A patient is scheduled for an elective surgical procedure. The nurse identifies that the patient takes Dabigatran (a direct oral anticoagulant) for non-valvular atrial fibrillation. Under clinical guidelines, why must dabigatran be discontinued 24 to 48 hours prior to elective surgery (or longer if renal impairment is present)?

Answer and explanation

Correct answer: A. To reduce the risk of perioperative bleeding while its anticoagulant effect clears

  1. Step 1: Direct Oral Anticoagulants (DOACs) like dabigatran reversibly inhibit thrombin (Factor IIa).
  2. Step 2: Because dabigatran has a plasma half-life of 12-17 hours, withholding it 24 to 48 hours before elective surgery ensures adequate clearance of anticoagulant activity, restoring normal hemostasis and minimizing perioperative bleeding risk.
Answer
To allow clearance of the anticoagulant and minimize the risk of major perioperative surgical hemorrhage.
Why not the others: 'Prevent paralytic ileus' is related to opioid analgesia and surgical handling, not anticoagulants; 'Prevent rebound pulmonary hypertension' occurs with prostacyclin withdrawal; 'Malignant hyperthermia' is triggered by volatile anesthetics.

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