What is the initial infusion rate of bivalirudin for HIT?

What is the initial infusion rate of bivalirudin for HIT?

• A. 1.0 mg/kg/hr
• B. 0.01 mg/kg/hr
• C. 2.0 mg/kg/hr
• D. 0.15-0.2 mg/kg/hr

Answer: (D)

Direct thrombin inhibitors are used in HIT to provide anticoagulation without heparin. The starting infusion of bivalirudin is 0.15-0.2 mg/kg per hour. This range achieves therapeutic anticoagulation with a short half-life, allowing rapid adjustments if bleeding occurs. The other rates are outside the therapeutic range: 1.0 mg/kg/hr would markedly increase bleeding risk; 0.01 mg/kg/hr would be inadequate for anticoagulation; 2.0 mg/kg/hr is excessively high. Renal function affects dosing, and anticoagulation is guided by monitoring tests like aPTT or ACT.

Direct thrombin inhibitors are used in HIT to provide anticoagulation without heparin. The starting infusion of bivalirudin is 0.15-0.2 mg/kg per hour. This range achieves therapeutic anticoagulation with a short half-life, allowing rapid adjustments if bleeding occurs. The other rates are outside the therapeutic range: 1.0 mg/kg/hr would markedly increase bleeding risk; 0.01 mg/kg/hr would be inadequate for anticoagulation; 2.0 mg/kg/hr is excessively high. Renal function affects dosing, and anticoagulation is guided by monitoring tests like aPTT or ACT.