MIXING STUDY

Specimen Required
Draw blood in 2 light blue 3.2% sodium citrate tubes. See appendices for coagulation test collection instructions. Send 3.0 mL coagulation test collection instructions. Send 3.0 mL plasma (1.5 mL minimum) frozen in a screw-capped plastic vial.

Rejection Criteria
Thawed plasma, clotted sample, serum

Methodology
Clot Detection

Stability
Room Temperature: Unacceptable, Refrigerated: Unacceptable, Frozen: 7 days

Reference Range
By report

Performed
Monday-Friday

Turnaround Time3-5 days
Test CodeMIXQ
CPT-4 Code (s)
85610, 85730, plus others if reflex testing is performed, at additional cost
LOINC Codes
Interpretation   15159-7  
Prothrombin time   5902-2  
PTT-LA   34571-0  

Warde
Medical
Laboratory