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HelpPTT*
Specimen Requirements
Specimen Type: Whole blood
Container/Tube: Light-blue top (citrate)
Specimen Volume: Tube must be filled to the acceptability line
Specimen Minimum Volume: 2.7 mL
Specimen Stability: 4 hours ambient
Collection Instructions:
1. Tube must be full. (Do not underfill or overfill tube.)
2. Send specimen Room Temperature in original tube. Stable 4 hours
Specimen Transport Temperature
Room Temperature 4 hours.
*For longer transport times, double spun, platelet poor plasma must be submitted refrigerated or frozen. Contact lab for procedure.
Day(s) Performed
Daily
Analytical Time:
1 day
Available Stat
Performing Laboratory
Rutland Regional Medical Center Laboratory
Methodology
ACL Tops 350
Normal Reference Values
23.0-37.0 seconds
Test Classification and CPT Coding
85730
Additional Information
The aPTT test is used for baseline PTT studies and routine coagulation screening.
NOT to be used in the monitoring of heparin therapy.
Whole blood specimen is stable at room temperature 4 hours. For longer transport times, double spun, platelet poor plasma must be submitted refrigerated or frozen. Contact lab for procedure.