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Test Listing: PARTIAL THROMBOPLASTIN TIME



Code 1403
Test or Panel Test
Name PARTIAL THROMBOPLASTIN TIME
Specimen Type Blue top tube (buffered sodium citrate)
Preferred Volume 2 mL
Minimum Volume (Emergencies only) 1 mL
Patient Prep N/A
Collection Procedure Liquid blue top tube filled to capacity. Must be performed within 4 hours of specimen collection.
Specimen Processing Assays on nonheparinized patients must be performed within 4 hours of collection. Assays on specimens suspected to contain unfractionated heparin therapy should be centrifuged and the plasma removed from the cells within 1 hour of collection and tested within 4 hours of collection. If time interval between drawing and testing exceeds 4 hours, centrifuge specimen, separate plasma, recentrifuge, separate into plastic tube, and freeze at -20C or less
Storage and Transport Frozen
Stability N/A
Unacceptable Condition Severely hemolyzed; clotted samples; inappropriately filled liquid blue top tubes; specimens more than 4 hours old that have not been separated; frozen at -20C or less
Alternate Specimens N/A
Limitations N/A
CPT Codes 85730
Interface Order Code 1403
Testing Schedule Mon-Fri
Available STAT? Yes
Turnaround Time 24 Hours
Methodology Electromechanical
Alias PTT
Synonyms Partial Thromboplastin Time; APTT

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