ARUP's Laboratory Test Directory

Partial Thromboplastin Time : 0030235

Mnemonic: PTT

Methodology: Electromagnetic Mechanical Clot Detection
Performed: Sun-Sat
Reported: 1-2 days
Specimen Required: Collect:  One 5 mL lt. blue (3.2% sodium citrate).

Storage/Transport Temperature:  1 mL platelet-poor plasma (lt. blue, 3.2% sodium citrate), frozen. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.

Remarks:  Separate plasma from cells ASAP and freeze for transport.

Unacceptable Conditions:  Serum, clotted or hemolyzed specimens. Specimens ambient or refrigerated greater than four hours.

Stability (collection to initiation of testing):  Ambient: 4 hours; Refrigerated: 4 hours; Frozen: 1 week
Reference Interval:
24-35 seconds
Note: Reference interval established using 3.2% sodium citrate.
CPT Code(s): 85730
Cross References: PTT
 
 

 

 

 
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