Final answer:
Evacuated tubes with no additives are used for blood and plasma samples in certain tests. The tubes prevent clotting and help preserve the sample's integrity. K2EDTA is used to prevent coagulation and ensure accurate test results. erum is similar to plasma but without the clotting factors (fibrinogen).
Step-by-step explanation:
Evacuated tubes with no additives are used when the test to be performed involves blood samples or plasma samples. These tubes help prevent clotting and preserve the integrity of the sample during transportation and storage. The use of K2EDTA in the tubes helps prevent coagulation by binding to calcium, which is necessary for the clotting process. By using evacuated tubes with no additives, accurate test results can be obtained.
This is the liquid portion of the blood that remains after coagulation. Serum is similar to plasma but without the clotting factors (fibrinogen). It contains various proteins, electrolytes, hormones, and waste products. The solid portion consists of the formed elements (red blood cells, white blood cells, and platelets) and fibrin, which is the result of the clotting process. Various blood chemistry tests, including liver function tests, kidney function tests, lipid profiles, and glucose levels, often use serum samples. It's important to note that the choice of tube and additives depends on the specific requirements of the tests to be performed. Different tubes are designed to meet the needs of various laboratory analyses.
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