Prolonged prothrombin time and activated partial
thromboplastin time due to underfilled specimen tubes with 109 mmol/L (3.2%) citrate anticoagulant.
activated partial
thromboplastin time for monitoring unfractionated heparin: A pilot study.
Califf et al., "Activated partial
thromboplastin time and outcome after thrombolytic therapy for acute myocardial infarction: results from the GUSTO-I trial," Circulation, vol.
One-Stage Prothrombin Time (PT) Test and Activated Partial
Thromboplastin Time (APTT) Test; Approved Guideline H47-A2, 2nd edn.
aPTT, a modified version of the activated Partial
Thromboplastin Time test, is a test that measures the intrinsic pathway of coagulation.
Extremely shortened activated partial
thromboplastin times [letter].
Table 1 shows the mean and standard deviation for the systolic pressure, diastolic pressure, prothrombin time test, and activated partial
thromboplastin time test of hypertensives and normotensives including the duration of hypertensive subjects enrolled in the study.
Thromboelastography as a better indicator of hypercoagulable state after injury than prothrombin time or activated partial
thromboplastin time.
Thus, coagulation time of the constant R, reflecting velocity of
thromboplastin production, lengthened by 62%, K--time of clot production lengthened by 63%, thromboelastograph constant R/K, showing use of prothrombin by
thromboplastin, increased by 3.2%.
The number of patients classified as coagulopathic varied greatly according to the particular diagnostic criteria used; 164 patients (33.95%) met one of the three diagnostic criteria (an abnormality in either prothrombin time, partial
thromboplastin time, or platelet count), and 32 patients (6.63%) met two or three of these criteria.
Unfractionated heparin (UF) is commonly used in anticoagulant therapy and is monitored by a variety of methods including activated partial
thromboplastin time (aPTT), anti-Xa assays, and during surgery or other invasive procedures by the activated clotting time (ACT).
The study looked for associations between half a million genetic markers and time taken for blood to clot, measured by a test called activated partial
thromboplastin time (aPTT).