CN118340960A

CN118340960A - Disposable peritoneal dialysis drainage bag

Info

Publication number: CN118340960A
Application number: CN202410582182.1A
Authority: CN
Inventors: 丁谦明; 吴光明
Original assignee: Suzhou Dezhongfu Medical Instrument Co ltd
Current assignee: Suzhou Dezhongfu Medical Instrument Co ltd
Priority date: 2024-03-05
Filing date: 2024-03-05
Publication date: 2024-07-16
Also published as: CN118370891A; CN117815471A; CN117815471B

Abstract

The invention discloses a disposable peritoneal dialysis drainage bag, which comprises: a first bag for collecting fluid expelled during peritoneal dialysis; the first bag body comprises: a reservoir bag having a bag connection end and a bag end connector fixedly connected to the bag connection end; the bag end connector is made of non-PVC materials; one end of the body tube and a plane sheet body are welded between the bag mouth film layers, and the plane sheet body is tiled between the two bag mouth film layers; the transmission pipe assembly comprises a first transmission pipe, a second transmission pipe, a protective cap and a peritoneal dialysis tee joint; the peritoneal dialysis tee joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint; the protective cap is detachably covered on the dialysis luer connector; one end of the first transmission pipe is fixedly communicated with the liquid inlet joint, and the other end of the first transmission pipe is used for being communicated with a second bag body containing dialysis liquid medicine; the second transmission pipe is fixedly communicated with the liquid outlet joint and the bag end joint.

Description

Disposable peritoneal dialysis drainage bag

The application relates to a split application with the application number of 202410246122.2, the application date of 2024, 03 and 05 days and the name of disposable non-PVC peritoneal dialysis drainage bag.

Technical Field

The application relates to the field of medical supplies, in particular to a disposable non-PVC peritoneal dialysis drainage bag and a peritoneal dialysis suit.

Background

Peritoneal dialysis is to utilize the characteristic that the peritoneal membrane is used as a semi-permeable membrane, and the prepared dialysate is regularly and regularly poured into the peritoneal cavity of a patient through a catheter by the action of gravity, and the solute on the high concentration side moves to the low concentration side (dispersion effect) due to the concentration gradient difference of the solute on the two sides of the peritoneal membrane; moisture moves from the hypotonic side to the hypertonic side (osmosis). The peritoneal dialysis solution is continuously replaced to achieve the purposes of removing metabolic products and toxic substances in the body and correcting water and electrolyte balance disturbance.

In the prior art, for Continuous Ambulatory Peritoneal Dialysis (CAPD), the patient himself can manually exchange the dialysis fluid, for example, 2 to 5 times per day. The luer tee joint matched with the peritoneal dialysis drainage bag is of a split type structure, so that the split type peritoneal dialysis drainage bag is required to be manufactured separately in the process, the whole manufacturing and assembling procedures of the peritoneal dialysis drainage bag are complex, manual butt joint assembly is usually adopted, the manufacturing efficiency is low, and the disposable medical consumable is affected by the increase of cost.

In addition, when the joint adopted by the waste liquid bag of the existing peritoneal dialysis is inserted into the bag end of the waste liquid bag for welding, the film layers on the upper side and the lower side of the joint pipe need to be in face-to-face joint and wrap the joint pipe in the butt joint process, at the moment, if the position precision of the joint pipe is insufficient or the precision of the welding head is reduced, the butt joint gap is formed at the position of the joint pipe near the butt joint of the two film layers easily, effective sealing cannot be formed, and defective products are further caused. As a follow-up procedure, the joint tube of the existing waste liquid bag is bonded by glue solution when the PVC conduit is connected, the assembly procedure is also complex, manual operation is needed, the manufacturing efficiency is affected, and the manufacturing cost is restricted.

Disclosure of Invention

In view of the shortcomings of the current peritoneal dialysis drainage bag, an object of the present application is to provide a novel disposable non-PVC peritoneal dialysis drainage bag, so as to simplify the assembly process and save the manufacturing cost.

In order to achieve the above purpose, the application adopts the following technical scheme:

a single use non-PVC peritoneal dialysis drainage bag comprising:

A first bag for collecting fluid expelled during peritoneal dialysis; the first bag body comprises: a reservoir bag having a bag connection end and a bag end connector fixedly connected to the bag connection end; the bag connecting end is provided with a bag mouth film layer which is connected oppositely; the bag end connector is provided with a body pipe and a plane sheet body integrally arranged on the outer side wall of the body pipe; one end of the body tube and the plane sheet body are welded between the bag mouth film layers, and the plane sheet body is tiled between the two bag mouth film layers;

The transmission pipe assembly comprises a first transmission pipe, a second transmission pipe, a protective cap and a peritoneal dialysis tee joint; the peritoneal dialysis tee joint is provided with a dialysis luer joint, a liquid inlet joint and a liquid outlet joint; the protective cap is detachably covered on the dialysis luer connector; the dialysis luer connector is used for connecting an abdominal penetration external connecting pipe;

one end of the first transmission pipe is fixedly communicated with the liquid inlet joint, and the other end of the first transmission pipe is used for being communicated with a second bag body containing dialysis liquid medicine;

the second transmission pipe is fixedly communicated with the liquid outlet joint and the bag end joint;

The peritoneal dialysis tee joint with the dialysis luer joint, the liquid inlet joint and the liquid outlet joint is integrally formed by injection molding.

Preferably, the planar sheet body has a fusion portion fused with the bag mouth film layer.

Preferably, the plane sheet body comprises connecting sheets symmetrically distributed on two sides of the body tube; the thickness of the connecting sheet is 0.01-1.5 mm, and the length along the radial direction is 0.5-10 mm; the length of the connecting sheet along the length direction of the body pipe is 1 mm-10 mm.

Preferably, the bag connecting end is provided with at least one welding strip part for welding the bag mouth film layer relatively; the number of the plane sheets is equal to that of the welding strip parts, and the plane sheets are aligned one by one in the width direction of the first bag body.

Preferably, the bag connecting end and the bag end are welded and formed at one time, and the welding strip part is formed.

Preferably, the body tube is provided with two or more planar sheets in a length direction thereof; the shape of the connecting sheet of the two plane sheets is the same.

Preferably, the spacing distance between two adjacent plane sheets is 3-15 mm.

Preferably, the connection tab has an inner end connecting the body tube and an outer end remote from the body tube; the thickness of the connecting sheet gradually decreases from the inner end to the outer end.

Preferably, the outer end is provided with convex parts and concave parts which are staggered along the length direction of the body pipe.

Preferably, the end of the second transmission pipe is sleeved outside the bag end connector in a non-adhesive fit mode.

Preferably, the bag end connector is provided with a first connecting end connected with the second transmission pipe and a second connecting end connected with the first bag body; the first connecting end is provided with at least one elevation step facing the second connecting end; the elevation step is fixedly sleeved in the second transmission pipe.

Preferably, the first connecting end is provided with a diameter-reducing part and an expansion part; the diameter-reducing part is positioned at one side of the expansion part, which is close to the second connecting end, and the annular interface of the diameter-reducing part and the expansion part forms the elevation step.

Preferably, the peritoneal dialysis tee joint is made of non-PVC materials; wherein the dialysis luer connector material comprises a matrix material and an elastic material; the weight percentage of the matrix material and the elastic material is above 50%; the matrix material is PP or PE or TPEE.

Preferably, the peritoneal dialysis tee comprises a main body tube segment;

The dialysis luer connector is arranged at one end of the main body pipe section along the length direction of the main body pipe section; the liquid inlet connector and the liquid outlet connector are arranged at the other end of the main pipe section; one end of the main body pipe section is provided with an end flange plate, and the dialysis luer connector is positioned at one side of the end flange plate away from the main body pipe section; the side wall of the main pipe section is provided with a wing plate; the included angle between the liquid inlet connector and the liquid outlet connector is an acute angle or a right angle;

the main body pipe section, the dialysis luer connector, the liquid inlet connector and the liquid outlet connector are of an injection molding integrated structure.

Preferably, the dialysis luer connector comprises an outer tube sleeve which is integrally molded by injection molding and an inner connector coaxially positioned in the outer tube sleeve; the outer tube sleeve comprises a light wall section and a connecting section positioned on one side of the light wall section, which is close to the main tube section; the inner wall of the smooth wall section is a smooth wall surface, and the inner wall of the connecting section is provided with threads and a luer structure.

Preferably, the pipe wall thickness of the outer pipe sleeve is 0.1-3 mm, and the hardness of the outer pipe sleeve is 30-60 Shore D.

Preferably, the pipe end of the first transmission pipe is sleeved outside the liquid inlet joint in a non-adhesive fit manner; the pipe end non-adhesive joint sleeve of the second transmission pipe is arranged outside the liquid outlet joint.

Preferably, at least one of the liquid inlet joint and the liquid outlet joint is provided with at least one connecting step facing the main pipe section; the connecting step is fixedly sleeved in the transmission pipe.

Preferably, at least one of the liquid inlet joint and the liquid outlet joint is provided with a reducing section and an expansion section, and the annular interface of the reducing section and the expansion section forms the connecting step; the diameter-reducing section is positioned at one side of the expansion section, which is close to the main pipe section; the outer diameter of the diameter-reducing section is larger than the inner diameter of the butted transmission pipe.

Preferably, the length of the reduced diameter section is more than one third of the inner diameter of the first or second transfer tube.

Preferably, the expansion section is of cylindrical or conical structure; the expansion section is provided with 1, or 2, or 3 expansion sections.

Preferably, the ends of the first transmission pipe and the second transmission pipe are fixedly sleeved outside the liquid inlet joint and the liquid outlet joint through deformation, and the other end of the second transmission pipe is fixedly sleeved outside the bag end joint through deformation; the deformation mainly comprises elastic deformation.

The beneficial effects are that:

In the invention, the butt joint gap of the two bag mouth film layers during butt joint can be filled by the existence of the plane sheet body. Of course, more because of the existence of the plane lamellar body, two sack retes need not closely to dock in body pipe one side, only need keep two hugs closely in plane lamellar body surface and can weld, so to whole bag end joint's butt joint position requirement lower to can obtain higher yield, corresponding, welding seal quality is higher.

In the invention, the peritoneal dialysis tee joint is of an integral structure, not of a split structure, so that the integral peritoneal dialysis tee joint with the dialysis luer joint, the liquid inlet joint and the liquid outlet joint is of an injection molding integral structure, further split and separate manufacturing and assembly are not needed, the manufacturing efficiency can be improved, and the peritoneal dialysis tee joint has no split connection part and has higher self structural strength.

The injection molding time of the peritoneal dialysis tee joint adopting the structure of the embodiment is 4/15 seconds, the original PVC tee joint structure is inserted on the dialysis luer joint, and then the manufacturing process of high-frequency welding is carried out, and one peritoneal dialysis tee joint is assembled for about 1/7 seconds, so that the peritoneal dialysis drainage bag greatly improves the manufacturing efficiency, saves the manufacturing cost, can reduce the procedures of manual assembly and improves the manufacturing level of the process.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a disposable peritoneal dialysis set according to one embodiment of the present invention;

FIG. 2 is a schematic view of the first bag of FIG. 1;

FIG. 3 is a schematic view of the bag end connector of FIG. 2;

FIG. 4 is a cross-sectional view, A-A, and a partial enlarged view of FIG. 3;

FIG. 5 is a schematic view providing six different cross-sectional shapes of the connecting sheet of FIG. 4;

FIG. 6 is a schematic view of the construction of the bag end fitting of FIG. 2 providing 4 different shapes;

FIG. 7 is a schematic cross-sectional view of the attachment tab and the bag port film layer of FIG. 3;

FIG. 8 is a schematic diagram showing a comparison of the cross-section of the connecting sheet before and after welding with the bag port film layer;

FIG. 9 is a schematic cross-sectional view of the bag end fitting of FIG. 1 connected to a second transfer tube;

FIG. 10 is a schematic cross-sectional view of a bag end fitting and a second transfer tube according to another embodiment of the present invention;

FIG. 11 is a perspective view of the peritoneal dialysis tee of FIG. 1;

FIG. 12 is another view of FIG. 11;

FIG. 13 is a front view of FIG. 12;

FIG. 14 is an elevation view of a peritoneal dialysis tee joint according to another embodiment of the present invention;

FIG. 15 is a schematic view of a connection between a transmission pipe and a joint according to another embodiment of the present invention;

FIG. 16 is an elevation view of a peritoneal dialysis tee joint according to another embodiment of the present invention;

fig. 17 is a front view of a peritoneal dialysis tee structure according to another embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-17, one embodiment of the present application provides a single use non-PVC peritoneal dialysis drainage bag comprising: the first bag 6, the transfer tube assembly 50.

Wherein the first bag 6 is used for collecting fluid discharged during peritoneal dialysis. Specifically, the first bag 6 can be used as a waste liquid bag, and can collect waste liquid or body fluid discharged from the abdominal cavity of the human body to the outside during peritoneal dialysis.

As shown in fig. 1, the transfer tubing assembly 50 includes a first transfer tubing 3, a second transfer tubing 4, a protective cap 8, and a peritoneal dialysis tee 10. As shown in fig. 2 to 8, the peritoneal dialysis tee 10 has a dialysis luer 15, a fluid inlet 12, and a fluid outlet 11. The protective cap 8 is detachably closed on the dialysis luer fitting 15. The protective cap 8 is a flexible protective cap 8 made of non-PVC material, and is covered on the dialysis luer connector 15, so that the dialysis luer connector 15 is prevented from being polluted. The protective cap 8 is provided with a pull ring, and a user can pull the protective cap 8 out of the tectorial membrane dialysis three-way joint 10 by virtue of the pull ring. The dialysis luer fitting 15 is used for connecting an peritoneal dialysis extension tube (peritoneal dialysis extension tube). An outer abdominal tube is used to connect the delivery tube assembly 50 to the abdominal catheterization outside the body, preventing or allowing the flow of the coated dialysate or waste fluid. The peritoneal dialysis extension tube is connected with the dialysis luer fitting 15 in a male-female luer fitting manner.

The disposable non-PVC peritoneal dialysis drainage bag can form a peritoneal dialysis set with the second bag body 20. The second bag 20 is a solution bag, which may also be referred to as a drug solution bag, and contains an abdomen-penetrating drug solution therein, and has a rectangular bag structure as a whole. The second bag body 20 has a second bag attachment end 25; the first transfer tube 3 of the disposable non-PVC peritoneal dialysis drainage bag of this embodiment communicates with the second bag connection end 25.

In this embodiment, the transfer tubes (the first transfer tube 3 and the second transfer tube 4) of the disposable non-PVC peritoneal dialysis drainage bag are made of non-PVC materials. Specifically, the first transfer tube 3 and the second transfer tube 4 are transfer tubes, and are also transfer hoses. One end of the first transmission pipe 3 is fixedly communicated with the liquid inlet joint 12, and the other end is communicated with a second bag body 20 containing dialysis liquid medicine. The second transmission pipe 4 is fixedly communicated with the liquid outlet joint 11 and the first bag body 6. The material of the transmission pipe comprises a matrix material and an elastic material; the weight percentage of the matrix material and the elastic material is above 50%; the matrix material is PP or PE.

As shown in fig. 1 and 2, the first bag body 6 includes a liquid storage bag and a bag end connector 5 fixedly connected to one end of the liquid storage bag. The end of the liquid storage bag connecting bag end connector 5 is a bag connecting end 61. The bag end connector 5 is of an injection molding integrated structure. The bag end connector 5 is made of non-PVC materials. The material of the bag end connector 5 may be similar to or the same as that of the three-way joint 10 for tectorial membrane dialysis, and preferably, the material of the bag end connector 5 is the same as that of the three-way joint 10 for tectorial membrane dialysis. Specifically, the material of the bag end connector 5 includes a base material and an elastic material. Wherein the matrix material and the elastic material are main component materials of the bag end connector 5, and the weight percentage of the matrix material and the elastic material is more than 50%; the matrix material is PP or PE. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS.

In this embodiment, the bag end connector 5 is connected in a centered position on the bag connector 61. The first bag body 6 has a bag attachment end 61 welded to the second attachment end 502. The bag end joint 5 is fixedly connected with the second transmission pipe 4. The pipe end of the second transmission pipe 4 is sleeved outside the bag end joint 5 in a non-adhesive fit mode. The fixed connection mode of non-adhesive bonding can adopt machinery to push the pipe end out of the joint in a cold way, so that manual pushing and glue smearing are not needed, and the manufacturing efficiency is improved.

As shown in fig. 3 to 6, the bag end connector 5 extends in the longitudinal direction H thereof; the bag end fitting 5 has a first connection end 501 for connecting to the second transfer tube 4 and a second connection end 502 for connecting to the first bag body 6. The main materials of the bag end connector 5 and the second transmission pipe 4 in the embodiment are the same, so that the two are convenient to attach in the connection state, and then an attaching sealing structure can be formed due to the fact that the materials are similar, and connection leakage is avoided. The first connection end 501 is provided with at least one elevation step 54 facing the second connection end 502. The elevation step 54 is fixedly sleeved inside the second transmission pipe 4.

As shown in fig. 3, the first connecting end 501 is provided with a reduced diameter portion 56 and an expanded portion 55. The diameter-reduced portion 56 is located at a side of the expansion portion 55 near the second connection end 502, and an annular interface between the diameter-reduced portion 56 and the expansion portion 55 forms a vertical step 54. As shown in fig. 9 and 10, the pipe end 41 of the second transmission pipe 4 is non-adhesively attached to the outside of the first connection end 501 of the bag-end fitting 5 by means of the configuration of the elevation step 54, the reduced diameter portion 56 and the expansion portion 55. Wherein the outer diameter of the reduced diameter portion 56 is larger than the inner diameter of the second transfer tube 4. Further, when the first sleeve portion 412 corresponding to the reduced diameter portion 56 is retracted, the pipe end 41 of the second transmission pipe 4 is still in a state of being expanded by the reduced diameter portion 56, and is in close contact (non-adhesive contact) with the outer wall of the reduced diameter portion 56, thereby improving the connection strength and ensuring the sealing performance.

Specifically, the width of the elevation step 54 is between 1 and 20 mm. By means of the elevation step 54, a hooking structure can be formed for the pipe end 41 of the second transfer pipe 4. The second transmission pipe 4 is contracted and reduced under the condition of elastic recovery of the second transmission pipe through the elevation step 54, and then the elevation step 54 hooks the second transmission pipe 4 to form a stop for the second transmission pipe 4, as shown in fig. 9 and 10, and the stability of connection is ensured by forming a physical hooking structure on the basis of the close connection of the two.

The outer edge of the end of the bag end fitting 5 has an end chamfer 551 to reduce the outer diameter of the end to be smaller than the inner diameter of the second transfer tube 4, the diameter at the port of the end chamfer 551 being smaller than the inner diameter of the second transfer tube 4. Thus, the end of the bag end connector 5 is conveniently inserted into the pipe end 41 of the second transmission pipe 4 by means of the end chamfer 551 when the extrusion is pushed in, and the pipe end 41 of the second transmission pipe 4 is gradually pushed in to expand. Of course, the expansion 55 located outermost (lowest when facing fig. 3) is preferably of conical configuration to facilitate the expansion of the tube end 41 of the second transfer tube 4 by squeezing in.

As shown in fig. 9, the pipe end 41 of the second transmission pipe 4 mainly includes a first sleeve portion 412 sleeved outside the reduced diameter portion 56 and a second sleeve portion 411 sleeved on the expansion portion 55, wherein the inner diameter of the first sleeve portion 412 is larger than the inner diameter of the second transmission pipe 4 (non-pipe end portion), that is, the first sleeve portion 412 is still in a state of being enlarged and expanded by the reduced diameter portion 56, so as to ensure that the first sleeve portion and the second sleeve portion are tightly sealed. The second sleeve 411 is sleeved outside the expansion part 55 and is tightly attached to the outer wall of the expansion part 55.

In order to form an effective physical hooking structure, the length of the diameter-reducing portion 56 is more than one third of the inner diameter of the second transmission pipe 4, that is, L is equal to or greater than D/3, L is the length of the diameter-reducing portion 56, and D is the inner diameter of the second transmission pipe 4 (in an unjacketed natural state). For example, when the inner diameter of the second transfer tube 4 is 6m, the length of the reduced diameter portion 56 is 2mm or more.

The expansion 55 is of cylindrical or conical configuration. As shown in fig. 10, the bag-end connector 5 may have a plurality of elevation steps 54 thereon to form a multi-stage hooking structure, so as to ensure the connection strength of the second transfer pipe 4 and the corresponding bag-end connector 5. Further, 1,2, or 3 expansion portions 55 are provided, and 1,2, or 3 reduction portions 56 are provided. In the embodiment shown in fig. 10, the two vertical steps 54 (54 a, 54 b), the expansion portions 55 (55 a, 55 b) and the diameter-reduced portions 56 (56 a, 56 b) are all provided, and the second transfer pipe 4 is sleeved on the vertical steps 54 (54 a, 54 b), the expansion portions 55 (55 a, 55 b) and the diameter-reduced portions 56 (56 a, 56 b) to form a secondary hooking structure.

In the existing connection process lacking the planar sheet 52, seam gaps are easily generated when two bag mouth membrane layers 611 are butted at two sides of the joint of the single tube body, particularly at the butt joint position of the bag mouth membrane layers 611, so that higher reject ratio is caused, the welding position of the joint of the single tube body structure is required to be very accurate, the generation of the seam gaps is avoided, and the two bag mouth membrane layers 611 and the single tube body form a complete circular sealing structure.

As shown in fig. 1, 3, 7 and 8, the bag-end fitting 5 includes a body tube 51 and a planar sheet 52 provided on a side wall of the body tube 51. The flat sheet 52 is integrally provided on the body tube 51, and is injection molded integrally with the body tube 51. The pouch connection end 61 has a pouch mouth film 611 oppositely attached. The body tube 51 and the planar sheet 52 are fixedly sandwiched between two bag-opening film layers 611a, 611 b. The planar sheet 52 is laid flat between the two pocket film layers 611a, 611 b. The planar sheet 52 extends in a radial direction. The planar sheet is tiled between the two pocket membrane layers 611 so that the two pocket membrane layers 611 are distributed on two sides of the planar sheet 52 in a mirror symmetry manner, thereby ensuring the welding sealing quality.

Wherein, the bag connecting end 61 and the second connecting end 502 of the bag end connector 5 can be welded by power frequency pulse (also called as power frequency heating welding). By means of the existence of the plane sheet body 52, the bag end connector 5 is positioned between the two bag mouth film layers 611 and then welded for one time, so that the sealing of the first bag body 6 and the fixed connection of the first bag body 6 and the bag end connector 5 can be realized, and the sealing strip 65 for sealing the bag connecting end 61 is formed by welding.

As shown in fig. 7 and 8, the planar sheet 52 is partially melted and integrated with the film layer during welding, and the planar sheet 52 further has a fusion portion 525 fused with the pouch film layer 611. The planar sheet 52 (the connection sheet 5211 in fig. 8) in the state of being connected to the first bag 6 has a smaller area or a smaller radial length than the planar sheet 52 (the connection sheet 5212 in fig. 8) in the state of being not connected to the first bag 6. In the welding process, the area of the planar sheet 52 can be partially lost, and the lost area of the planar sheet 52 and the bag mouth film 611 are fused to form an integrated structure, so that the connection area of the first bag body 6 and the bag end connector 5 is integrally improved, the bonding strength of the first bag body 6 and the bag end connector 5 is ensured, the connection stability of the bag end connector 5 and the first bag body 6 is ensured, and the problem of falling off is avoided. In this case, it is schematically shown in fig. 8 that the connecting webs 5211 remaining after soldering have a reduced area or radial length compared to the connecting webs 5212 in the unconnected state.

In the end-to-bag joint 5 of this embodiment, by providing the planar sheet 52, the two bag-opening film layers 611a and 611b cover the body tube 51 and span the body tube 51, and cover the planar sheet 52 on both sides of the body tube 51, even if a butt joint gap exists between the two bag-opening film layers 611a and 611b, the corresponding butt joint gap can be filled by the existence of the planar sheet 52. Of course, more because of the planar sheet 52, the two bag mouth film layers 611 are not required to be closely abutted on one side of the body tube 51, and only need to be kept tightly attached to the surface of the planar sheet 52 for welding, so that the requirement on the abutting position of the whole bag end connector 5 is lower, higher yield can be obtained, and correspondingly, the welding sealing quality is higher.

In this embodiment, the planar sheet 52 includes connection sheets 521 (521 a, 521 b) distributed on both sides of the main body pipe 51, and the connection sheets 521 have a sheet structure. In the unassembled state, the connection tabs 521a, 521b are symmetrically distributed on both sides of the body tube 51. The thickness of the connection sheet 521 is 0.01 to 1.5mm, and the length in the radial direction is 1 to 10mm. The length L1 of the connection sheet 521 in the longitudinal direction H of the main body pipe is 1 to 10mm, and preferably, the length L1 is 3 to 8mm. The number of the connection sheets 521 may be 2 or more, and they may be symmetrically distributed. The body tube 51 is provided with two or more flat pieces 52 along the length direction H thereof. Preferably, the connecting sheets 521 of the two planar sheets 52 have the same shape. The connecting sheet 521 has an inner end connected to the body tube 51 and an outer end distant from the body tube 51, and the thickness of the connecting sheet 521 gradually decreases from the inner end to the outer end in order to fill the butt-joint gap of the bag-mouth film 611.

The shape of the attachment tab 521 is various. In this embodiment, the shape of the connection sheet (longitudinal section, section in the view shown in fig. 3) is rectangular. In other embodiments, as shown in fig. 6a to 6d, the outer edge of the connecting sheet 521 may be saw-toothed, and in this case, the outer end of the connecting sheet 521 is provided with convex portions and concave portions staggered along the length direction H of the body tube. The convex portions and the concave portions may be arranged at equal intervals or irregularly, and the convex portions and the concave portions may be identical or different, and preferably, the convex portions and the concave portions have identical shapes. Similarly, the cross-sectional shape of the connecting sheet 521 of the different planar sheet 52 may be different, and as shown in fig. 5, the cross-section of the connecting sheet 521 may be a triangular spike shape, a rectangular shape, an irregular shape, or the like, which is not limited in any way.

Considering that if the smooth body tube is directly welded to the pouch connection end 61, the outer wall surface of a part of the body tube is melted to be fused with the pouch mouth film layer 611 of the pouch connection end 61 during welding, and the melted part of the body tube is easily overflowed to form undesired protruding foreign matters, the welding quality is affected inside the pouch mouth film layer 611, resulting in poor sealing.

As shown in fig. 3, in order to ensure the connection quality between the second connection end 502 and the bag connection end 61, the second connection end 502 is further provided with a connection convex ring 58 on the outer wall of the body tube 5151, and the connection convex ring 58 protrudes from the outer wall surface of the body tube 51. The width W2 of the connecting collar 58 along the length direction H of the body tube is 0.5mm to 2mm. The height of the outer wall surface of the protruding body tube 51 of the connection convex ring 58 is 0.05mm to 1mm. The connection collars 58 are disposed between the connection tabs 521 on both sides of the body pipe 51, and one end of the connection collars 58 continuously extends from one connection tab 521a to the other connection tab 521b. With the connecting tab 521 as a symmetrical interface, the connecting collars 58 are mirror-symmetrically disposed on either side of the connecting tab 521.

Specifically, the outer wall area of the body tube 51 corresponding to the planar sheet 52 is a connection area, and the length of the connection area along the length direction H is equal to the length of the planar sheet 52 along the length direction H, which is L1. Two or more connecting convex rings 58 are distributed in the connecting area along the length direction H, and the interval between two adjacent connecting convex rings 58 is 0.5 mm-2 mm. A filling groove is formed between two adjacent connecting collars 58. Of the plurality of connecting collars 58, one connecting collar 58 is aligned with one side edge of the connecting tab 521 and the other connecting collar 58 is aligned with the other side edge of the connecting tab 521. In the embodiment having a plurality of planar sheets 52 on the body tube 51, as shown in fig. 3, two planar sheets 52 (two pairs of connection sheets 521) are provided on the body tube 51, and correspondingly, two connection areas are provided on the body tube 51 to correspondingly provide the connection convex rings 58.

Through being equipped with the connection bulge loop 58 that the interval was arranged to form between connection bulge loop 58 and fill out the flat groove, and then in welded in-process connection bulge loop 58 is first melted to the side overflow and flows into filling out the flat groove, so be difficult to form protruding foreign matter and influence welding quality in the junction area, the connection bulge loop 58 highly reduces gradually under high temperature welding, gradually with the filling out the flat groove of overflow flush constitution level joint surface, with sack rete 611 looks welding fuses, and then constitute the connection structure that welding quality is better, this kind of connection structure can reduce the welding accuracy requirement to sack terminating 5 and bonding tool, and provide the connection structure that the quality is better, reduce the manufacturing technology degree of difficulty.

As shown in fig. 2 and 3, the bag connecting end 61 has at least one welding strip 570 for welding the bag mouth film 611 to each other; the number of the planar pieces 52 is equal to the number of the welding bars 570, and aligned one by one in the width direction of the first bag 6. The welding strip 570 extends continuously from one side to the other side in the width (left-right direction when facing fig. 1) of the first bag body 6, and spans the bag end joint 5. The pouch-connecting end 61 is welded to the pouch-end joint 5 in one piece and the welding strip 570 is formed. The width W of the welding strip 570 in the longitudinal direction H of the main body pipe 51 is equal to the length L1 of the connection sheet 521, and of course, both are equal to the length of the connection region in the longitudinal direction H.

The structure of luer tee joint that current peritoneal dialysis adopted is because need with outer joint many times plug threaded connection of peritoneal dialysis, in order to avoid the butt joint to form wearing and tearing or avoid wearing and tearing seriously, consequently it adopts PVC and TPEE to constitute luer tee joint's two parts respectively, carries out many times with outer joint of peritoneal dialysis through the joint of TPEE material on the one hand, reduces wearing and tearing and leakage, improves the life of outer joint of peritoneal dialysis, and on the other hand carries out reliable connection with transmission catheter through the joint of PVC material. In addition, the luer tee joint with the split structure is mature in materials and manufacturing processes (such as industrial frequency welding and bonding), and further forms a certain degree of obstruction to the formation of improved processes.

As shown in fig. 11 to 17, compared with the above conventional design, in the present embodiment, the peritoneal dialysis tee 10 is of an integral structure, not of a split structure, and the peritoneal dialysis tee 10 having the dialysis luer 15, the liquid inlet 12 and the liquid outlet 11 is of an integral injection molding structure, so that split manufacturing and assembly are not needed, the assembly process is simplified, the manufacturing efficiency is improved, and the peritoneal dialysis tee 10 has no split connection part, and has higher structural strength.

In the prior art, the whole manufacturing and assembling time of the split structure PVC tee joint is about 1/7 seconds after the split structure PVC tee joint is inserted into the dialysis luer joint and then subjected to high-frequency welding, and the injection molding time of the peritoneal dialysis tee joint 10 adopting the structure of the embodiment is 4/15 seconds, so that the manufacturing efficiency can be greatly improved, the manufacturing cost is further saved, the manual assembling process can be reduced, and the manufacturing level of the process is improved.

In this embodiment, the material of the dialysis luer connector 15 is the same as that of the liquid inlet connector 12 and the liquid outlet connector 11, and is non-PVC. Specifically, the material of the dialysis luer 15 includes a base material and an elastic material; the weight percentage of the matrix material and the elastic material is above 50%; the matrix material is PP or PE.

The materials of the peritoneal dialysis tee 10 of the present embodiment include a base material and an elastic material; the weight percentage of the matrix material and the elastic material is above 50%; the matrix material is PP or PE or TPEE. Further, the weight percentage of the matrix material and the elastic material may be between 50% and 97%. The elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS. Thus, the main materials of the three-way joint 10 and the transmission pipe for tectorial membrane dialysis in this embodiment are matrix material and elastic material, and the two materials are similar after lamination to form a lamination sealing structure, which is not only convenient for the connection of the two materials, but also can avoid connection leakage.

Compared with the traditional PVC material, the peritoneal dialysis tee joint 10 or the transmission catheter material is more environment-friendly, and the PVC material pipe can generate toxic substances due to incineration, so that the degradation treatment can only be carried out by adopting a landfill method at present. However, the peritoneal dialysis tee 10 or the transfer catheter according to the embodiment of the present application can be incinerated, and harmful substances are not easily generated during the incineration process.

In the three-way peritoneal dialysis adapter 10, at least the dialysis luer 15 is made of a transparent material or a translucent material. Considering that the material of the whole peritoneal dialysis tee joint 10 is wholly consistent, the whole peritoneal dialysis tee joint 10 is made of transparent or semitransparent materials (similar to ground glass effect), and then the flowing condition of liquid can be observed through the peritoneal dialysis tee joint 10 in the peritoneal dialysis process, so that the operation of corresponding peritoneal dialysis external connection pipe is facilitated, the probability of misoperation is reduced, and the use experience is improved.

In this embodiment, the three-way peritoneal dialysis adapter 10 is a unitary structure that includes a main body tube section 13 extending in a longitudinal direction (length direction F1). The main pipe section 13 is a main body part of the peritoneal dialysis tee joint 10, and the dialysis luer joint 15, the liquid inlet joint 12 and the liquid outlet joint 11 are arranged on the main pipe section 13 to form the peritoneal dialysis tee joint 10 with a tee structure. The main pipe section 13, the dialysis luer connector 15, the liquid inlet connector 12 and the liquid outlet connector 11 are of an injection molding integrated structure.

As shown in fig. 11, 12, 13, and 14, a dialysis luer 15 is provided at one end of the main body tube section 13 in the longitudinal direction F1 thereof; the liquid inlet joint 12 and the liquid outlet joint 11 are arranged at the other end of the main pipe section 13. An end flange plate 16 is arranged at one end of the main pipe section 13, and the dialysis luer connector 15 is positioned at one side of the end flange plate 16 away from the main pipe section 13. The side wall of the main pipe section 13 is provided with a wing plate 14. The wing plates 14 are distributed on two sides of the main pipe section 13, so that the force applied by a user and the external abdominal tube can be assembled by relative rotation. The included angle between the liquid inlet joint 12 and the liquid outlet joint 11 is an acute angle or a right angle. Preferably, the included angle between the liquid inlet joint 12 and the liquid outlet joint 11 is set at an acute angle.

In this embodiment, the liquid outlet connector 11 is coaxially disposed with the main body pipe section 13, and is located on an extension line of the main body pipe section 13, and can form a same straight pipe section with the main body pipe section 13, similarly, the dialysis luer connector 15 is located at the other end of the main body pipe section 13, and the dialysis luer connector 15 and the liquid outlet connector 11 are respectively located at two ends of the main body pipe section 13, so as to form a coaxial straight pipe structure.

As shown in fig. 11-14, the dialysis luer fitting 15 includes an outer sleeve 150 and an inner fitting 17 coaxially located within the outer sleeve 150. The outer sleeve 150 and the inner fitting 17 are also of injection molded integrally formed construction and form a luer fitting construction. The dialysis luer fitting 15 is a female luer fitting, and is connected with a male luer fitting of an abdominal penetration extension tube in a matching manner.

Specifically, the outer sleeve 150 has an outer diameter larger than the outer diameter of the main pipe section 13, and includes a light wall section 151 and a connecting section 152 located on a side of the light wall section 151 near the main pipe section 13. The inner wall of the optical wall section 151 is a smooth wall surface, which is convenient for the male luer connector of the external abdominal tube to be inserted, and the connecting section 152 is positioned at the inner side of the optical wall section 151, the inner wall of the connecting section 152 is provided with threads, and the inner connector 17 is matched to form a luer structure, so that the luer structure is in threaded connection with the male luer connector of the external abdominal tube.

In order to facilitate connection with the outer tube, avoid the abrasion and damage to the outer tube caused by multiple connection, the outer tube sleeve 150 mainly comprises a base material and an elastic material, and has a certain elastic modulus. To accommodate connection of the outer abdominal tube, the outer tube 150 has a wall thickness of 0.1-3 mm and a hardness of 30-60 Shore D. The outer tube sleeve 150 with the hardness and the tube wall thickness can reduce the abrasion to the peritoneal dialysis outer tube and ensure the service life of the peritoneal dialysis outer tube.

Optionally, to improve sealing performance and avoid leakage, a sealing step 155 is further disposed in the outer sleeve 150. The sealing step 155 is located on the inner wall of the light wall section 151. In this way, the inner wall of the outer sleeve 150 forms a stepped bore configuration, and is abutted by the sealing step 155 with the corresponding structure of the male luer of the peritoneal dialysis extension tube to form a snug seal. Of course, the end of the connecting section 152 is also formed with an end step, the sealing step 155 being outside the end step (the side remote from the tapping fitting 11). The inner diameter of the connecting section 152 relative to the optical wall section 151 is reduced to a certain extent, so that the inner threads are formed on the connecting section 152 to avoid reducing the wall thickness of the connection and ensure the connection strength.

In this embodiment, the pipe end of the first transmission pipe 3 is non-adhesive sleeved outside the liquid inlet joint 12. The pipe end of the second transmission pipe 4 is sleeved outside the liquid outlet joint 11 in a non-adhesive fit mode. The ends of the transmission pipes are butt-jointed and extruded by cold pushing (in a non-heating state, for example, in a room temperature state), so that the ends of the transmission pipes are expanded, and then the liquid inlet joint 12 and the liquid outlet joint 11 are respectively inserted into the corresponding first transmission pipe 3 and the second transmission pipe 4. The pipe ends of the first transmission pipe 3 and the second transmission pipe 4 are clung to the outer walls of the liquid inlet joint 12 and the liquid outlet joint 11 sleeved inside by virtue of the elastic retraction performance of the first transmission pipe and the second transmission pipe, so that the sealing is formed.

The first transmission pipe 3, the second transmission pipe 4 of this embodiment are connected with the liquid inlet joint 12 and the liquid outlet joint 11, do not need to be heated to soften and then be inserted in a butt joint way, and then the first transmission pipe 3, the second transmission pipe 4, the liquid inlet joint 12 and the liquid outlet joint 11 of this embodiment are in non-adhesive bonding, and the heated pipe ends and the joints can form certain bonding after bonding. The fixed connection mode of non-adhesive bonding can adopt machinery to push the pipe end cold into the outside of the joint, and manual pushing is not needed, so that the manufacturing efficiency is improved.

Wherein, the pipe ends of the first transmission pipe 3 and the second transmission pipe 4 are sleeved on the liquid inlet joint 12 and the liquid outlet joint 11 by deformation; the deformation mainly comprises elastic deformation. Of course, the ends of the first transfer tube 3 and the second transfer tube 4 may be deformed plastically to some extent, which is not limited in this regard. After the first transfer tube 3 or the second transfer tube 4 is pulled out from the liquid inlet joint 12 or the liquid outlet joint 11, the tube ends of the first transfer tube 3 or the second transfer tube 4 can recover the shape to a certain extent.

As shown in fig. 14 to 17, in order to enhance the connection strength between the first and second transfer pipes 3 and 4 and the corresponding liquid inlet and outlet joints 12 and 11, at least one of the liquid inlet and outlet joints 12 and 11 is provided with at least one connection step 113 facing the main pipe section 13. The connection step 113 is fixedly sleeved inside the transmission pipe. The width of the connection step 113 is between 1 and 20 mm.

By the connection step 113, a hooking structure can be formed to the pipe end of the transfer pipe. The transmission pipe is contracted and reduced under the condition of elastic recovery of the transmission pipe through the connection step 113, and then the transmission pipe is hooked by the connection step 113, so that the transmission pipe is stopped, and as shown in fig. 15, the stability of connection is ensured by forming a physical hooking structure on the basis of tight connection of the transmission pipe and the transmission pipe. The outer edges of the ends of the liquid inlet joint 12 and the liquid outlet joint 11 are provided with chamfer ends 119 so as to reduce the outer diameter of the ends to be smaller than the inner diameter of the transmission pipes (the first transmission pipe 3 and the second transmission pipe 4), and the diameter of the port of the chamfer ends 119 is smaller than the inner diameter of the transmission pipes (the first transmission pipe 3 and the second transmission pipe 4). Thus, when the extrusion is pushed in, the ends of the liquid inlet joint 12 and the liquid outlet joint 11 are conveniently inserted into the pipe end of the transmission pipe, and the pipe end of the transmission pipe is gradually pushed in to be expanded. Of course, the outermost (lowermost when facing fig. 4) expansion section 111 may be tapered to facilitate the expansion of the tube end of the transfer tube by squeezing in.

Specifically, at least one of the liquid inlet joint 12 and the liquid outlet joint 11 is provided with a reducing section 112 and an expansion section 111. The annular interface of the reduced diameter section 112 and the expanded section 111 forms the connecting step 113. The reduced diameter section 112 is located on the side of the expansion section 111 adjacent to the main pipe section 13. The outer diameter of the diameter-reduced section 112 is larger than the inner diameter of any one of the first transfer pipe 3 and the second transfer pipe 4. Furthermore, when the first portion 36 corresponding to the reduced diameter section 112 is retracted, the pipe end of the transmission pipe is still in a state of being expanded by the reduced diameter section 112, and is tightly attached (non-adhesive attached) to the outer wall of the reduced diameter section 112, so that the connection strength is improved and the sealing performance is ensured.

As shown in fig. 15, the pipe end of the transmission pipe mainly includes a first portion 36 sleeved outside the reduced diameter section 112 and a second portion 35 sleeved outside the expansion section 111, wherein the inner diameter of the first portion 36 is larger than the inner diameter of the transmission pipe (non-pipe end portion), that is, the first portion 36 is still in a state of being enlarged and expanded by the reduced diameter section 112, so as to ensure that the first portion and the second portion are tightly sealed. The second portion 35 is sleeved outside the expansion section and is tightly attached to the outer wall of the expansion section.

In order to form an effective physical hooking structure, the length of the diameter-reducing section 112 is more than one third of the inner diameter of the first transmission pipe 3 or the second transmission pipe 4, that is, L is equal to or greater than D/3, L is the length of the diameter-reducing section 112, and D is the inner diameter of the first transmission pipe 3 or the second transmission pipe 4. For example, when the inner diameter of the first transfer tube 3 is 6m, the length of the reduced diameter section 112 is 2mm or more.

The expansion section 111 is of cylindrical or conical configuration. As shown in fig. 16 and 17, each of the liquid inlet joint 12 and the liquid outlet joint 11 may have a plurality of connection steps 113 to form a multi-stage physical hooking structure instead of a chemical connection manner, so as to ensure the connection strength between the first and second transmission pipes 3 and 4 and the corresponding liquid inlet joints 12 and 11. Accordingly, the expansion section 111 (111 a, 111 b), the contraction section 112 (112 a, 112 b), and the connection step 113 (113 a, 113 b) may be provided in plurality. Preferably, the expansion section 111 is provided with 1, 2, or 3, and the contraction section 112 is provided with 1, 2, or 3.

Of course, the structure of the first connecting end 501 and the structure of the liquid inlet joint 12 or the liquid outlet joint 11 in the above embodiment can be combined by reference; the connection mode of the bag end connector 5 and the second transmission pipe 4 can be mutually referred to and combined with the connection mode of the liquid inlet connector 12 or the liquid outlet connector 11 and the first transmission pipe 3 or the second transmission pipe 4, the description of the diameter reducing part 56 and the diameter reducing section 112, and the description of the expansion part 55 and the expansion section 111 can be mutually referred to and combined, and the application is not repeated.

Any numerical value recited herein includes all values of the lower and upper values that increment by one unit from the lower value to the upper value, as long as there is a spacing of at least two units between any lower value and any higher value. For example, if it is stated that the number of components or the value of a process variable (e.g., temperature, pressure, time, etc.) is from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, then the purpose is to explicitly list such values as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. in this specification as well. For values less than 1, one unit is suitably considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be explicitly recited in this description, and all possible combinations of values recited between the lowest value and the highest value are believed to be explicitly stated in the description in a similar manner.

Unless otherwise indicated, all ranges include endpoints and all numbers between endpoints. "about" or "approximately" as used with a range is applicable to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30," including at least the indicated endpoints.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. A single use peritoneal dialysis drainage bag comprising:

the second transmission pipe is fixedly communicated with the liquid outlet joint and the bag end joint.

2. The single use peritoneal dialysis drainage bag of claim 1, wherein the planar sheet comprises connecting sheets symmetrically distributed on both sides of the body tube; the thickness of the connecting sheet is 0.01-1.5 mm, and the length along the radial direction is 0.5-10 mm; the length of the connecting sheet along the length direction of the body pipe is 1 mm-10 mm.

3. The single use peritoneal dialysis drainage bag of claim 2, wherein the bag connection end has at least one weld strip for welding the bag port membrane layer opposite; the number of the plane sheets is equal to that of the welding strip parts, and the plane sheets are aligned one by one in the width direction of the first bag body.

4. The single use peritoneal dialysis drainage bag of claim 3, wherein said bag end fitting is a non-PVC material; the bag connecting end and the bag end connector are welded and formed at one time, and the welding strip part is formed.

5. The single use peritoneal dialysis drainage bag of claim 2, wherein said body tube is provided with two or more of said planar sheets in its length direction; the shape of the connecting thin sheets of the two plane sheets is the same; the interval distance between two adjacent plane sheets is 3-15 mm.

6. The single use peritoneal dialysis drainage bag of claim 2, wherein said connecting tab has an inner end connected to said body tube and an outer end remote from said body tube; the thickness of the connecting sheet gradually decreases from the inner end to the outer end.

7. The single use peritoneal dialysis drainage bag of claim 1, wherein the planar sheet has a blend with the bag port membrane layer.

8. The single use peritoneal dialysis drainage bag of claim 1, wherein the bag end connector has a first connection end connected to a second transfer tube and a second connection end connected to the first bag body; the first connecting end is provided with at least one elevation step facing the second connecting end; the elevation step is fixedly sleeved in the second transmission pipe.

9. The single use peritoneal dialysis drainage bag of claim 8, wherein the first connection end is provided with a reduced diameter portion and an expanded portion; the diameter-reducing part is positioned at one side of the expansion part, which is close to the second connecting end, and the annular interface of the diameter-reducing part and the expansion part forms the elevation step.

10. The single use peritoneal dialysis drainage bag of claim 9, wherein the reduced diameter portion has a length of one third or more of the inner diameter of the second transfer tube.

11. The single use peritoneal dialysis drainage bag of claim 1, wherein the ends of the first and second transfer tubes are fixedly sleeved outside the liquid inlet and outlet connectors by deformation, and the other end of the second transfer tube is fixedly sleeved outside the bag end connector by deformation; the deformation includes elastic deformation.

12. The single use peritoneal dialysis drainage bag of claim 1, wherein the first transfer tube has a tube end non-adhesive fit over the fluid inlet connector and the second transfer tube has a tube end non-adhesive fit over the fluid outlet connector; the pipe end of the second transmission pipe is sleeved outside the bag end connector in a non-adhesive fit mode.

13. The single use peritoneal dialysis drainage bag of claim 1, wherein the tube end of the first transfer tube is pushed out of the fluid inlet fitting by cold pushing; the pipe end of the second transmission pipe is sleeved outside the liquid outlet joint through cold pushing; the pipe end of the second transmission pipe is sleeved outside the bag end connector through cold pushing.

14. The single use peritoneal dialysis drainage bag of claim 1, wherein the material of the bag end fitting comprises a matrix material and an elastic material; the weight percentage of the matrix material and the elastic material is above 50%; the matrix material is PP or PE; the elastic material is one or more of SEBS, EVA, POE, SBS, EPR, TPEE, EPDM and SIS.