ARUP's Laboratory Test Directory

0030162: Partial Thromboplastin Time with Reflex to PTT 1:1 Mix

Test Mnemonic: PTT/MIX
Methodology: Electromagnetic Mechanical Clot Detection

Performed: Mon-Sat

Reported: 1-2 days

Specimen Required:  
Collect: One 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: 1.5 mL platelet-poor plasma (lt. blue, sodium citrate), frozen. (Min: 1 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 1 mL platelet-poor plasma (lt. blue, sodium citrate), frozen.

Unacceptable Conditions: Serum.  Nonfrozen or hemolyzed specimens.

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
 

Note:
If PTT is elevated, then PTT 1:1 mix will be added. Additional charges may apply.

CPT Code(s):
85730 PTT; if reflexed add 85732 PTT 1:1 mix