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HelpTest Code APTT UMMC APTT, Plasma
Specimen Volume
2.7 mL
Preferred Specimen
Blue (BLU) Citrate
Specimen Handling Instructions
Deliver to lab within 4 hours of collection. Tube must be full.
Transport
Routine courier pick-up
Cutoff Time
None
Department
Hematology
Methodology
Photo-optical clot detection
Stat Turn-around Time
1 Hour
Routine Turn-around Time
1 Day
Reference Ranges
Critical >150 seconds
Normal values 25.1-36.5 seconds