Safety vein blood taking needle

Abstract

The utility model provides a safe vein blood taking needle which comprises a needle base and a needle core. The needle seat comprises a main pipe and a branch pipe; a fin is formed on the outer side of the first end of the main pipe; the manifold communicates with the main pipe and is formed on the downstream of the fins; the needle core comprises a first section and a second section; the diameter of the first section is greater than that of the second section; the middle of the first section forms a hollow section; the first end of the first section is a solid tip; the second end of the first section is integrally connected with the first section of the second end; a stopper is formed at the second end of the second section; a first through hole is formed in the first end of the hollow section; a second through hole is formed in the second end of the hollow section; the needle core is mounted in the main tube of the needle seat; in the first state, the tip of the first end of the first section of the needle core is located outside the first end of the main tube. The stopper at the second end of the second section of the needle core is positioned outside the second end of the main tube; in the second state, the first end of the first section of the needle core retreats into the main tube, so that the tip end of the first section of the needle core is located in the main tube.

Description

Technical Field

[0001] The present application relates to a blood collection needle, and in particular to a safe venous blood collection needle. Background Art

[0002] The venous blood collection needle, also called the scalp needle, is widely used because of its simple structure and easy operation. After use, the needle tip of this venous blood collection needle is exposed, which can easily cause needlestick injuries.

[0003] Therefore, CN 211024526 U proposes a "scalp needle for preventing needle stick injuries", which prevents accidental needle stick injuries by connecting the needle cap integrally and putting the needle cap back on. However, the back-covering action itself is a link that easily causes needle stick injuries. Utility Model Content

[0004] In view of the above problems, the present application aims to propose a safe venous blood collection needle, which can hide the needle tip and avoid needlestick injuries without the need for a re-sheathing action.

[0005] The safe venous blood collection needle of the present application comprises: a needle seat and a needle core;

[0006] The needle seat includes a main pipe and a manifold; a wing is formed on the outer side of the first end of the main pipe; the manifold is connected to the main pipe and is formed downstream of the wing; a retaining ring extending inwardly is formed on the second end of the main pipe;

[0007] The needle core comprises a first section and a second section; the diameter of the first section is larger than the diameter of the second section; a hollow section is formed in the middle of the first section; the first end of the first section is a solid tip; the second end of the first section is integrally connected with the first section of the second end; a stopper is formed at the second end of the second section; a first through hole is formed at the first end of the hollow section; and a second through hole is formed at the second end of the hollow section;

[0008] The needle core is installed in the main tube of the needle seat;

[0009] In the first state, the tip of the first end of the first section of the needle core is located outside the first end of the main tube, and the first through hole of the hollow section is exposed outside the first end of the main tube, and the second through hole of the hollow section is directly opposite to the manifold so that the hollow section is connected to the manifold; the stopper of the second end of the second section of the needle core is located outside the second end of the main tube; the inner wall of the main tube and the outer peripheral surface of the first section of the needle core are in contact to form a seal, and there is a predetermined friction force between the inner wall of the main tube and the outer peripheral surface of the first section of the needle core, so that the tip of the needle core can complete the work of puncturing the vein;

[0010] In the second state, the first end of the first section of the needle core retreats into the main tube, so that the tip of the first section of the needle core is in the main tube; the second section of the needle core is drawn out from the center of the retaining ring; and the second end of the first section of the needle core is blocked by the retaining ring.

[0011] Preferably, the stopper is formed as a circular segment-shaped plate.

[0012] Preferably, the main pipe and the manifold fins are on the same horizontal plane.

[0013] Preferably, the first through hole passes through the upper part and the lower part of the hollow section.

[0014] Preferably, the first through hole is formed as an elongated hole along the length direction of the first section of the needle core.

[0015] The safe venous blood collection needle of the present application does not need to be put back on the needle cap. After blood collection, the needle can be directly pulled back into the main tube to avoid accidental needle stick injuries caused by the exposure of the tip. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the safety venous blood collection needle of the present application in the first state;

[0017] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of a safety venous blood collection needle;

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the safety venous blood collection needle of the present application in the second state;

[0019] Figure 4 for Figure 3 A schematic cross-sectional structure diagram of a safety venous blood collection needle;

[0020] Figure 5 This is a schematic diagram of the top view of the needle holder of the safety venous blood collection needle of the present application;

[0021] Figure 6 for Figure 5 A schematic cross-sectional structure diagram of a needle seat;

[0022] Figure 7 This is a schematic diagram of the three-dimensional structure of the pillow core of the safety venous blood collection needle of the present application;

[0023] Figure 8 for Figure 7 A schematic diagram of a cross-sectional structure of a pillow core;

[0024] Fig. 9 for Figure 7 A schematic diagram of the main structure of the stopper of the pillow core. DETAILED DESCRIPTION

[0025] The safety venous blood collection needle of the present application is described in detail below in conjunction with the accompanying drawings.

[0026] The safety venous blood collection needle of the present application comprises: a needle seat 10 and a needle core 20 .

[0027] The needle seat is made of medical plastic with a certain rigidity. The needle seat includes a main tube 11 and a manifold 13; a wing 12 is formed on the outer side of the first end of the main tube 11, and the wing 12 can be formed on both sides or only on one side. The manifold 13 is connected to the main tube 11 and is formed downstream of the wing 12; a retaining ring 14 extending inward is formed at the second end of the main tube 11.

[0028] The needle core 20 is a steel needle. The needle core 20 includes a first section 21 and a second section 22; the diameter of the first section 21 is larger than the diameter of the second section 22; a hollow section is formed in the middle of the first section 21; the first end of the first section 21 is a solid tip for puncturing a vein; the second end of the first section 21 is integrally connected with the first section of the second end 22; a stopper 25 is formed at the second end of the second section 22; a first through hole 23 is formed at the first end of the hollow section; and a second through hole 24 is formed at the second end of the hollow section.

[0029] The needle core 20 is installed in the main pipe of the needle hub 10 .

[0030] The first state of the safety venous blood collection needle of the present application is as follows Figure 1 , 2 As shown, the second state is shown in Figures 3 and 4.

[0031] In the first state, the tip of the first end of the first section 21 of the needle core 20 is located outside the first end of the main tube 11, and the first through hole 23 of the hollow section is exposed outside the first end of the main tube 11, and the second through hole 24 of the hollow section is opposite to the manifold 13 so that the hollow section is connected to the manifold 13; in this way, after the tip punctures the vein and enters the vein, blood enters the hollow section through the first through hole 23, then flows into the manifold 13 through the second through hole 24, and flows into the corresponding blood sample holding device through the manifold 13.

[0032] The stopper 25 at the second end of the second section of the needle core 20 is located outside the second end of the main tube 11; the inner wall of the main tube 11 contacts the outer peripheral surface of the first section 21 of the needle core 20 to form a seal, so that blood will not flow to other places from the gap between the main tube and the needle core; there is a predetermined friction force between the inner wall of the main tube 11 and the outer peripheral surface of the first section 21 of the needle core 20, so that the tip of the needle core 20 can complete the work of puncturing the vein and will not retreat during puncture.

[0033] In the second state, the first end of the first section 21 of the needle core 20 retracts into the main tube 11, so that the tip of the first section 21 of the needle core 20 is inside the main tube 21, that is, the tip is hidden and avoids exposure; the second section 22 of the needle core 20 is pulled out from the center of the retaining ring 14; the second end of the first section 21 of the needle core 20 is blocked by the retaining ring 14.

[0034] The stopper 25 is formed as a circular plate. When in use, one side of the notch can be towards the skin surface of the patient.

[0035] The main pipe 11, the manifold 13 and the wing 12 are on the same horizontal plane, so that they can be conveniently fixed on the patient's skin surface using a medical adhesive tape when necessary.

[0036] The first through hole 23 penetrates the upper and lower parts of the hollow section, which can increase the inlet area of ​​blood entering the hollow section, making it easier for blood to quickly enter the manifold and eventually enter the blood sample container.

[0037] The first through hole 23 is formed as an elongated hole along the length direction of the first section 21 of the needle core 20 . This design is also for increasing the inlet area.

[0038] When in use, the safety venous blood collection needle of the present application is in the first state. The user pinches the wing to perform venous puncture, so that the tip of the first section of the needle core pierces the vein; the blood in the vein enters the hollow section through the first through hole, and then flows out of the hollow section through the second through hole, enters the first end of the manifold opposite to the second through hole, and enters the blood sample container connected to the manifold along the manifold. Of course, the second end of the trachea can be provided with a joint, etc., which is not the focus of the present application. In this regard, the same setting as the prior art can be adopted. After the blood collection is completed, the user presses the hemostatic cotton ball above the puncture point with one finger, and a finger against the rear end of the wing to prevent the needle seat from moving. The other hand pinches the stopper to withdraw the needle core, so that the first section of the needle core is completely retracted into the main tube to avoid the tip being exposed and causing accidental needle puncture injuries; the diameters of the first section and the second section of the needle core are different, and a step is formed at the connection, which will be blocked by the stopper ring, so that the needle core can be prevented from being completely withdrawn from the main tube.

Claims

1. A safe venous blood collection needle, characterized in that include: Needle seat, needle core; The needle seat includes a main pipe and a manifold; a wing is formed on the outer side of the first end of the main pipe; the manifold is connected to the main pipe and is formed downstream of the wing; a retaining ring extending inwardly is formed on the second end of the main pipe; The needle core comprises a first section and a second section; the diameter of the first section is larger than the diameter of the second section; a hollow section is formed in the middle of the first section; the first end of the first section is a solid tip; the second end of the first section is integrally connected with the first section of the second end; a stopper is formed at the second end of the second section; a first through hole is formed at the first end of the hollow section; and a second through hole is formed at the second end of the hollow section; The needle core is installed in the main tube of the needle seat; In the first state, the tip of the first end of the first section of the needle core is located outside the first end of the main tube, and the first through hole of the hollow section is exposed outside the first end of the main tube, and the second through hole of the hollow section is directly opposite to the manifold so that the hollow section is connected to the manifold; the stopper of the second end of the second section of the needle core is located outside the second end of the main tube; the inner wall of the main tube and the outer peripheral surface of the first section of the needle core are in contact to form a seal, and there is a predetermined friction force between the inner wall of the main tube and the outer peripheral surface of the first section of the needle core, so that the tip of the needle core can complete the work of puncturing the vein; In the second state, the first end of the first section of the needle core retreats into the main tube, so that the tip of the first section of the needle core is in the main tube; the second section of the needle core is drawn out from the center of the retaining ring; and the second end of the first section of the needle core is blocked by the retaining ring.

2. The safety venous blood collection needle according to claim 1, characterized in that: The stopper is formed as a circular segment-shaped plate.

3. The safety venous blood collection needle according to claim 1, characterized in that: The main pipe and the manifold fins are on the same horizontal plane.

4. The safety venous blood collection needle according to claim 1, characterized in that: The first through hole penetrates the upper part and the lower part of the hollow section.

5. The safety venous blood collection needle according to claim 1, characterized in that: The first through hole is formed as an elongated hole along the length direction of the first section of the needle core.

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