Prothrombin Time/International Normalized Ratio : ARUP Lab Tests

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Prothrombin Time/International Normalized Ratio : 0030224

Mnemonic: PT INR

Methodology:	Electromagnetic Mechanical Clot Detection
Performed:	Sun-Sat
Reported:	1-2 days
Specimen Required:	Collect: Lt. blue (sodium citrate). Specimen Preparation: Transfer 1 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: Frozen. Unacceptable Conditions: Serum. Non-frozen, clotted, or hemolyzed specimens. Stability (collection to initiation of testing): Ambient: 24 hours; Refrigerated: 24 hours; Frozen: 1 week

Reference Interval:

Test Number	Components	Reference Interval
	International Normalized Ratio	Coumadin Therapy: INR: 2.0-3.0 conventional anticoagulation INR: 2.5-3.5 intensive anticoagulation
	Prothrombin Time	12.0-15.5 seconds

Note:

Reference intervals established using 3.2% sodium citrate.

CPT Code(s):

85610

Cross References:

INR (Prothrombin Time/International Normalized Ratio), Protime, PT/INR (Prothrombin Time/International Normalized Ratio), PT/International Normalized Ratio (Prothrombin Time/International Normalized Ratio)

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