This light blue top sodium citrate tube, or Coagulation Tube, is used for examination of coagulation parameters. Coagulation tubes contain a buffered sodium citrate solution.
For All coagulation study like PT, APTT, fibrinogen, FDP, D-dimer.
All Clotting factor Assay ( like factor VIII)
Lupus Anticoagulant of platelets on smear
In Case of EDTA induced Pseudo thrombocytopenia