Prothrombin Time & Activated PTT
Centralized Core Laboratory:Hematology
Blue top (sodium citrate) tube
2.7 mL (minimum 1.8 mL)
Must use appropriate sodium citrate tube based on volume of blood drawn (1.8 mL or 2.7 mL tube)
Cause for rejection:
Samples hemolyzed, clotted, diluted with IV fluid; contaminated with heparin; improperly filled; not kept on ice; received > 1 hr after drawn
Daily, 24 hours; STAT
Indicate clearly if a specimen has been drawn from an arterial line or from a line that has been rinsed with heparin. This information is absolutely essential to the CCL personnel for proper handling of the specimen and the reporting of results. Please indicate if the patient is currently receiving anticoagulant therapy.
If collected at an offsite location, send by a STAT Courier to Akron Children's Hospital lab.
Reference ranges: PT 8.5-14.0 secs; APTT < 40 secs
PT & PTT; Protime & APTT