Stanford Hospital & Clinics and Lucile Packard Children’s Hospital
RESULT
Test Name : Heparin Xa (LMWH), Plasma Order Code : ANTIXA
Note: Test performed by routine Coagulation lab
Synonyms: LMWH activity by anti-Xa activity
Specimen Type: Platelet-Free Plasma
Container Type: Light-blue-top tube (Sodium citrate)
Required Volume: Full tube (4.5 mL blood)
Minimum Volume (Pediatric): Full tube (2.7 mL blood or 1.8mL blood depending on size of tube used)
Methodology: Chromogenic assay
Standard Run Times: 24 Hours per day, performed only at SHC routine coagulation lab location
Turnaround Time: 24 hours/next day
Special Handling: Within 1 hour of collection, centrifuge tube to obtain platelet-poor plasma. The plasma is transferred to a plastic tube to be spun a second time to remove the platelet and obtain platelet-free plasma. Aliquot platelet-free plasma into plastic tubes (2 aliquots). Freeze immediately. CRITICAL FROZEN
CPT Codes: 85520
LPCH EPIC Code: LAB2977
SHC EPIC Code: LABANTIXA
Causes For Rejection: Clotted, gross hemolysis, improperly filled tube, received thawed.
Department: Coagulation