the connecting part.

2. The anti-pressure cannula assembly for peritoneal dialysis as described in claim 1, characterized in that: The connecting part is provided with a plurality of mounting holes along the circumference, and the end of the connector near the telescopic part is provided with a plurality of buckles along the circumference. The number of buckles is the same as the number of mounting holes, and the buckles can be matched and connected with the mounting holes. Alternatively, the connector may have a plurality of mounting holes along its circumference, and the connecting part may have a plurality of snap fasteners along its circumference at one end near the connector, the number of snap fasteners being the same as the number of mounting holes, and the snap fasteners being able to match and connect with the mounting holes.

3. The anti-pressure cannula assembly for peritoneal dialysis as described in claim 1, characterized in that: The end of the connector away from the telescopic part is provided with a sealing part, and the diameter of the sealing part is larger than the diameter of the connecting part; The overlapping part when the connector is connected to the connecting part is the fixing part, and the outer diameter of the fixing part matches the inner diameter of the connecting part, or the inner diameter of the fixing part matches the outer diameter of the connecting part.

4. The anti-pressure cannula assembly for peritoneal dialysis as described in claim 3, characterized in that: The side of the sealing part facing the telescopic part abuts against the end of the connecting part away from the telescopic part.

5. A peritoneal dialysis anti-pressure cannula assembly as described in any one of claims 1 to 4, characterized in that: The connecting part has a protrusion along the circumferential direction.

6. A peritoneal dialysis anti-pressure cannula assembly as described in any one of claims 1 to 4, characterized in that: The telescopic part is a telescopic corrugated pipe.

7. A peritoneal dialysis tubing system, comprising a housing, branch tubing, and a plurality of connecting tubing, wherein the branch tubing is disposed within the housing, and the connecting tubing is connected to the branch tubing, each connecting tubing including a patient connection end tubing, characterized in that: The patient connection tubing is fitted with a pressure-resistant sleeve assembly for peritoneal dialysis as described in any one of claims 1 to 6.

8. The peritoneal dialysis tubing system as described in claim 7, characterized in that: The pressure-resistant sleeve assembly includes a protective tube and a connector. The protective tube is connected to the connector. The protective tube is hollow. The connector has a through hole, and the inner diameter of the through hole matches the outer diameter of the patient connection end tubing.

9. A peritoneal dialysis tubing system as described in claim 7, characterized in that: One of the connectors of the anti-pressure sleeve assembly is located at the end of the patient connection tube away from the box, and when the anti-pressure sleeve assembly is extended, the end of the patient connection tube away from the box is completely located inside the anti-pressure sleeve assembly.

10. A peritoneal dialysis tubing system as described in any one of claims 7 to 9, characterized in that: The connecting pipe also includes a heating end pipe, a replenishment end pipe, a final bag end pipe, and a waste liquid end pipe, all of which are connected to the branch pipe.

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