Final answer:
Those on heparin and warfarin are at risk of bleeding; thus, their aPTT and PT should be increased to prevent excessive bleeding due to prolonged clotting times.
Step-by-step explanation:
People on heparin and warfarin are at risk of bleeding, so their aPTT (activated Partial Thromboplastin Time) and PT (Prothrombin Time) clotting times should be increased. This is because heparin and warfarin are anticoagulants that work by inhibiting the blood clotting process. As a result, patients taking these medications may have prolonged clotting times, which poses a risk of excessive bleeding if the clotting time is too prolonged. To manage this risk, healthcare providers monitor clotting times through regular blood tests to ensure they are within a safe range.