In the past 2 years, Mr. L., a 56-year-old architect, has experienced three episodes of deep vein thrombosis. All occurred without complications, and all were treated successfully with anticoagulant...

In the past 2 years, Mr. L., a 56-year-old architect, has experienced three episodes of deep vein thrombosis. All occurred without complications, and all were treated successfully with anticoagulant therapy and bed rest. He now arrives at the urgent care center because of increased pain and swelling in his left calf that has lasted for the past 3 days. Initially he is given 5000 units of heparin IV. On admission to the hospital for anticoagulant therapy, he is started on a continuous infusion of 25,000 units of heparin in 1000 mL of 0.9% sodium chloride. 1. What nursing actions should be implemented to ensure the accuracy and safety of the continuous heparin infusion? 2. What patient findings would indicate a therapeutic response to the heparin therapy? During Mr. L.’s hospital stay, the physician orders an extra bolus of 10,000 units of heparin, IV push, because the results of Mr. L.’s laboratory tests indicated that his activated partial thromboplastin time (aPTT) was not at a therapeutic level. After giving the dose, the nurse notices that a dose of 50,000 units was given instead of 10,000 units. 3. What will the nurse do first, and what subsequent orders will the nurse prepare to carry out? 4. How could this error have been prevented?