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HelpTest Code PTT Partial Thromboplastin Time
Specimen Type
Plasma
Container
Blue Sodium Citrate
Minimum Volume
Filled to indicated line (2.7 mL)
Pediatric minimum: 1 light blue top tube filled to line (1.8 mL)
Stability
4 hours at 20-25°C/2 weeks at -20°C
Transfer Instructions
Centrifuge. Remove plasma from cells. Transport separated plasma at -20°C.
Rapidly thaw specimen at 37°C and gently mix prior to testing.
Expected Turn Around Time
STAT/ASAP: 1 hour
CPT
85730
Result Information
| Result Code | Result Name |
| PTT | PTT |
Special Instructions
Tube must be filled to the indicated line. Over or underfilled specimens cannot be tested.