Whole blood in a Lavender top tube [EDTA].
Onsite [NJH]: Transport to lab within 1 hour.
Do not centrifuge.
Preferred volume: 4 mL whole blood
Minimum volume: 1 mL whole blood
Clotted specimens will be rejected.
Offsite: Send whole blood Priority Overnight via FedEx and in a well insulated container on an ice pack. DO NOT freeze sample.
Specimen must be received in the laboratory within 24 hours of collection.
Stability after cell separation
4 hours at RT (15-25°C)
24 hours refrigerated at (2-8°C)
4 weeks frozen at ≤ - 20°C
Make sure light blue top tube is filled properly to assure proper ratio of anticoagulant to whole blood.
Monday - Friday
1 hour STAT or routine
Age ≤50 years : D-Dimer, quantitative: <0.50 ug/mL FEU
Age >50 years : PE/DVT Index: Normal
For patients greater than 50 years old, age adjusted cutoff interpretation is applied using the calculation: age x 0.01 ug/mL FEU and reported as a qualitative PE/DVT index (Normal/Abnormal) with regards to exclusion for suspected thrombosis. Patients 50 years or older have an association with increased diagnostic yield of non-specific D-Dimer.