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HEPARINASE TREATED ACTIVIATED PARTIAL THROMOBOPLASTIN TIME
Test CodeLAB30474
CPT Codes
85525
Includes
aPTT on plasma that has had heparin contamination removed or reduced.
Preferred Specimen
One 3 mL light blue top tube
Pediatric Volume: One 1.8 mL pediatrci blue top tube
Pediatric Volume: One 1.8 mL pediatrci blue top tube
Minimum Volume
Required for Testing: 1 mL plasma
Instructions
Tube must be filled to etched line to perform testing.
Samples must be centrifuged at 3000rpm for 10 mins. Centrifugation faster than 3000rpm may cause erroneous results. Plasma should be aliquoted into 1mL vials. Freeze within one hour of collection. Samples must remain frozen during transport. Any samples that are received thawed are not suitable for testing.
Samples must be centrifuged at 3000rpm for 10 mins. Centrifugation faster than 3000rpm may cause erroneous results. Plasma should be aliquoted into 1mL vials. Freeze within one hour of collection. Samples must remain frozen during transport. Any samples that are received thawed are not suitable for testing.
Transport Temperature
Ambient: < 1 hour after collection
Frozen: > 1 hour after collection (two 1 mL plasma aliquots)
Frozen: > 1 hour after collection (two 1 mL plasma aliquots)
Specimen Stability
Ambient: 4 hours Frozen (-20° C): Aliquot plasma sample if not within 4 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Clotted sample, underfilled tube, gross hemolysis
Methodology
Optical Density
Setup Schedule
Sunday-Saturday
Performing Laboratory
West Virginia University Hospital, Inc.
