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Blue Top Citrate Tube
Specimen Requirements
Preferred:
Container/Tube: Blue Top Citrate Tube
Minimum Volume: 1 mL Citrated Plasma
Collection Instructions: Preference is a completely filled tube.
Also Acceptable:
Container/Tube: 2 mL and 3 mL pediatric tubes may also be drawn
Specimen Stability
Ambient: 24 hours
Refrigerate: 24 hours
Frozen: aliquot for longer storage. -20: 2 weeks or -70 6 months
Reference Range
BVH Lab:
8.8-11.6 sec
BFT Lab:
8.8-11.2 sec
Methodology
Fixed absorbance: Clotting Assay
CPT
85610
Test Alias
PTINR
PT
Protime
Lab Handling
Stable, centrifuged or uncentrifuged, at 2-4° C or 18-24° C for 24 hours if UNOPENED. The tube MUST be filled. For mixing studies contact Hematology.