Blood sampling device for hemodialysis

Abstract

The utility model discloses a blood sampling device for hemodialysis, and relates to the technical field of medical instruments. A blood sampling device for hemodialysis comprises a puncture needle, a connecting cover and a collecting tank, the connecting cover is used for communicating the puncture needle with the collecting tank, the puncture needle comprises a needle head and a blood sampling needle tube, and the connecting cover is installed on the needle head in the vertical direction of the axis of the blood sampling needle tube. During blood collection, blood enters the needle head through the blood collection needle tube and then enters the collection tank through the connecting cover in the first direction, a tube cavity is formed in one end of the needle head, and one end of the blood collection needle tube is installed in the tube cavity. Through the arrangement of the connecting cover, the collecting tank and the like, in the using process, the collecting tank is held in the palm center, the blood collecting needle tube pierces into the skin at a small angle to collect blood, the discomfort of a patient is reduced, the effect is good, and the whole blood collecting device is simple in structure, convenient to operate and suitable for popularization and application. And the blood sampling quality can be improved on the premise that the blood sampling efficiency is not reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a blood collection device for hemodialysis. Background Technique

[0002] Blood collection is often required before hemodialysis. The main purpose is to evaluate the health status and blood parameters of patients to ensure the safety and effectiveness of dialysis treatment. By checking indicators such as creatinine and urea nitrogen in the blood, the renal function of patients can be evaluated. This helps medical staff understand the renal condition of patients and determine the suitability and parameter settings of dialysis treatment.

[0003] To facilitate blood collection, a two-way vacuum blood collection device is often used. The blood collection tube and the needle of this blood collection device are on the same axis. Usually, the tube is much thicker than the needle, which causes medical staff to pierce the skin at a larger angle to avoid the tube contacting the skin and interfering with the puncture step. This increases the difficulty of puncturing the blood vessel and also increases the discomfort of the patient. In view of this situation, the utility model proposes a new solution. Content of the Utility Model

[0004] The purpose of the utility model is to provide a blood collection device for hemodialysis to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A blood collection device for hemodialysis, comprising:

[0006] A puncture needle, a connecting cap and a collection tank;

[0007] The connecting cap is used to connect the puncture needle and the collection tank;

[0008] The puncture needle includes a needle head and a blood collection needle tube. The connecting cap is installed on the needle head in the vertical direction of the axis of the blood collection needle tube. During blood collection, blood enters the needle head through the blood collection needle tube and then enters the collection tank along the first direction through the connecting cap.

[0009] Furthermore, for this solution, one end of the needle head is provided with a lumen, one end of the blood collection needle tube is installed in the lumen, and a convex portion is provided at the connection between the needle head and the connecting cap. A through hole penetrating the blood collection needle tube is provided in the middle of the convex portion.

[0010] Furthermore, for this solution, the blood collection needle tube is connected with a connecting needle tube whose axis is consistent with that of the through hole, and the blood collection needle tube is connected to the collection tank through the connecting needle tube.

[0011] Furthermore, for this solution, a sealing plug is provided at the bottom of the connecting cap. The cross-section of the through hole is in the shape of a cone with a wider top and a narrower bottom, and the sealing plug is in interference connection with the inner wall of the convex portion.

[0012] Further with regard to this solution, a hollow connecting column is provided at the top of the connecting cover. A sealing diaphragm is arranged inside the hollow connecting column, and a chamber is formed between the sealing diaphragm and the top wall of the hollow connecting column.

[0013] Further with regard to this solution, the collection tank includes a bottle body. The bottle body is perpendicular to the first direction and is screwed to the hollow connecting column. Wherein, an air bladder is provided at the mouth of the bottle body. The air bladder is located inside the chamber. The inside of the air bladder is hollow. After the connecting syringe needle continuously pierces the sealing diaphragm and the air bladder, it is communicated with the bottle body.

[0014] Further with regard to this solution, an air connecting pipe communicating with the inside of the bottle body is installed on the bottle body.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] Through the arrangement of the connecting cover and the collection tank, etc., during the use process of this blood collection device for hemodialysis, the collection tank is held in the palm, and the blood collection syringe needle pierces the skin at a smaller angle for blood collection, reducing the discomfort of the patient, with better effects. Moreover, the entire blood collection device has a simple structure and is easy to operate, and can improve the blood collection quality without reducing the blood collection efficiency.

[0017] At the same time, this device is small and compact, and there is not much difference from the traditional blood collection device in use, enabling medical staff to quickly get started and use it, with better effects and having a good market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic sectional structure diagram of the present utility model;

[0020] Figure 3 is the Figure 2 enlarged schematic structure diagram of part A in the present utility model.

[0021] In the figure: 1. puncture needle; 101. needle tip; 102. lumen; 103. convex part; 104. connecting syringe needle; 105. blood collection syringe needle; 2. dial; 3. needle sleeve; 4. connecting cover; 401. sealing plug; 402. hollow connecting column; 403. sealing diaphragm; 5. collection tank; 501. bottle body; 502. air connecting pipe; 503. air bladder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the drawings are not drawn in actual proportional relationships. For example, the thickness or width of some layers may be exaggerated relative to other layers.

[0025] As Figures 1 - 3 shown, the present invention provides a technical solution: a blood collection device for hemodialysis, including:

[0026] A puncture needle 1, a connection cap 4, and a collection tank 5. The connection cap 4 is used to connect the puncture needle 1 and the collection tank 5. The puncture needle 1 includes a needle tip 101 and a blood collection needle tube 105. The connection cap 4 is installed on the needle tip 101 in the vertical direction of the axis of the blood collection needle tube 105. During blood collection, blood enters the needle tip 101 through the blood collection needle tube 105 and then enters the collection tank 5 along the first direction through the connection cap 4.

[0027] To ensure the smooth implementation of this embodiment, it should be understood that one end of the needle tip 101 is provided with a lumen 102, one end of the blood collection needle tube 105 is installed in the lumen 102, a convex portion 103 is provided at the connection between the needle tip 101 and the connection cap 4, a through hole penetrating the blood collection needle tube 105 is provided in the middle of the convex portion 103, a connection needle tube 104 aligned with the axis of the through hole is connected to the blood collection needle tube 105, the blood collection needle tube 105 is connected to the collection tank 5 through the connection needle tube 104, a sealing plug 401 is provided at the bottom of the connection cap 4, the cross-section of the through hole is in a tapered shape with a wider upper part and a narrower lower part, the sealing plug 401 is in interference connection with the inner wall of the convex portion 103, the sealing plug 401 is a rubber sealing plug 401, the bottom of which is chamfered, and the interference connection with the convex portion 103 increases friction to ensure tight connection and sealing. After the connection cap 4 is installed on the puncture needle 1, the connection needle tube 104 is connected to the connection cap 4, and the connection cap 4 acts as a connecting piece to transfer blood.

[0028] As Figure 2 and Figure 3 shown, to ensure the smooth implementation of this embodiment, it should be understood that a hollow connecting column 402 is provided at the top of the connecting cover 4, a sealing diaphragm 403 is provided inside the hollow connecting column 402, and a chamber is formed between the sealing diaphragm 403 and the top wall of the hollow connecting column 402.

[0029] As Figure 2 and Figure 3 shown, to ensure the smooth implementation of this embodiment, it should be understood that the collection tank 5 includes a bottle body 501, the bottle body 501 is perpendicular to the first direction and is screwed to the hollow connecting column 402. Among them, an air bladder 503 is provided at the bottle mouth of the bottle body 501, the air bladder 503 is located in the chamber, and the connection method is simple and reliable.

[0030] As Figure 2 and Figure 3 shown, to ensure the smooth implementation of this embodiment, it should be understood that the inside of the air bladder 503 is hollow. After the connecting syringe 104 continuously pierces the sealing diaphragm 403 and the air bladder 503, it is connected to the bottle body 501, which can effectively ensure sealing and avoid contamination.

[0031] As Figure 2 and Figure 3 shown, to ensure the smooth implementation of this embodiment, it should be understood that an air connecting tube 502 communicating with the inside of the bottle body 501 is installed on the bottle body 501. After piercing the skin, blood enters the collection tank 5 under the action of pressure. To avoid excessive pressure in the bottle, air is connected through the air connecting tube 502 to allow blood to smoothly enter the collection tank 5.

[0032] Therefore, this device is divided into four parts: the needle sleeve 3, the puncture needle 1, the connecting cover 4, and the collection tank 5. Before using this blood collection device, these four parts are separated from each other except that the needle sleeve 3 is connected to the puncture needle 1. When performing a blood collection operation, the connecting cover 4 is first connected to the collection tank 5, and then the connecting cover 4 is connected to the puncture needle 1 through the collection tank 5 to complete the assembly;

[0033] When in use, when pinching the connecting cover 4 by hand, it is convenient to perform a puncture action on the skin, and the collection tank 5 is held by the ring finger and the little finger. In this posture, the blood collection needle tube 105 can pierce the skin at a smaller angle to collect blood, reducing the discomfort of the patient, and the effect is better. A dial 2 is also fixed on the needle tip 101 of the puncture needle 1. The dial 2 is symmetrically arranged to increase the stability during the puncture process and is also convenient for fixing the puncture needle 1 after piercing the skin when needed.

[0034] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A blood sampling device for hemodialysis, characterized in that: include: A puncture needle (1), a connecting cover (4) and a collecting tank (5); The connecting cover (4) is used to connect the puncture needle (1) and the collecting tank (5); The puncture needle (1) comprises a needle (101) and a blood collection needle tube (105); the connection cover (4) is mounted on the needle (101) in a vertical direction relative to the axis of the blood collection needle tube (105); during blood collection, blood enters the needle (101) through the blood collection needle tube (105) and then enters the collection tank (5) along a first direction through the connection cover (4).

2. A blood sampling device for hemodialysis according to claim 1, characterized in that: A lumen (102) is formed at one end of the needle (101), and one end of the blood collection needle tube (105) is installed in the lumen (102). A protrusion (103) is provided at the connection between the needle (101) and the connection cover (4), and a through hole penetrating the blood collection needle tube (105) is provided in the middle of the protrusion (103).

3. A blood sampling device for hemodialysis according to claim 1, characterized in that: The blood collection needle tube (105) is connected to a connecting needle tube (104) which is consistent with the axis of the through hole, and the blood collection needle tube (105) is connected to the collection tank (5) through the connecting needle tube (104).

4. A blood sampling device for hemodialysis according to claim 2, characterized in that: A sealing plug (401) is provided at the bottom of the connection cover (4); the cross section of the through hole is in a conical shape that is wide at the top and narrow at the bottom; the sealing plug (401) is interference-connected with the inner wall of the raised portion (103).

5. A blood sampling device for hemodialysis according to claim 1, characterized in that: A hollow connecting column (402) is arranged on the top of the connecting cover (4), a sealing diaphragm (403) is arranged inside the hollow connecting column (402), and a chamber is formed between the sealing diaphragm (403) and the top wall of the hollow connecting column (402).

6. A blood sampling device for hemodialysis according to claim 3, characterized in that: The collecting tank (5) comprises a bottle body (501), wherein the bottle body (501) is screwed to a hollow connecting column (402) in a direction perpendicular to the first direction, wherein an air bladder (503) is arranged at the mouth of the bottle body (501), the air bladder (503) is located in a chamber, the interior of the air bladder (503) is hollow, and the connecting needle tube (104) is connected to the bottle body (501) after continuously piercing the sealing membrane (403) and the air bladder (503).

7. A blood sampling device for hemodialysis according to claim 6, characterized in that: The bottle body (501) is provided with an air connection pipe (502) which is in communication with the interior of the bottle body (501).

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