Blood collecting instrument, blood collecting method and hemostix thereof

Abstract

The invention discloses a hemostix which comprises a blood collecting joint, a blood drawing needle, an air exhausting needle and a blood discharging needle. The blood drawing needle is arranged on a blood drawing interface of the blood collecting joint. An installation hole is formed in a blood discharging and air exhausting interface, and an exhaust vent is formed in an air exhaust interface; the blood discharging needle penetrates through the air exhausting needle and is communicated with a blood through cavity, the inner diameter of the air exhaust needle is larger than the outer diameter of the blood discharging needle to form a ventilation channel communicated with the exhaust vent, and a bonding point is arranged at the opening of the ventilation channel. Due to the fact that the air exhausting needle and the blood discharging needle are coaxially arranged, only one wound is formed when the hemostix is inserted into a blood collecting tube, and the extrusion distance on the periphery of a sealing opening of the blood collecting tube in the stage of transition from the blood discharging needle to the air exhausting needle is balanced. The operation convenience can be achieved, the syringe needle can be effectively prevented from being inserted into the inner wall of the blood collecting tube, the stress phenomenon caused when the hemostix is inserted into the sealing opening of the blood collecting tube is improved, the hemostix can be effectively prevented from being polluted, and the safety and reliability are remarkably improved. The invention further provides a blood collecting instrument applying the hemostix and a blood collecting method.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a blood collection device for collecting clean blood from a vein. The present application also relates to a blood collection instrument using the above-mentioned blood collection device for blood collection. [0002] In addition, the present application also relates to a blood collection method using the above-mentioned blood collection device to collect clean blood. Background technique [0003] In the existing blood collection process, one end of the blood collection needle is inserted into a human vein, and the other end is inserted into a blood collection tube preset with negative pressure. Due to the negative pressure of the blood collection tube, blood automatically flows into the blood collection tube. However, the blood collection tubes with preset negative pressure cannot accurately control the blood collection volume during blood collection. Risk of ...

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Problems solved by technology

However, in practice, the inventors found that the product adopting this technical solution has at least the following technical problems in use: 1). When the aforementioned product is inserted into a blood collection tube, the distance between the blood-ejecting needle and the air-absorbing needle is relatively large (3-3.5mm) , plus the diameter of the two needles themselves, the maximum lateral distance on the cross section will be larger. Therefore, when inserting the blood collection tube, special attention should be paid not to insert the needle into the inner wall of the blood collection tube, otherwise it will easily damage the blood collection tube. Pollution in the tube; 2). Due to the large distance between the blood evacuation needle and the suction needle (3-3.5mm) of the aforementioned products, and the needles are one in front of the other, when inserted into the blood collection tube, the force will have a sudden change, so that the operation Or it is easy to vibrate and cause deflection during the insertion operation, which may cause the needle to be inserted into the inner wall of the blood collection tube

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