Yale New Haven Hospital

Department of Laboratory Medicine
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Mixing study PT

Lab Section: 

Coagulation

 

Lab Location: 

Main Lab

Test ID: 

LAB3262

 

Synonyms:

MPT

 

Methodology: 

Clotting

Schedule: 

Mon-Fri Days or with approval

Reported: 

3 5 days

Specimen Requirements: 

Collection: 2.7 mL Blood in a Blue Top Tube.
Pediatric volume: 2.7 mL.
Collect 2 full sodium citrate (blue top) tubes
Transport: Whole blood may be transported at ambient or refrigerated temperature. Separated plasma, not yet frozen, may be transported at refrigerated temperature, while frozen plasma should be sent on dry ice to prevent thawing in transit.
Unacceptable conditions: QNS, Overfilled; clotted

 

Notes: 

Clinical Indications: In the investigation of a prolonged PT, a mixing study may help differentiate between the presence of a circulating inhibitor and a factor deficiency.

Tests in this Panel: 

Test Name

Reference Interval

PT 1:1 Mix 0" [LRR15850]

Age Limit

Sex

Normal Range

0 - 999 Years

Any

9.0

14.0 seconds

PT 1:1 Mix 60" [LRR15852]

Age Limit

Sex

Normal Range

0 - 999 Years

Any

9.0

14.0 seconds

CPT Code(s): 

85611

Last Changed: 

8/17/2017 1:06 PM

Last Reviewed: 

8/17/2017 1:07 PM