According to the study authors, PT and aPTT tests within the normal range provided relatively low specificity for identifying DOAC concentrations for all three drugs and combining the two tests did ...

The possible causes of the isolated prolonged aPTT in this case include factor deficiencies and factor inhibitors. Prolongation of both the PT and aPTT ... patients with normal aPTT values can ...

This test is sometimes called an activated partial thromboplastin time (APTT) test. Your doctor may ... PTT test results are measured in seconds. Normal results are typically 25 to 35 seconds.

The most common methods for monitoring UFH are the activated partial thromboplastin ... range (66% vs 42%, p < 0.0001). A significant difference was seen between the 2 groups in the number of aPTT ...

1-3 Abnormalities in coagulation screening measures, including a prolonged activated partial-thromboplastin ... aPTT with a 50:50 mix (i.e., in a sample made up of 50% patient plasma and 50% ...