The nurse should adjust a client's heparin dose according to a prescribed anticoagulation prescription based on maintaining which laboratory value at what therapeutic level for anticoagulant therapy?...

The nurse should adjust a client's heparin dose according to a prescribed anticoagulation prescription based on maintaining which laboratory value at what therapeutic level for anticoagulant therapy?

1. Partial thromboplastin time, 1.5 to 2.5 times the normal control.

2. Prothrombin time, 1.5 to 2.5 times the normal control.

3. International Normalized Ratio, 2 to 3 seconds.

4. Thrombin clotting time, 10 to 15 seconds.