Blue top (sodium citrate) tube
Cause for rejection:
Sample hemolyzed, clotted, diluted with IV fluid; contaminated with heparin; improperly filled; not kept on ice; received 1 hr after drawn
Daily, 24 hours; STAT
Optical Light Scatter Detection Clotting Assay (Clauss)
Indicate clearly if a specimen has been drawn from an arterial line or from a line that has been rinsed with heparin. Please indicate if the patient is currently receiving anticoagulant therapy.
For offsite locations, call a STAT courier for specimen to be delivered to laboratory. Specimen is only stable for 1 hour.
Reference range: 170-410 mg/dL
Clottable Fibrinogen; Factor I