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PTT, Heparinized patient
Test CodeLAB317
Alias/See Also
PTT Hep
CPT Codes
85730
Preferred Specimen
Blue Top (sodium citrate) tube
Minimum Volume
Full tube
Instructions
Fully collect a Blue Top (sodium citrate) tube. Underfilled tubes will not be accepted. Mix sample immediately by gentle inversion at least six times.
Transport Temperature
Room Temp
Specimen Stability
2 Hours
4 hrs. is when sample is collected using CTAD tube
4 hrs. is when sample is collected using CTAD tube
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Underfilled tubes
Reference Range
70-104 secondsĀ ; Critical value: Less than 64.9 or greater than 105.0 seconds
Additional Information
Guidelines for Hypercoagulable State Testing

