Prothrombin Time Mix (PT Mix)

Tube Type

Test ID		LAB5332
EPIC Order		EQUAL MIX PT/INR
CPT Code(s)		85611
Group/Individual Test		Individual
Laboratory		Core Laboratory
Tube Station		30 Routine: 888 STAT
Specimen	Routine:	2.7 mL blood/Lt Blue Sodium Citrate tube; See Comments
	Pediatric:	1.8 mL blood pediatric light blue top tube
Stability	Unspun:	4 hrs
	Room Temperature:	4 hrs
	Refrigerated:	NO
	Frozen:	14 days (platelet poor plasma only)
	Internal Reference Testing Specimen Handling Instructions:	Platelet Poor; Aliquot and Freeze within 4 hours.
Availability	Routine:	24 hr/day
	STAT:	N/A
Turnaround Time		2 hrs
Reference Range	Normal:	Interpretation
Comments	Deliver Immediately Should be Ordered on Same Sample as PT Draw tube must be allowed to fill completely. Short draws will be rejected.

Reviewed by J. Carr on November 20, 2025