Activated Partial Thromboplastin Time (APTT) PTT
Method(s) | Clot Detection |
---|---|
Specimen Required | |
Collect | One adequately filled 3.0 mL light blue (sodium citrate) top tube. |
Transport | Whole blood at 20 - 25ºC. |
Remarks | Draw blood into the citrate tube (light blue cap) filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3-4 times to avoid clotting. |
Stability | Ambient: 12 hours |
Unacceptable Conditions | Specimens that are clotted, collected in the wrong specimen tube, less than 90% filled, or hemolyzed are not acceptable for testing. |
Schedule | Daily-24 hours per day |
Billing Code | 4010040 |
CPTCode | 85730 |
Preferred Specimen Collection Device(s) | |
Reference Interval | |
22.0 - 34.3 seconds |