A normal range is around 21 to 35 seconds. But test results will vary depending on equipment and methods used. So standard normal results will differ in each lab. If your aPTT takes longer than normal, it may mean several things.
About the Author: Dr. Karishma Shinde
Dr. Karishma Shinde, B.H.M.S (MUHS Nashik) PGD, EMS (RHC Pune and the Director of Sunrise diagnostics Centre along with her team works with a vision of rendering care for the happiness of humankind and freedom from illness.