Thromboprophylaxis in ICU Patients

Standard Prophylactic Dosing

• The American College of Chest Physicians recommends administering prophylactic-dose enoxaparin 40 mg subcutaneously once daily after careful bleeding risk assessment for critically ill ICU patients, with consideration for intermediate-dose regimens in high-risk patients 1, 2
• For patients with normal renal function, the standard prophylactic dose is enoxaparin 40 mg subcutaneously once daily 1

Dose Escalation for High-Risk Patients

• For patients with obesity (BMI >30 kg/m²), consider increasing to enoxaparin 40 mg twice daily or 50% dose increase 1, 2
• For morbidly obese patients (BMI >40 kg/m²), use enoxaparin 0.5 mg/kg twice daily 1
• For patients with severe hypercoagulability (D-dimer >6 times upper limit of normal or sepsis-induced coagulopathy score ≥4), consider enoxaparin 40-60 mg daily or 40 mg twice daily 1, 2, 3

Multimodal Prophylaxis Strategy

• Combine pharmacologic and mechanical prophylaxis by adding intermittent pneumatic compression devices to enoxaparin in all critically ill, immobile ICU patients 1, 2, 4

Renal Impairment Management

• For ICU patients with renal impairment (acute kidney injury, CrCl <30 mL/min, or end-stage renal disease), switch to UFH 5,000 units subcutaneously every 8-12 hours 1

What NOT to Do

• Avoid therapeutic-dose anticoagulation for primary prophylaxis, and reserve it only for confirmed VTE events 1, 2, 4

Duration of Prophylaxis

• Continue thromboprophylaxis throughout the entire ICU stay and hospital admission 1, 4