NCLEX RN Practice Question # 961

Option D is the correct answer;

Rationale: The normal aPTT varies between 30 and 40 seconds (30 and 40 seconds), depending on the type of activator used in testing. The therapeutic dose of heparin for treatment of deep vein thrombosis is to keep the aPTT between 1.5 (45 to 60) and 2.5 (75 to 100) times normal. This means that the client’s value should not be less than 45 seconds or greater than 100 seconds. Thus, the client’s aPTT is within the therapeutic range and the dose should remain unchanged.