Following internal tests, contamination of STA®-LIQUID ANTI-Xa by Stago Fibrinogen reagents was identified in UFH and LMWH applications on STA SATELLITE® or STA SATELLITE MAX® analyzers. Contamination occurs when one or more tests with the STA®-Fibrinogen 5 reagent are performed before the STA®-LIQUID ANTI-Xa test for heparin monitoring on an STA SATELLITE® or STA SATELLITE MAX® analyzer. This contamination causes an underestimation of heparin levels which could lead to a heparin treatment change and a subsequent overdose risk for the patient. Recall start date: July 21, 2025