SEQUENCE OF FILLING OF TUBES FOR HEMOTOLOGICAL INVESTIGATIONS
SEQUENCE OF FILLING OF TUBES
Following order of filling of tubes should be followed after withdrawal of blood from the patient if multiple investigations are ordered:
- First tube: Blood culture.
- Second tube: Plain tube (serum).
- Third tube: Tube containing anticoagulant (EDTA, citrate, or heparin).
- Fourth tube: Tube containing additional stabilizing agent like fluoride.
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