Hollow fiber hemodialyzer for blood purification
By introducing the shell, end cap and limiting assembly into the hemodialyzer, the torsional compression problem at the connection between the arterial vessel and the dialyzer is solved, and the flexible adjustment of the transfusion angle and sealing guarantee are achieved, which improves the stability of hemodialysis.
Patent Information
- Application Number
- CN202422058621.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-08-23
AI Technical Summary
During the use of existing hemodialysers, the connection between the arterial vessels and the vascular vessels and the dialysers is prone to failure of sealing due to twisting and squeezing, affecting the treatment effect.
The design includes a housing, an end cap, a hollow fiber membrane, a first connecting assembly, a limiting assembly and a third connecting assembly are adopted. The threaded connection and limiting structure ensure that the angle of the blood transfusion tube is adjustable and sealed well, and avoids torsional squeezing.
It realizes flexible adjustment of the transfusion angle, avoids torsional squeezing, ensures sealing, thereby improving the stability and effect of hemodialysis.
Smart Images
Figure CN223263256U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of dialysis equipment, and in particular relates to a hollow fiber hemodialyzer for blood purification. Background Art
[0002] Hemodialysis is the main means of renal replacement therapy and the main treatment method for patients with chronic renal failure. It is commonly known as dialysis and is a type of blood purification technology. The hemodialyzer, also known as the dialyzer, is a pipe and container for solute exchange between blood and dialysate, and is a key part of hemodialysis.
[0003] Existing hemodialyzers have many problems or defects: after the arterial tube and venous tube are fixed to the dialyzer respectively, the connection between the arterial tube and the dialyzer and the connection between the venous tube and the dialyzer will be twisted when the patient turns over or the nurse installs the tube, which can easily cause twisting and squeezing of the tube.
[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content
[0005] In view of the problems in the related art, the present invention proposes a hollow fiber hemodialyzer for blood purification to overcome the above technical problems existing in the existing related art.
[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
[0007] The utility model is a hollow fiber hemodialyzer for blood purification, comprising a shell, an end cap being threadedly connected to the outer surface of the shell, a hollow fiber membrane being fixedly connected to the interior of the shell, a first connecting component being arranged inside the end cap, a blood transfusion tube being arranged on the outer surface of the first connecting component, a second connecting component being arranged between the first connecting component and the blood transfusion tube, a limiting component being arranged between the first connecting component and the shell, a third connecting component being fixedly connected to the outer surface of the shell, the second connecting component being used to fix the first connecting component and the blood transfusion tube, and the limiting component being used to limit the moving distance of the first connecting component within the end cap.
[0008] Furthermore, the first connecting assembly includes a left spiral tube, which is threadedly connected to the end cover, the end of the left spiral tube is fixedly connected to the middle tube, the end of the middle tube is fixedly connected to the right spiral tube, and the right spiral tube is threadedly connected to the blood transfer tube.
[0009] Furthermore, the second connecting assembly includes a fixed ring, which is fixedly connected to the blood transfer tube, and an elastic hook is fixedly connected to the outer surface of the fixed ring. The fixed ring is connected to a movable ring through the elastic hook, and the movable ring is slidably connected to the intermediate tube. The outer surface of the intermediate tube is fixedly connected to a first limiting ring.
[0010] Furthermore, the limiting assembly includes a second limiting ring, which is fixedly connected to the intermediate tube and located inside the end cover. A sliding groove is provided inside the end cover, and the second limiting ring is slidably connected inside the sliding groove.
[0011] Furthermore, there are two groups of the third connecting components, and the third connecting components include dialysate tubes, which are fixedly connected to the shell, the dialysate tubes and the shell are interconnected, and the ends of the dialysate tubes are provided with end caps.
[0012] Furthermore, a sealing ring is fixedly connected to the interior of the end cover, and the sealing ring is located between the end cover and the shell.
[0013] Furthermore, the raw material of the hollow fiber membrane is polysulfone, the raw material of the shell and the end cap is polycarbonate, the shell and the hollow fiber membrane are fixedly connected by two-component polyurethane, the raw material of the sealing ring is silicone rubber, and the raw material of the end cap is polyethylene.
[0014] The utility model has the following beneficial effects:
[0015] 1. The present invention connects the first connecting component and the limiting component. The first connecting component and the blood transfusion tube are fixed by the second connecting component. When the blood transfusion tube is adjusted, the first connecting component is driven to rotate synchronously. When the first connecting component rotates, it also moves within the end cap. At this time, the limiting component can limit the first connecting component to prevent the first connecting component from separating from the end cap. The threaded connection between the first connecting component and the end cap can enhance the sealing performance. While ensuring the sealing performance, the angle of the blood transfusion tube can be adjusted, thereby avoiding twisting and squeezing.
[0016] 2. The utility model connects the middle tube with the second limiting plate, and the right screw tube on the middle tube is fixed to the blood transfusion tube. When adjusting the blood transfusion tube, the elastic hook drives the middle tube to rotate synchronously, and the left screw tube on the middle tube rotates and moves in the end cover. The second limiting ring on the middle tube moves synchronously in the slide groove. The slide groove can limit the movement distance of the second limiting ring and the middle tube to prevent the left screw tube from separating from the end cover. The threaded connection between the left screw tube and the end cover can ensure sealing. At the same time, the angle of the blood transfusion tube can be rotated and adjusted to avoid twisting and squeezing.
[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 This is a schematic diagram of the external outline structure of the utility model;
[0020] Figure 2 This is a schematic cross-sectional view of the utility model;
[0021] Figure 3 This is a schematic structural diagram of the second connecting component of the present invention;
[0022] Figure 4 For the utility model Figure 2 A schematic diagram of the structure at center A;
[0023] Figure 5 For the utility model Figure 2 A magnified schematic diagram of the structure at point B in the middle;
[0024] Figure 6 For the utility model Figure 2 Enlarged schematic diagram of the structure at point C in the middle.
[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0026] 1. Shell; 2. End cap; 3. Hollow fiber membrane; 4. First connecting assembly; 401. Left spiral tube; 402. Middle tube; 403. Right spiral tube; 5. Blood transfer tube; 6. Second connecting assembly; 601. Fixed ring; 602. Elastic hook; 603. Movable ring; 604. First limiting ring; 7. Limiting assembly; 701. Second limiting ring; 702. Slide; 8. Third connecting assembly; 801. Dialysis fluid tube; 802. End cap; 9. Sealing ring. DETAILED DESCRIPTION
[0027] The following will clearly and completely describe the technical solutions in the utility model embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the utility model embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of utility model protection.
[0028] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0029] See also Figures 1-6 As shown, the utility model is a hollow fiber hemodialyzer for blood purification, comprising a shell 1, an end cap 2 being threadedly connected to the outer surface of the shell 1, a hollow fiber membrane 3 being fixedly connected to the interior of the shell 1, a first connecting component 4 being provided inside the end cap 2, a blood transfusion tube 5 being provided on the outer surface of the first connecting component 4, a second connecting component 6 being provided between the first connecting component 4 and the blood transfusion tube 5, a limiting component 7 being provided between the first connecting component 4 and the shell 1, a third connecting component 8 being fixedly connected to the outer surface of the shell 1, the second connecting component 6 being used to fix the first connecting component 4 and the blood transfusion tube 5, and the limiting component 7 being used to limit the moving distance of the first connecting component 4 in the end cap 2.
[0030] There are two groups of end cap 2, first connecting assembly 4, blood transfer tube 5, second connecting assembly 6, limiting assembly 7 and third connecting assembly 8.
[0031] The patient's blood enters the housing 1 through one of the blood tubes 5. The third connecting assembly 8 on the housing 1 is connected to the dialysate. The dialysate and the patient's blood are separated by the hollow fiber membrane 3 within the housing 1. Due to the concentration gradient of small solutes in the blood and dialysate, different osmotic concentrations are formed during flow. Small molecule toxins in the blood, including metabolites, drugs, and exogenous poisons such as urea, creatinine, and uric acid, migrate from the high-concentration blood side through the semipermeable membrane to the dialysate side. The dialysate then removes these toxins, achieving the purpose of blood purification. When the angular position of the blood tube 5 needs to be adjusted, the blood tube 5 is fixed to the first connecting assembly 4 by the second connecting assembly 6. Rotating the first connecting assembly 4 drives the blood tube 5 to rotate, while the first connecting assembly 4 slides within the end cap 2. The limit assembly 7 limits the movement of the first connecting assembly 4. The first connecting assembly 4 and the end cap 2 are threaded together, ensuring a tight seal while allowing the first connecting assembly 4 and the blood tube 5 to rotate at a certain angle.
[0032] The present invention connects the first connecting component 4 and the limiting component 7, and the first connecting component 4 and the blood transfusion tube 5 are fixed by the second connecting component 6. When the blood transfusion tube 5 is adjusted, the first connecting component 4 is driven to rotate synchronously, and the first connecting component 4 is also moved in the end cover 2 when it rotates. At this time, the limiting component 7 can limit the first connecting component 4 to prevent the first connecting component 4 from being separated from the end cover 2. The threaded connection between the first connecting component 4 and the end cover 2 can enhance the sealing performance, and the angle of the blood transfusion tube 5 can be adjusted while ensuring the sealing performance, thereby avoiding the situation of twisting and squeezing.
[0033] In one embodiment, for the above-mentioned first connecting component 4, the first connecting component 4 includes a left spiral tube 401, the left spiral tube 401 is threadedly connected to the end cover 2, the end of the left spiral tube 401 is fixedly connected to the middle tube 402, the end of the middle tube 402 is fixedly connected to the right spiral tube 403, and the right spiral tube 403 is threadedly connected to the blood transfer tube 5.
[0034] The threads between the left spiral tube 401 and the end cover 2 and between the right spiral tube 403 and the blood transfer tube 5 are both sealed pipe threads, thereby ensuring sealing.
[0035] In one embodiment, for the above-mentioned second connecting component 6, the second connecting component 6 includes a fixed ring 601, which is fixedly connected to the blood transfer tube 5. The outer surface of the fixed ring 601 is fixedly connected to an elastic hook 602. The fixed ring 601 is clamped with a movable ring 603 through the elastic hook 602. The movable ring 603 is slidably connected to the intermediate tube 402. The outer surface of the intermediate tube 402 is fixedly connected to a first limiting ring 604.
[0036] The outer surface of the movable ring 603 is provided with a groove that matches the elastic hook 602. First, connect the blood transfer tube 5 to the right spiral tube 403, and then push the movable ring 603 towards the blood transfer tube 5 until the movable ring 603 is close to the first limiting ring 604. During this process, the movable ring 603 squeezes the elastic hook 602 to bend it, and the elastic hook 602 passes through the groove on the movable ring 603 and then resets, thereby fixing the movable ring 603. At this time, the elastic hook 602 can play a role in limiting and fixing the right spiral tube 403 and the blood transfer tube 5.
[0037] In one embodiment, for the above-mentioned limiting assembly 7, the limiting assembly 7 includes a second limiting ring 701, the second limiting ring 701 is fixedly connected to the intermediate tube 402, the second limiting ring 701 is located inside the end cover 2, a slide groove 702 is opened inside the end cover 2, and the second limiting ring 701 is slidably connected inside the slide groove 702.
[0038] When the blood transfusion tube 5 is rotated to adjust the angle, the blood transfusion tube 5 drives the intermediate tube 402 to rotate synchronously via the elastic hook 602. The intermediate tube 402 is threadedly connected to the end cap 2 via the left screw tube 401, so that the intermediate tube 402 moves within the end cap 2 while rotating. At this time, the second limiting ring 701 on the intermediate tube 402 moves within the slide groove 702. The slide groove 702 can limit the movement distance of the second limiting ring 701 and the intermediate tube 402, preventing the intermediate tube 402 and the left screw tube 401 from separating from the end cap 2. The sealing pipe threaded connection between the left screw tube 401 and the end cap 2 can ensure sealing.
[0039] In one embodiment, for the above-mentioned third connecting component 8, there are two groups of the third connecting component 8, and the third connecting component 8 includes a dialysate tube 801, the dialysate tube 801 is fixedly connected to the shell 1, the dialysate tube 801 and the shell 1 are interconnected, and the end of the dialysate tube 801 is provided with an end cap 802.
[0040] The two sets of dialysate tubes 801 are used for inputting and outputting dialysate respectively. The end caps 802 on the dialysate tubes 801 can protect the dialysate tubes 801 before use.
[0041] In one embodiment, for the above-mentioned end cover 2 , a sealing ring 9 is fixedly connected to the interior of the end cover 2 , and the sealing ring 9 is located between the end cover 2 and the housing 1 .
[0042] The thread between the end cover 2 and the housing 1 is a sealing pipe thread. When the end cover 2 is connected to the housing 1, the housing 2 squeezes the sealing ring 9 to deform it and fill the gap, thereby enhancing the sealing performance.
[0043] In one embodiment, for the above-mentioned hollow fiber membrane 3, the raw material of the hollow fiber membrane 3 is polysulfone, the raw material of the shell 1 and the end cap 2 is polycarbonate, the shell 1 and the hollow fiber membrane 3 are fixedly connected by two-component polyurethane, the raw material of the sealing ring 9 is silicone rubber, and the raw material of the end cap 802 is polyethylene.
[0044] Polysulfone membranes have a high ability to remove harmful substances such as urea, creatinine, uric acid, and middle-molecular toxins, and exhibit excellent ultrafiltration rates. Polycarbonate (PC) is the raw material for the hemodialysis housing and end caps. PC is a high-molecular-weight polymer containing carbonate groups in its molecular chain. PC is a nearly colorless, glassy, amorphous polymer with excellent optical properties. Polyurethane is the sealant component of the hemodialysis system, primarily separating each hollow fiber and connecting the housing to the fibers, ensuring complete separation of blood from the dialysate.
[0045] Through the above technical solution, 1. through the connection between the first connecting component 4 and the limiting component 7, the first connecting component 4 and the blood transfusion tube 5 are fixed by the second connecting component 6. When the blood transfusion tube 5 is adjusted, the first connecting component 4 will be driven to rotate synchronously, and the first connecting component 4 will also move in the end cover 2 when it rotates. At this time, the limiting component 7 can limit the first connecting component 4 to prevent the first connecting component 4 from being separated from the end cover 2. The threaded connection between the first connecting component 4 and the end cover 2 can enhance the sealing performance, and at the same time ensure the sealing performance, the angle of the blood transfusion tube 5 can be adjusted, thereby avoiding the situation of twisting and squeezing; 2. through the connection between the intermediate tube 402 and the second limiting component The right screw tube 403 on the middle tube 402 is fixed to the blood transfer tube 5 by the connection of the positioning plate 701. When the blood transfer tube 5 is adjusted, the elastic hook 602 drives the middle tube 402 to rotate synchronously. The left screw tube 401 on the middle tube 402 rotates and moves in the end cover 2. The second limiting ring 701 on the middle tube 402 moves synchronously in the slide groove 702. The slide groove 702 can limit the movement distance of the second limiting ring 701 and the middle tube 402 to prevent the left screw tube 401 from separating from the end cover 2. The threaded connection between the left screw tube 401 and the end cover 2 can ensure sealing. At the same time, the angle of the blood transfer tube 5 can be rotated and adjusted to avoid twisting and squeezing.
[0046] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0047] The preferred embodiments of the utility model disclosed above are intended only to help illustrate the utility model. The preferred embodiments do not describe all details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. This specification selects and describes these embodiments in detail to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A hollow fiber hemodialyzer for blood purification, comprising a housing (1), characterized in that: The outer surface of the shell (1) is threadedly connected to an end cap (2), the interior of the shell (1) is fixedly connected to a hollow fiber membrane (3), a first connecting component (4) is provided inside the end cap (2), a blood transfusion tube (5) is provided on the outer surface of the first connecting component (4), a second connecting component (6) is provided between the first connecting component (4) and the blood transfusion tube (5), a limiting component (7) is provided between the first connecting component (4) and the shell (1), a third connecting component (8) is fixedly connected to the outer surface of the shell (1), the second connecting component (6) is used to fix the first connecting component (4) and the blood transfusion tube (5), and the limiting component (7) is used to limit the moving distance of the first connecting component (4) in the end cap (2).
2. A hollow fiber hemodialyzer for blood purification according to claim 1, characterized in that: The first connecting assembly (4) comprises a left spiral tube (401), the left spiral tube (401) being threadedly connected to the end cover (2), the end of the left spiral tube (401) being fixedly connected to an intermediate tube (402), the end of the intermediate tube (402) being fixedly connected to a right spiral tube (403), and the right spiral tube (403) being threadedly connected to the blood transfusion tube (5).
3. A hollow fiber hemodialyzer for blood purification according to claim 2, characterized in that: The second connecting assembly (6) comprises a fixed ring (601), the fixed ring (601) is fixedly connected to the blood transfusion tube (5), the outer surface of the fixed ring (601) is fixedly connected to an elastic hook (602), the fixed ring (601) is clamped with a movable ring (603) via the elastic hook (602), the movable ring (603) is slidably connected to the intermediate tube (402), and the outer surface of the intermediate tube (402) is fixedly connected to a first limiting ring (604).
4. A hollow fiber hemodialyzer for blood purification according to claim 3, characterized in that: The limiting assembly (7) includes a second limiting ring (701), the second limiting ring (701) is fixedly connected to the intermediate tube (402), the second limiting ring (701) is located inside the end cover (2), a sliding groove (702) is provided inside the end cover (2), and the second limiting ring (701) is slidably connected inside the sliding groove (702).
5. A hollow fiber hemodialyzer for blood purification according to claim 4, characterized in that: There are two groups of the third connecting components (8), and the third connecting components (8) include a dialysate tube (801), the dialysate tube (801) is fixedly connected to the shell (1), the dialysate tube (801) and the shell (1) are interconnected, and the end of the dialysate tube (801) is provided with an end cap (802).
6. A hollow fiber hemodialyzer for blood purification according to claim 5, characterized in that: A sealing ring (9) is fixedly connected to the interior of the end cover (2), and the sealing ring (9) is located between the end cover (2) and the housing (1).
7. A hollow fiber hemodialyzer for blood purification according to claim 6, characterized in that: The raw material of the hollow fiber membrane (3) is polysulfone, the raw material of the shell (1) and the end cap (2) is polycarbonate, the shell (1) and the hollow fiber membrane (3) are fixedly connected by two-component polyurethane, the raw material of the sealing ring (9) is silicone rubber, and the raw material of the end cap (802) is polyethylene.