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HelpTest Code PTT aPTT
Abbrev
SQ=APTT
EPIC=LAB325
Storage Temperature
RT
ASTM/HL7/SDF 1
SQ=APTT
EPIC=LAB3041
Instrument/Location
Stago Compact Max
Specimen Requirements
Na Citrate/Blue tube
Specimen Transport Temperature
Whole Blood
Reference Values
51-74 Seconds
Critical Values: >100 seconds (on heparin)
Specimen Stability/Retention Time
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen platelet poor plasma: 2 weeks
NOTE: Specimens from patients on heparin must be centrifuged within 1 hour of collection and ambient stability is reduced to 2 hours.