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HelpTest ID BLOD0673 PTT
AKA
Activated Partial Thromboplastin Time, APTT
Specimen Type/Requirements
Blue top (Sodium Citrate) tube - platelet-poor plasma
Blue top (Sodium Citrate) tube - Whole Blood
Do not store in a frost-free freezer.
The 3.2% Sodium Citrate tube must be filled to appropriate volume to acquire the 9:1 blood to anticoagulant ratio that is critical for valid results.
Test is affected by hemolysis. Test is not affected by lipemia.
Specimen Volume
| Preferred Volume | 2.0 mL |
|---|---|
| Minimum Volume | 0.7 mL |
Stability/Transport
| Room Temperature | 4 hours | |
|---|---|---|
| Refrigerated | Not Acceptable | |
| Frozen | 14 days | Preferred for transport |
Plasma must be tested within 4 hours or freeze a platelet poor aliquot.
Performed Test Frequency
Monday through Sunday
Methodology
Mechanical Clot Detection
Performing Lab
Sanford Laboratories Sioux Falls
Sanford Laboratories Rapid City
CPT
85730