<prompt> what is the anticoagulant of choice in electrolyte estimation ?lithium heparintrisodium citrateEDTAall of the above  <response>: Anticoagulant : Is a substance that prevents blood from coagulation or clotting. The most common anticoagulants used in hematology are: 1. EDTA: Ethylen Diamine Tetraacetic acid -CBC , RBC MORPHOLOGY 2. Sodium citrate - FOR COAGULATION STUDIES 3. Heparine -ABG ELECTROLYTES, IMMUNOPHENOTYPING ,LEUKOCYTE FUNCTION DEFECT , OSMOTIC FRAGILITY TEST REF : ROBBINS 10TH ED 