Which prophylaxis is typically used to prevent venous thromboembolism in neuro patients, and when is it contraindicated?

• A. Heparin or low-molecular-weight heparin with mechanical devices; contraindicated in active intracranial bleeding or high bleeding risk.
• B. No prophylaxis; only early ambulation.
• C. Only aspirin.
• D. Warfarin in first 24 hours.

Answer: (A)

Prevention of venous thromboembolism in neuro patients relies on pharmacologic prophylaxis with heparin or low-molecular-weight heparin, typically used alongside mechanical devices such as sequential compression devices to further reduce risk. This approach is contraindicated when there is active intracranial bleeding or a high risk of bleeding because anticoagulation could worsen hemorrhage and cause deterioration. In those cases, mechanical prophylaxis is used initially, and pharmacologic prophylaxis is started only when bleeding risk has decreased and it is safe to do so.

Early ambulation and mechanical devices help, but they don’t provide the same level of protection as pharmacologic prophylaxis. Aspirin is not effective for venous thromboembolism prevention in this setting, and initiating warfarin in the first 24 hours is inappropriate due to unreliable rapid anticoagulation and increased bleeding risk.