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Test Code 0208868 Prothrombin Time (Protime), Plasma

Important Note

Specimen must arrive in laboratory within 24 hours of draw.

Methodology

Coagulometric (Turbidimetric) Measurement 
 

Performing Laboratory

Alomere Health Hospital Laboratory

Specimen Requirements

Specimen Type:  Plasma

Collection Container/Tube:  Blue top (3.2% sodium citrate)

Specimen Volume:  Tube must be filled completely to the stated draw volume.

Specimen Minimum Volume:  2 mL plasma

Collection Instructions:

1. Fill tube completely to stated draw volume (until vacuum is exhausted). 

2. If test is performed >4 hours of collection, double spin and send plasma frozen.

 

Rejection:

Hemolysis

Lipemia

Specimen Transport Temperature

Within 8 hours:  Ambient

>4 Hours:  Frozen - double spun

Reference Values

International Normalized Ratio (INR):  0.8-1.1

Critical Value (automatic call back):  >5

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

85610