Advanced Diagnostic Laboratories

Collect

Blue top tube.

Specimen Preparation

Onsite [NJH]: Transport to lab within 1 hour.
Offsite: Separate plasma from cells within 2 hours by centrifuge and aliquot into a labeled polypropylene or similar plastic tube.
Preferred volume: 1 mL plasma

Pediatric Collection

Minimum volume: 0.5 mL

Unacceptable Conditions

Sample will be rejected if under-filled. Clotted and hemolyzed specimens will also be rejected.

Storage Transport Temp

Offsite: Frozen. Send plasma Priority Overnight via FedEx and in a well insulated container on dry ice.

Stability

Stability after cell separation:      
24 hours at RT (15-25°C ),       
refrigerated unacceptable,           
2 weeks frozen at  ≤ -20°C          
1 year frozen at  ≤ - 70°C

Notes

Make sure Blue top tube is filled properly to assure proper ratio of anticoagulant to whole blood.

Performed

Mon-Fri

Methodology

Chromogenic

Reported

4 hour routine, 1 hour STAT

Department

Core Lab

Synonyms

PTT;APTT

Reference Interval

Activated Partial Thromboplastin Time	Human
	Male	Female
	seconds
All Ages	23.9-30.7	23.9-30.7

CPT Code

85730