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 ...

That’s when your doctor might order a partial thromboplastin ... and your aPTT to be 60 to 80 seconds. If your number is higher than normal, it could mean several things, from a bleeding ...