ARUP's Laboratory Test Directory

Inhibitor Assay, PTT with Reflex to PTT 1:1 Mix 2-Hour Incubation : 0030169

Mnemonic: INHIB PTT

Methodology: Electromagnetic Mechanical Clot Detection
Performed: Mon-Fri
Reported: 1-4 days
Specimen Required: Collect:  Two 5 mL lt. blue (sodium citrate).  Refer to the Hemostasis/Thrombosis Specimens section in the front of this User's Guide for specimen collection instructions.

Transport:  3 mL platelet-poor plasma, frozen. (Min: 2 mL) Submit specimen in an ARUP Standard Transport Tube.

Unacceptable Conditions:  Serum.  Hemolyzed specimens.  Specimens refrigerated more than four hours.

Stability:  Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 1 week
Reference Interval:
 
Test Number Components Reference Interval
0030235Partial Thromboplastin Time 24-35 seconds
 Partial Thromboplastin Time 1:1 Mix (performed if PTT > 35 seconds) By report
 Partial Thromboplastin Time 2-hr Incubation Not established
 Partial Thromboplastin Time 2-hr Incubation 1:1 Mix Not established
 Interpretation, Coag By report

Note: Reference interval established using 3.2% sodium citrate.

If PTT is elevated, then PTT 1:1 mix will be added. If PTT 2-hr incubation is elevated then PTT 1:1 mix with 2-hr incubation will be added.
CPT Code(s): 85730 x2 PTT; if reflexed, add 85732 each PTT 1:1 mix
 
 

 

 

 
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