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How do you collect blood into the Microhematocrit Tubes properly?

A. Submerge the tubes in water
B. Shake the tubes vigorously
C. Fill the tubes using capillary action
D. Pour blood directly into the tubes

Answer :

Final answer:

Microhematocrit tubes are filled with blood using capillary action, without shaking or direct pouring, and capping and mixing the samples gently as required for the analysis. The correct answer is option C.

Explanation:

To properly collect blood into the Microhematocrit Tubes, you should fill the tubes using capillary action. This process involves gently touching one end of the microhematocrit tube to the blood droplet, allowing the blood to be drawn up into the tube by capillary action without shaking or direct pouring. To ensure an accurate sample and analysis, do not submerge the tubes in any liquid, shake them vigorously, or pour blood directly into the tubes, as these actions could disrupt the blood sample's integrity.

After filling the tube to the correct height as recommended by your instructor or reference material, cap the tube tightly and mix by gentle inversion if necessary. Some procedures may require the blood-filled tubes to be centrifuged to separate different components, such as in the case when a laboratory technician collects a blood sample in a glass tube and then harvests serum after about an hour for further analysis.

The proper way to collect blood into Microhematic Tubes is by filling the tubes using capillary action. Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity. In the case of blood collection, this happens when the open end of the capillary tube is touched to the blood sample, and the blood is drawn into the tube.

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