A total of 2321 paired aPTT/anti-Xa values from 539 patients were studied. Data pairs were discordant most of the time: 413 (18%) data pairs had a low aPTT value compared with the anti-Xa value ...
Clinically reported values were used ... of aPTT and anti-Xa activity in a group of patients with normal baseline coagulation function who were treated with UFH. These data were used to design ...