Letters To ‘Surfers: A Visitor from Belgium

Activated Clotting Time (ACT) for Monitoring of Low-Dose Heparin: Performance Characteristics in Healthy Adults and Critically Ill Patients

In heparin-spiked blood, ACT is sensitive to heparin at levels of ≥0.1 IU/ml heparin. In ICU-patients, ACT did not correlate with UFH dose or other established methods. Both systems were differently influenced by certain parameters.