What is a normal PTT value?
Normal PTT values can vary between laboratories but 25 to 35 seconds is considered normal.
What PTT level is considered high?
A typical aPTT value is 30 to 40 seconds. If you get the test because you’re taking heparin, you’d want your PTT results to be more like 120 to 140 seconds, and your aPTT to be 60 to 80 seconds. If your number is higher than normal, it could mean several things, from a bleeding disorder to liver disease.
What is PTT range?
The reference range of the PTT is 60-70 seconds. In patients receiving anticoagulant therapy, the reference range is 1.5-2.5 times the control value in seconds. Critical values that should prompt a clinical alert are as follows: aPTT: More than 70 seconds (signifies spontaneous bleeding)
What’s the Normal PTT for partial thromboplastin?
Normal and Critical Findings Normal PTT values can vary between laboratories but 25 to 35 seconds is considered normal.
What is the therapeutic PTT range for heparin?
While protocols vary from institution to institution, the therapeutic PTT range for heparin is 60 to 100 seconds, with lower intensity dosing in the range of 60 to 80 seconds. Screening for Bleeding Disorders Patients with a propensity for bleeding should undergo testing to determine the presence of a clotting disorder.
How is PTT measured in a coagulation study?
PTT is usually measured as part of a panel of coagulation studies including international normalizing ratio (INR) and prothrombin time (PT). INR and PT both measure the activity of the extrinsic clotting cascade.
What kind of diagnoses are associated with elevated PTT?
Diagnoses associated with an elevated PTT include: Hemophilia A (Factor VIII deficiency) Factor VIII deficiency characterizes Hemophilia A, also known as classical hemophilia. This produces an intrinsic coagulation pathway defect, and thus elevated PTT on laboratory studies.
