PROTHROMBIN TIME STUDIES
*Prothrombin Time (PT)*Prothrombin Ratio (PR)*International Normalised Ratio (INR)
3 mL Whole blood in 1 Blue Top (Sodium Citrate) tube. Mix thoroughly by inversion. Transport to Lab within 4 hrs. If this is not possible, make PPP within 1 hour of collection. FREEZE IMMEDIATELY. Ship frozen. DO NOT THAW. Overnight fasting is preferred. Duly filled Coagulation Requisition Form is mandatory.
Photo-optical Clot Detection
Sample by 1pm
Report Same Day Evening