Dialyzer shell with tree-shaped protrusions

Abstract

The utility model belongs to the technical field of blood purification. The dialyzer shell with the tree-shaped protrusions comprises a first barrel, a second barrel, a flow guide ring and the tree-shaped protrusions, the first barrel is arranged at the two ends of the second barrel, the diameter of the first barrel is larger than that of the second barrel, the flow guide ring is arranged on the inner side of the first barrel, one end of the flow guide ring is connected with the inner wall of the second barrel, and the tree-shaped protrusions are arranged at the other end of the flow guide ring. According to the dialyzer shell, the tree-shaped protrusions are arranged at one end of the flow guide ring, the length of the flow guide ring is prolonged through the tree-shaped protrusion structure, hollow fiber membranes at the two ends can be effectively gathered together, and the undesirable phenomenon that the membrane filaments cannot be blooded due to the fact that the membrane filaments are dispersed and deviated from each other is reduced. In addition, the first protrusion, the second protrusion, the third protrusion and the fourth protrusion arranged on the tree-shaped protrusion structure are arranged in a leaf shape, a certain supporting effect is achieved on the binding agent, the extrusion force of the end cover is resisted, and the risk that the binding agent is peeled off is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of blood purification, in particular to a dialyzer shell with tree-like protrusions. Background Art

[0002] Dialyzer: The dialyzer mainly uses the principle of semi-permeable membrane to introduce the patient's blood and dialysate into the dialyzer at the same time. The two flow in opposite directions on both sides of the dialysis membrane. With the help of the solute gradient and osmotic gradient on both sides of the membrane, toxins and excess water retained in the body are removed, while replenishing the substances needed by the body.

[0003] The dialysis membrane is one of the most critical components in the dialyzer, playing a core filtration role during the hemodialysis process. Dialysis membranes are typically made of synthetic polymer materials such as polysulfone (PS), polyethersulfone (PES), polyacrylonitrile (PAN), and polyamide (PA). The primary function of a dialysis membrane is to purify the blood by utilizing the solute concentration difference on both sides of the polymer hollow fiber membrane. Through osmosis, diffusion, and ultrafiltration, the membrane allows small waste molecules in the blood (such as urea, creatinine, and excess electrolytes) to pass through, while preventing larger molecules (such as blood cells and proteins) from passing through.

[0004] PP Housing: The dialyzer's PP housing is the outer shell of the dialyzer, made of polypropylene (PP) and typically used to encase and protect the dialyzer's internal structures and components. This housing is designed to provide corrosion resistance, chemical resistance, and high temperature resistance to ensure the dialyzer's safe and reliable operation during use.

[0005] PP, short for polypropylene, is a thermoplastic polymer commonly used in the manufacture of various plastic products. Its low density, excellent heat and chemical resistance, and electrical insulation properties make it widely used in packaging materials, fibers, medical devices, automotive parts, and other fields.

[0006] A hemodialyzer primarily consists of a housing and a polymer hollow fiber membrane installed within it. Since adhesives are used to bond the hollow fiber membranes to the housing at both ends of the dialyzer, the bonding strength between the adhesive and the housing is crucial, impacting the safety and stability of the dialyzer during use. In existing technology, dialysate inlets and outlets are required at both ends of the dialysate tube. The inner walls at both ends have a larger diameter than the inner wall in the middle. The entire bundle of hollow fiber membranes is installed within the inner wall of the dialysate tube, and the ends of the inner wall are bonded to the hollow fiber membranes with adhesive. The increased diameter can easily cause the membrane fibers at both ends to disperse and deviate from each other, leading to adverse events such as membrane fiber failure.

[0007] In addition, the adhesives at both ends are bonded to the inner wall and are squeezed by the end caps, which makes them easy to peel off. In the existing technology, a circle of bosses is set to offset the squeezing force of the end caps, but due to the excessive squeezing force, peeling still occurs, resulting in clinical adverse events such as bleeding. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a dialyzer housing with tree-like protrusions which can gather the two ends of the hollow fiber membrane and effectively reduce the undesirable phenomenon of membrane filaments not passing blood.

[0009] The technical solution adopted by the utility model to solve its technical problems is: the dialyzer shell with tree-like protrusions includes a first cylinder, a second cylinder, a guide ring and tree-like protrusions, the first cylinder is arranged at both ends of the second cylinder, the diameter of the first cylinder is larger than the diameter of the second cylinder, the guide ring is arranged on the inner side of the first cylinder, one end of the guide ring is connected to the inner wall of the second cylinder, and a plurality of tree-like protrusions are arranged on the other end.

[0010] Preferably, the tree-like protrusions include a protrusion body and a plurality of branch protrusions arranged on both sides of the protrusion body. The protrusion body is connected to the guide ring, and the branch protrusions extend toward one side of the adjacent protrusion body.

[0011] Preferably, the branch protrusions of adjacent tree-like protrusions are arranged in a staggered manner.

[0012] Preferably, the supporting protrusion includes a first protrusion, a second protrusion, a third protrusion and a fourth protrusion, the first protrusion and the third protrusion are arranged on one side of the protrusion body, the first protrusion is close to the port of the first cylinder, and the third protrusion is close to the guide ring, the second protrusion and the fourth protrusion are arranged on the other side of the protrusion body, the second protrusion is close to the port of the first cylinder, and the fourth protrusion is close to the guide ring.

[0013] The lengths of the first protrusion, the second protrusion, the third protrusion and the fourth protrusion gradually decrease.

[0014] Preferably, a fifth protrusion is further provided at one end of the protrusion body away from the guide ring. The fifth protrusion is axially arranged along the first cylinder. The first and third protrusions are arranged on one side of the fifth protrusion, and the second and fourth protrusions are arranged on the other side of the fifth protrusion.

[0015] Preferably, it also includes a dialysate connector, which is arranged on the outside of the first cylinder. The guide ring has a long horizontal length on the side close to the dialysate connector and a short horizontal length on the side away from the dialysate connector. The raised body has a short horizontal length on the side close to the dialysate connector and a long horizontal length on the side away from the dialysate connector. A dialysate infiltration port is arranged on the raised body.

[0016] Preferably, it also includes a positioning boss, which is arranged around the outer side of the first cylinder. The positioning boss is arranged on the side of the dialysate connector close to the port of the first cylinder. Multiple reinforcing ribs are arranged along the axial direction of the dialysate connector between the dialysate connector and the first cylinder, and one of the reinforcing ribs is connected to the positioning boss.

[0017] Preferably, the reinforcing rib is narrow at the top and wide at the bottom.

[0018] Preferably, it further comprises a bonding boss, which is arranged on a side of the first cylinder close to the port.

[0019] Compared with the existing technology, the beneficial effects of this technical solution are:

[0020] The utility model adopts a dialyzer shell with a tree-like protrusion at one end of the guide ring. The tree-like protrusion structure extends the length of the guide ring and can effectively gather the hollow fiber membranes at both ends, reducing the adverse phenomenon of membrane filaments not passing blood due to dispersion and deviation of the membrane filaments.

[0021] In addition, the first protrusion, the second protrusion, the third protrusion and the fourth protrusion arranged on the tree-like protrusion structure are arranged in a leaf-like shape, which plays a certain supporting role for the adhesive, resists the squeezing force of the end cover, and reduces the risk of adhesive peeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the dialyzer housing of the present utility model.

[0023] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0024] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0025] Figure 4 This is a schematic structural diagram of the tree-like protrusions of the present invention.

[0026] Figure 5 Schematic diagram of the dialysate flow path of a dialyzer housing without tree-like protrusions.

[0027] Figure 6 Schematic diagram of the dialysate flow trajectory of a dialyzer housing with tree-like protrusions.

[0028] Among them: 1, first cylinder 2, second cylinder 3, dialysate connector 4, guide ring 5, tree-like protrusion 501, first protrusion 502, fifth protrusion 503, second protrusion 504, third protrusion 505, fourth protrusion 506, protrusion body 6, groove 7, bonding boss 8, reinforcing rib 9, positioning boss. DETAILED DESCRIPTION

[0029] Figures 1 to 6 This is the best embodiment of the present invention, Figures 1 to 6 The utility model is further described.

[0030] Reference Figures 1 and 2 The dialyzer housing includes a first cylinder 1, a second cylinder 2, a dialysate connector 3, a guide ring 4, tree-like protrusions 5, and a positioning boss 9. The two first cylinders 1 are arranged at both ends of the second cylinder 2. The diameter of the first cylinder 1 is larger than that of the second cylinder 2. The guide ring 4 is arranged on the inner side of the first cylinder 1. One end of the guide ring 4 is connected to the inner wall of the second cylinder 2, and the other end is provided with a plurality of tree-like protrusions 5. The two dialysate connectors 3 are arranged perpendicular to the axis of the first cylinder 1 on the outside of the first cylinder 1 and are divided into dialysate inlet and outlet according to needs. The positioning boss 9 is arranged around the outer side of the first cylinder 1. The positioning boss 9 is arranged on the side of the dialysate connector 3 close to the port of the first cylinder 1 and is adjacent to the dialysate connector 3. The positioning boss 9 is used for positioning during ultrasonic welding and end face cutting.

[0031] A thread is provided between the positioning boss 9 and the end of the first cylinder 1 for connecting the sealing systems at both ends.

[0032] The dialysate connector 3 is a two-cylindrical structure protruding from the first cylinder 1. It is extremely susceptible to impact during transportation and use, and may break at the connection between the dialysate connector 3 and the first cylinder 1. The utility model provides trapezoidal reinforcing ribs 8 that are narrow at the top and wide at the bottom around the dialysate connector 3 to increase the strength of the connection between the dialysate connector 3 and the first cylinder 1. In this embodiment, there are four reinforcing ribs 8, one of which is connected to the positioning boss 9. Compared with traditional strip-shaped reinforcing ribs, the trapezoidal reinforcing ribs 8 have a smaller width, and the wide side of the lower side maximizes the contact area with the first cylinder 1, thereby enhancing the strength of the dialysate liquid port 3, preventing breakage, and making the dialyzer housing look more beautiful.

[0033] Reference Figures 3 and 4 A bonding boss 7 is also provided on the side of the first barrel 1 near the port. The inner diameter of the bonding boss 7 is larger than the inner diameter of the first barrel 1. The inner wall of the second barrel 2 extends to the inside of the first barrel 1 to form a guide ring 4. A plurality of tree-like protrusions 5 are provided around the end of the guide ring 4. The tree-like protrusions 5 include a protrusion body 506 and multiple branch protrusions provided on both sides of the protrusion body 506. The protrusion body 506 is connected to the guide ring 4. The branch protrusions extend toward the side of the adjacent protrusion body 506. The branch protrusions of adjacent tree-like protrusions 5 are staggered.

[0034] The supporting protrusion includes a first protrusion 501, a second protrusion 503, a third protrusion 504 and a fourth protrusion 505. The first protrusion 501 and the third protrusion 504 are arranged on one side of the protrusion body 506, the first protrusion 501 is close to the port of the first cylinder 1, and the third protrusion 504 is close to the guide ring 4. The second protrusion 503 and the fourth protrusion 505 are arranged on the other side of the protrusion body 506, the second protrusion 503 is close to the port of the first cylinder 1, and the fourth protrusion 505 is close to the guide ring 4.

[0035] A fifth protrusion 502 is also provided at the end of the protrusion body 506 away from the guide ring 4. The fifth protrusion 502 is arranged axially along the first cylinder 1. The first protrusion 501 and the third protrusion 504 are arranged on one side of the fifth protrusion 502. The first protrusion 501 is close to the port of the first cylinder 1, and the third protrusion 504 is close to the guide ring 4. The second protrusion 503 and the fourth protrusion 505 are arranged on the other side of the fifth protrusion 502. The second protrusion 503 is close to the port of the first cylinder 1, and the fourth protrusion 505 is close to the guide ring 4. The first protrusion 501, the fifth protrusion 502, the second protrusion 503 and the fourth protrusion 505 are arranged in a leaf shape, and the outward expansion length gradually decreases.

[0036] The entire bundle of hollow fiber membranes is installed within the inner wall of the dialysate tube, with both ends of the inner wall bonded to the hollow fiber membranes via adhesive. Due to the increased inner diameter of the first cylindrical body 1, direct bonding to the hollow fiber membranes can easily cause the membrane filaments to disperse and deviate from one another, leading to adverse events such as membrane filament blood flow failure. The tree-like protrusions 5 extend horizontally from the guide ring 4, effectively gathering the hollow fiber membranes at both ends. This allows the hollow fiber membranes to bind to the adhesive in a gathered state, creating a tighter bond and preventing the membrane filaments from dispersing and separating from one another, thereby preventing adverse events such as membrane filament blood flow failure.

[0037] Furthermore, to prevent lateral leakage of dialysate, the present invention provides a bonding boss 7, the side of which has been surface-treated to provide a more secure bond between the adhesive and the wall of the first barrel 1. The fifth protrusion 502 extends into the inner cavity of the bonding boss 7. The protrusions on the tree-like protrusions 5 are arranged in a leaf-like pattern, providing support for the adhesive within the bonding boss 7. This offsets the squeezing force of the end cap on the adhesive, strengthens the adhesive's adhesion, and prevents the adhesive from peeling off the inner wall of the bonding boss 7.

[0038] The guide ring 4 is horizontally longer on the side closest to the dialysate connector 3 and shorter on the side further away from the dialysate connector 3. The raised body 506 is horizontally shorter on the side closest to the dialysate connector 3 and longer on the side further away from the dialysate connector 3. The raised body 506 is provided with a dialysate inlet. In this embodiment, grooves 6 are provided between the raised bodies 506. The length of the grooves 6 gradually increases from the side closest to the dialysate connector 3 to the side further away from the dialysate connector 3. The longest groove 6 does not pass through the guide ring 4.

[0039] A liquid storage chamber is formed between the guide ring 4 and the dialysate connector 3. The dialysate enters the liquid storage chamber from the dialysate connector 3. Since the port of the first cylinder 1 is filled with adhesive, the dialysate can only flow from top to bottom through the groove 6 and then flow horizontally along the hollow fiber membrane.

[0040] Reference Figure 5 The dialysate flow path on the side close to the dialysate connector 3 is shorter and the pressure is lower, while the dialysate flow path on the side far from the dialysate connector 3 is longer and the pressure is higher. Since the liquid first flows to the place with lower pressure, the dialysate on the side far from the dialysate connector 3 will flow slowly or not flow. This will reduce the diffusion and convection between the blood and the dialysate, which is not conducive to the full utilization of the dialysate. Figure 5 Most of the dialysate shown in the figure flows outside the hollow fiber membrane, and a small amount enters the inside of the hollow fiber membrane.

[0041] Reference Figure 6 The utility model provides a tree-shaped diagram 5 at the upper end of the guide ring 4. The length of the groove 6 provided on the raised body 506 gradually increases from the side close to the dialysate connector 3 to the side away from the dialysate connector 3, and the length of the guide ring 4 gradually decreases, which can make the time for the dialysate to reach the outer wall of the membrane wire from the distal end of the dialysate connector 3 and the distance from the proximal end to reach the outer wall of the membrane wire similar, and the time is equal. The dialysate can be evenly diffused into the hollow fiber membrane, thereby enhancing its dialysis effect.

[0042] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A dialyzer housing having tree-like protrusions, characterized in that: The invention comprises a first cylinder (1), a second cylinder (2), a guide ring (4) and tree-like protrusions (5), wherein the first cylinder (1) is arranged at both ends of the second cylinder (2), the diameter of the first cylinder (1) is larger than the diameter of the second cylinder (2), the guide ring (4) is arranged on the inner side of the first cylinder (1), one end of the guide ring (4) is connected to the inner wall of the second cylinder (2), and the other end is provided with a plurality of tree-like protrusions (5).

2. The dialyzer housing with tree-like protrusions according to claim 1, characterized in that: The tree-like protrusion (5) comprises a protrusion body (506) and a plurality of branch protrusions arranged on both sides of the protrusion body (506); the protrusion body (506) is connected to the guide ring (4); and the branch protrusions extend toward one side of the adjacent protrusion body (506).

3. The dialyzer housing with tree-like protrusions according to claim 2, characterized in that: The branch protrusions of the adjacent tree-like protrusions (5) are arranged in a staggered manner.

4. The dialyzer housing with tree-like protrusions according to claim 2 or 3, characterized in that: The supporting protrusion includes a first protrusion (501), a second protrusion (503), a third protrusion (504) and a fourth protrusion (505). The first protrusion (501) and the third protrusion (504) are arranged on one side of the protrusion body (506), the first protrusion (501) is close to the port of the first cylinder (1), and the third protrusion (504) is close to the guide ring (4). The second protrusion (503) and the fourth protrusion (505) are arranged on the other side of the protrusion body (506), the second protrusion (503) is close to the port of the first cylinder (1), and the fourth protrusion (505) is close to the guide ring (4).

5. The dialyzer housing with tree-like protrusions according to claim 4, characterized in that: The lengths of the first protrusion (501), the second protrusion (503), the third protrusion (504) and the fourth protrusion (505) gradually decrease.

6. The dialyzer housing with tree-like protrusions according to claim 4, characterized in that: The end of the protrusion body (506) away from the guide ring (4) is further provided with a fifth protrusion (502), and the fifth protrusion (502) is arranged axially along the first cylinder (1).

7. The dialyzer housing with tree-like protrusions according to claim 1, characterized in that: The device further comprises a dialysate connector (3), which is arranged on the outside of the first cylinder (1); the guide ring (4) has a long horizontal length on the side close to the dialysate connector (3) and a short horizontal length on the side away from the dialysate connector (3); the raised body (506) has a short horizontal length on the side close to the dialysate connector (3) and a long horizontal length on the side away from the dialysate connector (3); and a dialysate infiltration port is provided on the raised body (506).

8. The dialyzer housing with tree-like protrusions according to claim 7, characterized in that: The invention also includes a positioning boss (9), which is arranged along the outer side of the first cylinder (1). The positioning boss (9) is arranged on the side of the dialysate connector (3) close to the end of the first cylinder (1). A plurality of reinforcing ribs (8) are arranged along the axial direction of the dialysate connector (3) between the dialysate connector (3) and the first cylinder (1), and one of the reinforcing ribs (8) is connected to the positioning boss (9).

9. The dialyzer housing with tree-like protrusions according to claim 8, characterized in that: The reinforcing rib (8) is narrow at the top and wide at the bottom.

10. The dialyzer housing with tree-like protrusions according to claim 1, characterized in that: It also includes a bonding boss (7), which is arranged on a side of the first cylinder (1) close to the port.

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