Non-gravity closed blood return puncture needle for dialysis
By designing a non-gravity closed hemotherapy retrieval needle for dialysis connected with a tee connection, the problem of difficulty in speed control and inconvenient bubble discharge during the closed hemodialysis process is solved, and the closed non-gravity retrieval is achieved, reducing the risk of infection and environmental pollution.
Patent Information
- Application Number
- CN202421696970.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the prior art, during the closed blood recovery process after hemodialysis, gravity blood transfusion has difficulty in controlling speed and inconvenient bubble emission. Special blood recovery methods destroy the airtightness and increase the risk of infection and the possibility of environmental pollution.
A non-gravity closed blood recovery needle for dialysis was designed, and a tee joint was used to connect the puncture needle, hose and infusion device, and a closed non-gravity recovery needle of blood was achieved by rotating the tee joint.
The closed non-gravity blood recovery is achieved, which avoids the difficulty of controlling the gravity return speed and the inconvenience of bubble emissions. At the same time, the problem of sealing damage in special blood recovery methods is avoided, reducing the risk of infection and environmental pollution.
Smart Images
Figure CN222955495U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, and particularly relates to a non-gravity closed blood return puncture needle for dialysis. Background Art
[0002] Hemodialysis (HD) is a method of removing metabolic wastes, harmful substances, and excessive water from the blood by using the principles of diffusion and convection, and is the main method for renal replacement therapy in patients with end-stage kidney disease. An arteriovenous fistula is the main type of vascular access for maintenance hemodialysis patients. By puncturing the arteriovenous fistula, an extracorporeal circulation is established to achieve the purpose of hemodialysis. After the patient's dialysis is completed, normal saline needs to be used to transfuse the patient's blood back. The "Standard Operating Procedures for Blood Purification (2021 Edition)" requires that the blood return methods include closed blood return and special blood return methods. One of the steps in closed blood return requires turning off the blood pump and relying on gravity to transfuse the blood in the proximal arterial line back into the body. During the transfusion process, it is necessary to ensure that there are no air bubbles in the infusion set and arterial line. For a small number of cases with too high internal fistula pressure, abnormal coagulation, and anticoagulant-free dialysis, special blood return methods can be used. One of the steps requires turning off the blood pump, disconnecting the puncture needle from the arterial line, connecting a sterile needle inserted into the saline, and adjusting the blood flow rate to 50-100 ml / min for blood return. Currently, during the clinical blood return process, for these two blood return methods, first, it is necessary to judge the blood return method according to the patient's condition. When transfusing blood by gravity closed method, there are many factors controlling the saline transfusion speed, and it is inconvenient to exhaust air when there are air bubbles in the infusion set and pipeline. For the special blood return method, the airtightness is damaged, the patient's blood is exposed to the environment, the patient is at risk of infection, and it is easy to cause blood dripping, polluting the environment and medical staff, increasing the risk of occupational exposure. Summary of the Utility Model
[0003] The utility model provides a non-gravity closed blood return puncture needle for dialysis to solve one or several of the technical problems existing in the prior art.
[0004] The technical solution for the utility model to solve the above technical problems is as follows: A non-gravity closed blood return puncture needle for dialysis includes a puncture needle body, a flexible tube, and a three-way joint. The needle seat of the puncture needle body is connected to the first joint of the three-way joint. One end of the flexible tube is connected to the second joint of the three-way joint, and the third joint of the three-way joint is connected to a first threaded connection seat; the other end of the flexible tube is provided with a second threaded connection seat.
[0005] The beneficial effects of the present utility model are as follows: For the non-gravity closed blood return puncture needle for dialysis of the present utility model, by providing a three-way joint, when puncturing, the puncture needle body is communicated with the hose through the first joint and the second joint, and blood can flow into the hose through the puncture needle body, the first joint and the second joint. When blood is returned, by rotating the three-way joint, the communication between the first joint and the second joint is blocked, and the second joint and the third joint are communicated. The infusion set is connected through the first threaded connection seat of the third joint, achieving a closed non-gravity blood return state.
[0006] On the basis of the above technical solution, the present utility model can be further improved as follows.
[0007] Further, the needle seat of the puncture needle body is inserted into and adhesively fixed to the first joint of the three-way joint.
[0008] The beneficial effect of adopting the above further solution is: Inserting and adhesively fixing the needle seat and the first joint makes the whole structure more stable and reliable.
[0009] Further, the first joint of the three-way joint is sleeved outside the needle seat of the puncture needle body and adhesively fixed to the outer side wall of the needle seat.
[0010] Further, one end of the hose is inserted into and adhesively fixed to the second joint of the three-way joint.
[0011] Further, the second joint of the three-way joint is sleeved outside one end of the hose and adhesively fixed to the outer side wall of the hose.
[0012] Further, the third joint of the three-way joint is sleeved outside the first threaded connection seat and adhesively fixed to the outer side wall of the first threaded connection seat.
[0013] Further, the outer side wall of the first threaded connection seat is provided with a first external thread, and the first threaded connection seat is connected with a first sealing cap through the first external thread.
[0014] The beneficial effect of adopting the above further solution is: By providing the first sealing cap, when not in use, the first threaded connection seat can be sealed to avoid external contamination.
[0015] Further, the outer side wall of the second threaded connection seat is provided with a second external thread, and the second threaded connection seat is connected with a second sealing cap through the second external thread.
[0016] The beneficial effect of adopting the above further solution is: By providing the second sealing cap, when not in use, the second threaded connection seat can be sealed to avoid external contamination.
[0017] Further, a flow stop clamp is provided on the hose.
[0018] Further, the first joint and the second joint are coaxially arranged, and the third joint is perpendicularly arranged with respect to the first joint. Description of the Drawings
[0019] Figure 1 This is a schematic structural view of the non-gravity closed blood return puncture needle for dialysis of the present utility model.
[0020] In the drawings, the list of components represented by each reference numeral is as follows:
[0021] 1. Puncture needle body; 2. Hose; 3. Three-way joint; 4. First joint; 5. Second joint; 6. Third joint; 7. First threaded connection seat; 8. Second threaded connection seat; 9. Needle seat; 10. First sealing cap; 11. Second sealing cap; 12. Flow stop clamp. Detailed Embodiments
[0022] The principles and features of the present utility model will be described below with reference to the drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0023] As Figure 1 shown, a non-gravity closed blood return puncture needle for dialysis in this embodiment includes a puncture needle body 1, a hose 2, and a three-way joint 3. The needle seat 9 of the puncture needle body 1 is connected to the first joint 4 of the three-way joint 3. One end of the hose 2 is connected to the second joint 5 of the three-way joint 3. A first threaded connection seat 7 is connected to the third joint 6 of the three-way joint 3. The other end of the hose 2 is provided with a second threaded connection seat 8. The first threaded connection seat 7 can be a male Luer connector, and the second threaded connection seat 8 can also be a male Luer connector.
[0024] As Figure 1 shown, a preferred solution in this embodiment is that the needle seat 9 of the puncture needle body 1 is inserted into and adhesively fixed to the first joint 4 of the three-way joint 3. Inserting and adhesively fixing the needle seat and the first joint makes the whole structure more stable and reliable.
[0025] Optionally, as Figure 1 shown, the first joint 4 of the three-way joint 3 is sleeved outside the needle seat 9 of the puncture needle body 1 and adhesively fixed to the outer side wall of the needle seat 9.
[0026] As Figure 1 shown, a preferred solution in this embodiment is that one end of the hose 2 is inserted into and adhesively fixed to the second joint 5 of the three-way joint 3.
[0027] Optionally, as Figure 1As shown, the second joint 5 of the tee joint 3 is sleeved outside one end of the hose 2 and is fixed to the outer side wall of the hose 2 by gluing.
[0028] As Figure 1 shown, a preferred solution of this embodiment is that the third joint 6 of the tee joint 3 is sleeved outside the first threaded connection seat 7 and is fixed to the outer side wall of the first threaded connection seat 7 by gluing.
[0029] Specifically, as Figure 1 shown, the outer side wall of the first threaded connection seat 7 is provided with a first external thread, and the first threaded connection seat 7 is connected with a first sealing cap 10 through the first external thread. By providing the first sealing cap, when not in use, the first threaded connection seat can be sealed to avoid external contamination.
[0030] Specifically, as Figure 1 shown, the outer side wall of the second threaded connection seat 8 is provided with a second external thread, and the second threaded connection seat 8 is connected with a second sealing cap 11 through the second external thread. By providing the second sealing cap, when not in use, the second threaded connection seat can be sealed to avoid external contamination.
[0031] As Figure 1 shown, a flow restrictor clip 12 is provided on the hose 2.
[0032] Preferably, as Figure 1 shown, the first joint 4 and the second joint 5 are coaxially arranged, and the third joint 6 is perpendicularly arranged with respect to the first joint 4.
[0033] Among them, the tee joint 3 of this embodiment uses a medical tee joint, also called a sterile stopcock, such as the German Braun medical tee joint 409511CN, etc.
[0034] The puncture needle body 1 of this embodiment can use a commonly used medical puncture needle.
[0035] For the non-gravity closed blood return puncture needle for dialysis of this embodiment, by providing a tee joint, when puncturing, the puncture needle body is communicated with the hose through the first joint and the second joint, and blood can flow into the hose through the puncture needle body, the first joint, and the second joint. When returning blood, by rotating the tee joint, the connection between the first joint and the second joint is blocked, so that the second joint and the third joint are communicated, and an infusion device is connected through the first threaded connection seat of the third joint, achieving a closed non-gravity blood return state.
[0036] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.
[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0038] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0039] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0040] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0041] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A non-gravity sealed blood return puncture needle for dialysis, characterized in that: It includes a puncture needle body, a hose and a three-way joint. The needle seat of the puncture needle body is connected to the first joint of the three-way joint, one end of the hose is connected to the second joint of the three-way joint, and the third joint of the three-way joint is connected to a first threaded connection seat; the other end of the hose is provided with a second threaded connection seat.
2. A non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: The needle seat of the puncture needle body is plugged into the first connector of the three-way connector and fixed by gluing.
3. A non-gravity sealed blood return puncture needle for dialysis according to claim 2, characterized in that: The first connector of the three-way connector is sleeved outside the needle seat of the puncture needle body and is fixed to the outer side wall of the needle seat by gluing.
4. A non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: One end of the hose is plugged into the second joint of the three-way joint and fixed by gluing.
5. A non-gravity sealed blood return puncture needle for dialysis according to claim 4, characterized in that: The second joint of the three-way joint is sleeved outside one end of the hose and is fixed to the outer side wall of the hose by gluing.
6. A non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: The third joint of the three-way joint is sleeved outside the first threaded connection seat and is fixed to the outer side wall of the first threaded connection seat by gluing.
7. A non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: A first external thread is provided on the outer side wall of the first threaded connection seat, and the first threaded connection seat is connected to a first sealing cap via the first external thread.
8. The non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: A second external thread is provided on the outer side wall of the second threaded connection seat, and the second threaded connection seat is connected to a second sealing cap via the second external thread.
9. The non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: The hose is provided with a flow-blocking clamp.
10. The non-gravity sealed blood return puncture needle for dialysis according to claim 1, characterized in that: The first joint and the second joint are arranged coaxially, and the third joint is arranged perpendicular to the first joint.