Disposable remaining needle for hemodialysis

Abstract

The utility model relates to the technical field of medical instruments and equipment, and particularly discloses a disposable indwelling needle for hemodialysis, which comprises a needle body and a three-way valve, and at least one of three interfaces of the three-way valve is a screwed joint; one interface of the three-way valve is communicated with the needle body through a hose, and the other two interfaces of the three-way valve are respectively provided with a male spiral protective cap and a heparin cap; a valve is arranged on the hose; the needle body comprises a cannula seat and a needle seat, a bearing cavity is formed in the cannula seat, a connecting seat is communicated with the side wall of the cannula seat, and one end, far away from the three-way valve, of the hose is communicated with the connecting seat; a sleeve is arranged at one end of the sleeve seat; one end of the bearing cavity is communicated with the sleeve; a sleeve rivet, an isolation plug and a needle seat are respectively arranged in the bearing cavity, a needle tube is arranged on the needle seat, and the needle tube sequentially penetrates out of the isolation plug, the sleeve rivet and the sleeve; the indwelling needle solves the problems that when a traditional indwelling needle for dialysis is externally connected with a pipeline, on-off control over a plurality of external pipelines is very inconvenient, and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument equipment technical field, specifically, relate to the indwelling needle for disposable hemodialysis. BACKGROUND

[0002] With the change of people's living habits, the incidence of renal failure caused by chronic kidney disease and other chronic diseases (mainly diabetes and hypertension) worldwide is increasing year by year, leading to an increase in the number of patients with end-stage renal disease (ESRD). ESRD refers to the irreversible decline of kidney function, which makes patients rely on kidney replacement therapy (i.e. kidney transplantation and dialysis treatment) to maintain normal life needs.

[0003] The main use of dialysis puncture needle on the market is steel needle (arteriovenous puncture needle), and one dialysis is basically 4 hours. The 16G-18G stainless steel needle is inserted into the human blood vessel, which has a high possibility of damaging the blood vessel wall. At the same time, the traditional indwelling needle for dialysis is very inconvenient for the on-off control of multiple external pipelines. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an indwelling needle for disposable hemodialysis, which solves the problem of the traditional indwelling needle for dialysis being very inconvenient for the on-off control of multiple external pipelines.

[0005] The utility model realizes the following technical scheme: an indwelling needle for disposable hemodialysis, comprising a needle body and a three-way valve; at least one of the three interfaces of the three-way valve is provided as a threaded joint;

[0006] One interface of the three-way valve is communicated with the needle body through a hose, and the other two interfaces of the three-way valve are respectively provided with a male screw cap and a heparin cap;

[0007] A valve is arranged on the hose.

[0008] Further, the valve comprises a valve plate, and a first through hole and a second through hole communicated with the first through hole are arranged on the valve plate;

[0009] The hose is arranged out of the first through hole, and the hose is gap-fitted with the first through hole. The second through hole is V-shaped, and the end of the second through hole with a wider diameter is connected with the first through hole.

[0010] Further, the valve is a Robert clamp.

[0011] Further, a third through hole is further arranged on the valve plate, one end of the third through hole is communicated with the first through hole, and the other end of the third through hole is communicated with the end of the valve plate.

[0012] Furthermore, the needle body includes a cannula seat and a needle seat, the cannula seat is provided with a receiving cavity, a connecting seat is provided on the side wall of the cannula seat, and the end of the tubing away from the three-way valve is connected to the connecting seat;

[0013] One end of the sleeve seat is provided with a sleeve, and one end of the receiving cavity is connected to the sleeve;

[0014] The receiving cavity is respectively provided with a sleeve rivet, an isolation plug and a needle seat, and a needle tube is provided on the needle seat. The needle tube passes through the isolation plug, sleeve rivet and sleeve in sequence.

[0015] Furthermore, the needle holder is interference-fitted with the receiving cavity, and the needle holder is provided with needle wings.

[0016] Furthermore, it also includes a protective cap, which is fitted into one end of the cannula seat, with the cannula and needle placed inside the protective cap.

[0017] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0018] 1. Use a three-way valve to control the access path. At least one of the three ports of the three-way valve should be a threaded connector. The threaded connector allows for quick connection of accessories with Luer connectors or hemodialysis tubing. This facilitates rapid switching of external devices by medical staff. For example, a syringe can be inserted through the heparin cap, and a hemodialysis tubing or a syringe with a threaded interface can be connected through the threaded connector at the male spiral cap end. It also ensures the stability of the hemodialysis tubing connection during long-term dialysis. Other supplementary tubing can also be connected when necessary.

[0019] 2. Both the male spiral cap and the heparin cap are threadedly connected to the three-way valve. The heparin cap has a built-in rubber plug, which can effectively prevent blood leakage and facilitate the injection of the drug. Together with the valve, it provides multiple protections against the risk of blood leakage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the disposable hemodialysis indwelling needle provided by this utility model;

[0022] Figure 2 A three-dimensional structural diagram of the three-way valve in the disposable hemodialysis indwelling needle provided by this utility model;

[0023] Figure 3 A schematic diagram of the structure of the disposable hemodialysis indwelling needle using the Robert clip provided by this utility model;

[0024] Icons: 1. Three-way valve, 11. Threaded connector, 2. Hose, 3. Male spiral cap, 4. Heparin cap, 5. Valve plate, 51. First through hole, 52. Second through hole, 53. Third through hole, 6. Sleeve seat, 61. Receiver cavity, 62. Connector seat, 63. Sleeve, 64. Sleeve rivet, 65. Isolation plug, 7. Needle seat, 71. Needle tube, 72. Needle wing, 8. Cap, 9. Robert clip. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] Reference Figures 1 to 3 As shown, this embodiment provides a disposable indwelling needle for hemodialysis, including a needle body and a three-way valve; the needle body is mainly used for puncture and connection of blood vessels, and a traditional indwelling needle can be used; at least one of the three ports of the three-way valve 1 is configured as a threaded connector 11; some accessories with Luer connectors or hemodialysis tubing can be quickly connected through the threaded connector 11.

[0028] More specifically, such as Figure 1 and 2 As shown, one port of the three-way valve 1 is connected to the needle body via a flexible tube 2. The other two ports of the three-way valve 1 are respectively equipped with a male spiral cap 3 and a heparin cap 4. Both the male spiral cap 3 and the heparin cap 4 are threadedly connected to the three-way valve 1. The heparin cap 4 has a built-in rubber plug, which can effectively prevent blood leakage and facilitate the injection of medication. Together with the valve, multiple preventions are made against the risk of blood leakage. After unscrewing the male spiral cap 3, the hemodialysis tubing can be quickly connected to the threaded connector 11 at this location during hemodialysis. This not only allows for quick connection but also ensures the stability of the hemodialysis tubing connection during long-term dialysis. Other supplementary tubing can also be connected if necessary.

[0029] likeFigure 1 and 2 As shown, in specific implementation, the three-way valve 1 here is an L-type three-way valve 1OFF version. The three-way valve 1 is bonded to the silicone tubing 2 via a connector. The three-way valve 1 can switch between two pathways. It is a one-way valve with a total travel of 180°. Rotating counterclockwise from the heparin cap 4 end to the tubing 2 end, the pathway is switched by rotating the core of the three-way valve 1 during dialysis. The core of the three-way valve 1 has a three-hole structure. When the core of the three-way valve 1 points towards the heparin cap 4 end, the heparin cap 4 end is closed, and the pathway from the male spiral cap 3 end to the tubing 2 end is open. When the core of the three-way valve 1 points towards the male spiral cap 3 end, the male spiral cap 3 end is closed, and the pathway from the heparin cap 4 end to the tubing 2 end is open. This facilitates rapid switching of external devices by medical staff. For example, a syringe can be connected via the heparin cap 4, and a hemodialysis tubing or a syringe with a threaded interface can be connected via the threaded connector at the male spiral cap 3 end.

[0030] like Figures 1-3 As shown, a valve is installed on the hose 2. The specific method of valve selection is not limited. It is mainly used for the opening and closing control of the hose 2 passage.

[0031] like Figure 1 As shown, the valve can be a single-piece clamp, which includes a valve plate 5. A first through hole 51 and a second through hole 52 communicating with the first through hole 51 are provided on the valve plate 5. The hose 2 passes through the first through hole 51 and is clearance-fitted with the first through hole 51. The second through hole 52 is V-shaped, and the wider end of the second through hole 52 is connected to the first through hole 51.

[0032] In specific implementation, the valve plate 5 is also provided with a third through hole 53. One end of the third through hole 53 is connected to the first through hole 51, and the other end of the third through hole 53 is connected to the end of the valve plate 5. The hose 2 can enter the first through hole 51 through the third through hole 53. When the hose 2 is placed in the first through hole 51, the third through hole 53 is in a conductive state. When the hose 2 is gradually pushed into the second through hole 52 to the end, the width of the second through hole 52 becomes narrower and narrower, slowly squeezing the hose 2 until the inner cavity of the hose 2 is sealed.

[0033] More specifically, such as Figure 3 As shown, in another embodiment, the valve is a Robert clamp 9, which can also be used to control the opening and closing of the hose 2.

[0034] like Figure 1As shown, the needle body includes a cannula seat 6 and a needle seat 7. The cannula seat 6 has a receiving cavity 61. A connecting seat 62 is connected to the side wall of the cannula seat 6. The end of the hose 2 away from the three-way valve 1 is connected to the connecting seat 62. A sleeve 63 is provided at one end of the cannula seat 6, and one end of the receiving cavity 61 is connected to the sleeve 63. A sleeve rivet 64, an isolation plug 65 and a needle seat 7 are respectively provided in the receiving cavity 61. A needle tube 71 is provided on the needle seat 7. The needle tube 71 passes through the isolation plug 65, the sleeve rivet 64 and the sleeve 63 in sequence.

[0035] The needle seat 7 is interference-fitted with the receiving cavity 61, so the needle seat 7 is not easy to fall off or slide. The needle seat 7 is provided with a needle wing 72, which facilitates the control of the needle seat 7.

[0036] It also includes a protective cap 8, which fits into one end of the cannula seat 6. The cannula 63 and the needle tube 71 are placed inside the protective cap 8 to protect them from contamination and damage, and to prevent dust.

[0037] like Figure 1 As shown, remove the cap 8 from the needle tube 71, hold the needle hub 7 with the needle wings 72 in one hand, and fix the blood vessel to be punctured with the other hand. After the puncture is in place, hold the needle hub 7 with the wings and pull the needle tube 71 backward from the isolation plug 65, leaving the cannula 63 in the blood vessel. The soft cannula 63 is left in the blood vessel, which is less likely to cause damage to the blood vessel. The blood vessel is placed in a plastic catheter throughout the dialysis process. The material is fluoroplastic or TPU material, with TPU material being preferred. This material softens in warm blood and floats in the blood vessel, further reducing the possibility of damage to the blood vessel.

[0038] Blood returns to tubing 2 via a side branch, and the single-piece clip / Robert clip 9 on tubing 2 can stop the blood flow. The end has an L-shaped three-way valve 1 for switching channels, with threaded interfaces at both ends. One end has an external heparin cap 4, which can be connected to a syringe for anticoagulation injection, or connected to accessories.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A disposable indwelling needle for hemodialysis, characterized in that: Includes a needle body and a three-way valve (1); at least one of the three ports of the three-way valve (1) is configured as a threaded connector (11); One port of the three-way valve (1) is connected to the needle body via a flexible tube (2), and the other two ports of the three-way valve (1) are respectively provided with a male spiral cap (3) and a heparin cap (4); A valve is provided on the hose (2).

2. The disposable indwelling needle for hemodialysis according to claim 1, characterized in that, The valve includes a valve plate (5), on which a first through hole (51) and a second through hole (52) communicating with the first through hole (51) are provided; The flexible tube (2) extends through the first through hole (51) and is clearance-fitted with the first through hole (51). The second through hole (52) is V-shaped and the wider end of the second through hole (52) is connected to the first through hole (51).

3. The disposable indwelling needle for hemodialysis according to claim 1, characterized in that, The valve is a Robert clamp (9).

4. The disposable indwelling needle for hemodialysis according to claim 2, characterized in that, The valve plate (5) is also provided with a third through hole (53), one end of which is connected to the first through hole (51), and the other end of which is connected to the end of the valve plate (5).

5. The disposable indwelling needle for hemodialysis according to any one of claims 3 or 4, characterized in that, The needle body includes a cannula seat (6) and a needle seat (7). The cannula seat (6) is provided with a receiving cavity (61). A connecting seat (62) is provided on the side wall of the cannula seat (6). The end of the hose (2) away from the three-way valve (1) is connected to the connecting seat (62). The sleeve seat (6) is provided with a sleeve (63) at one end, and the receiving cavity (61) is connected to the sleeve (63) at one end; The receiving cavity (61) is provided with a sleeve rivet (64), an isolation plug (65) and a needle seat (7). The needle seat (7) is provided with a needle tube (71). The needle tube (71) passes through the isolation plug (65), the sleeve rivet (64) and the sleeve (63) in sequence.

6. The disposable indwelling needle for hemodialysis according to claim 5, characterized in that, The needle seat (7) is interference-fitted with the receiving cavity (61), and the needle seat (7) is provided with a needle wing (72).

7. The disposable indwelling needle for hemodialysis according to claim 6, characterized in that, It also includes a protective cap (8), which is fitted into one end of the cannula seat (6), and the cannula (63) and needle tube (71) are placed inside the protective cap (8).

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