Liquid sampling device, blood cell analyzer and medical equipment

Abstract

The application discloses a liquid sampling device, a blood cell analyzer and medical equipment. The liquid sampling device comprises a rack (9) and a sampling component mounted on the rack (9), wherein the sampling component comprises a swab (4) and a sampling needle (5) contained inside the swab (4); the liquid sampling device has a test tube placement position; the sampling component has a sampling position located above the tube placement position; the liquid sampling device further comprises a shielding component which comprises a bracket (8) and a baffle ring (7); the bracket (8) is fixed on the rack (9) and extends to the position between the sampling position and the test tube placement position; the baffle ring (7) is movably assembled on the bracket and has a floating gap (81) is reserved between the baffle ring (7) and the bracket (8); a guide hole (7a) through which the sampling needle (5) can penetrate is formed in the baffle ring (7), and the guide hole (7a) is shrunk from upside to downside. According to the liquid sampling device, the sampling needle can suck liquid successfully from a test tube, and blood-carrying bubbles in the test tube are prevented from entering the guide hole to pollute the swab.

Description

technical field [0001] The present application relates to the field of medical equipment, in particular to a liquid sampling device, a blood cell analyzer and medical equipment. Background technique [0002] When using a hematology analyzer for blood analysis, first draw a certain amount of blood from the test tube containing the blood sample through the sampling needle in the blood collection device, then transfer it to the top of the blood analysis pool, and drip the blood sucked by the sampling needle into the blood analysis pool. like figure 1 As shown, the blood collection device usually includes a straight cylindrical swab 4 for cleaning the sampling needle 5 and a baffle 3 for blocking the test tube 1. The sampling needle 5 is accommodated inside the swab 4, and if necessary, the inside of the swab 4 is injected with water or other The cleaning agent cleans the inner and outer surfaces of the sampling needle 5, and the baffle plate 3 is blocked at the bottom of the s...

AI Technical Summary

Problems solved by technology

However, when the sampling needle 5 is pulled out of the test tube 1, because the internal pressure of the test tube 1 is usually slightly greater than the atmospheric pressure, the bloody bubbles mixed with the blood sample and the gas sometimes emerge from the pierced needle port of the test tube cap 2, and these bloody bubbles Air bubbles are easy to get on the baffle plate 3. If the opening on the baffle plate 3 is relatively large, the bloody air bubbles can easily pass through the opening and stick to the bottom of the swab 4, thus polluting the swab 4.

like image 3 As shown, once the bottom of the swab 4 is stained with blood or a clot formed after blood coagulation, when the swab 4 moves to the top of the blood analysis tank 6, the blood or clot is likely to fall into the blood analysis tank 6. The analysis results are affected, resulting in a reduction in the accuracy of blood analysis or calibration

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