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Also, it is not useful for enzymatic tests. However, the EDTA blood is not useful for the measurement of the divalent ions such as calcium and magnesium.
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Else, there can be chances of cross-contamination. However, the same needle should not be used to draw a sample from different patients. The sizes of the needle generally range from 1 to 1.5 inches with the gauge value ranging from 19 to 22.Ī single needle can be used to draw blood from a patient multiple times. Vacutainer Needle Vacutainer Needle PartsĪ vacutainer needle is a type of needle, that is used to draw blood from the patient.Īs shown in the figure, the major components of the vacutainer needles are the bevel, shaft, threaded tub, and rubber sleeve covering the needle. EDTA Tube (Ethylene Diamine Tetra Acetic Acid)