A blood extraction device for medical examination
A blood and medical technology, applied in the field of medical testing, can solve the problems of blood collection needles, air pollution, etc.
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Embodiment 1
[0035] refer to Figure 1-3 , a blood extraction device for medical examination, comprising a drainage tube 1, a needle tube 2 and a connecting device, the connecting device is connected to the drainage tube 1 and the needle tube 2 to discharge the air in the drainage tube 1 and the needle tube 2. During blood sampling, the drainage tube 1 is connected to the blood collection tube, and the needle tube 2 is used for blood collection. Before blood collection, the air in the drainage tube 1 and the needle tube 2 can be discharged through the connecting device to prevent air impurities from contaminating the blood collection sample and infecting the blood collection. By.
Embodiment 2
[0037] Further, on the basis of the above-mentioned embodiment, this embodiment is as follows: Figure 2-8 As shown, the connection device includes a casing 3 and a corrugated tube 6, the drainage tube 1 and the needle tube 2 are fixed on the casing 3, one end of the corrugated tube 6 is fixed on the needle tube 2, and the other end is fixed with a sliding sleeve 5, A sliding pipe 4 is fixedly connected to the casing 3, one end of the sliding pipe 4 is communicated with the drainage pipe 1, and the other end is slidably fitted in the sliding sleeve 5;
[0038] The bellows 6 is fixedly connected with a hose 7, one end of the hose is communicated with the sliding sleeve 5, and the other end is communicated with the needle tube 2, so that a accommodating cavity is formed between the outer wall of the hose 7 and the inner wall of the bellows 6, and the accommodating cavity is filled with For nitrogen, a one-way valve 601 is provided on the end face of the bellows 6 , and a pressur...
Embodiment 3
[0043] Further, on the basis of Embodiment 1 or 2, this embodiment is provided with a hemostatic structure on the casing 3, such as Figure 3-14As shown, the hemostatic structure includes an annular gasket 22, the gasket 22 is made of a deformable material, the gasket 22 is slidably sleeved on the needle tube 2, an annular elastic tape 24 is fixed on the gasket 22, and the outer edge of the elastic tape 24 is fixed. A plurality of top blocks 23 are fixedly connected, the top blocks 23 are provided with through holes, and the ropes 30 connected end to end are inserted through the through holes, and the gasket 22 is provided with a plurality of openings 31, and a slider is slidably fitted in the openings 31. 26. A wedge-shaped first block 28 is fixed in the opening 31, a wedge-shaped second block 27 is fixed on the slider 26, and the first block 28 is matched with the second block 27. The sleeve 29 is fixed, the sleeve 29 is sleeved on the rope 30, the slider 26 is fixed on the ...
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