A 68-year-old male patient with a history of atrial fibrilla…

A 68-year-old male patient with a history of atrial fibrillation is being treated with heparin for pulmonary embolism following recent knee surgery. His platelet count was 220,000/µL at the time of admission. On day 5 of heparin therapy, the nurse reviews the latest laboratory results, which show a platelet count of 80,000/µL. The patient is asymptomatic but reports a mild headache and a slight rash on his legs. Which of the following is the nurse’s most appropriate next action?     Lab Values: Platelets – 150,000 – 450,000/μL