Final rule · 2025-08151

Medical Devices; Hematology and Pathology Devices; Classification of the Coagulation System for the Measurement of Whole Blood Viscoelastic Properties in Perioperative Patients

The Food and Drug Administration (FDA, Agency, or we) is classifying the coagulation system for the measurement of whole blood viscoelastic properties in perioperative patients into class II (special controls). The special controls that apply to the device type are identified in this order and will be part of the codified language for the coagulation system for the measurement of whole blood viscoelastic properties in perioperative patients' classification. We are taking this action because we have determined that classifying the device into class II (special controls) will provide a reasonable assurance of safety and effectiveness of the device. We believe this action will also enhance patients' access to beneficial innovative devices, in part by reducing regulatory burdens.