Anti-Factor Xa for Unfractionated Heparin HEPUF
| Method(s) | Chromogenic Assay |
|---|---|
| Specimen Required | |
| Collect | One adequately filled 3.0 mL light blue (sodium citrate) top tube. For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below). |
| Transport | **TIME SENSITIVE** For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below) |
| Remarks | Draw blood into citrate tube (light blue top) filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3-4 times to avoid clotting. |
| Stability | Ambient: Refrigerated Plasma; Frozen Plasma: 2 weeks |
| Unacceptable Conditions | Specimens that are clotted, hemolyzed, collected in the wrong tube, less than 90% or greater than 110% filled, exceed the stability limits, or non-frozen plasma are unacceptable for testing. |
| Schedule | Daily |
| Billing Code | 4010525 |
| CPTCode | 85520 |
| Notes | Platelet-poor plasma must be frozen within 4 hours of collection into 2 plastic aliquot tubes. To obtain platelet-poor plasma, centrifuge tube, remove plasma, re-centrifuge tube, place into 2 plastic tubes, and freeze. |
| Preferred Specimen Collection Device(s) | |
