Prophylaxis for deep venous thrombosis in craniotomy patients: a decision analysis

Area of Science:

• Neurosurgery
• Vascular Surgery
• Pharmacology

Background:

• Deep venous thrombosis (DVT) and pulmonary embolism (PE) are significant risks for craniotomy patients.
• Perioperative prophylactic strategies aim to mitigate these risks while minimizing complications like intracranial hemorrhage (ICH).
• Current guidelines often involve pharmacological prophylaxis, but its safety in neurosurgical patients is debated.

Purpose of the Study:

• To determine the most efficient perioperative prophylactic strategy for DVT in craniotomy patients.
• To compare the effectiveness of mechanical prophylaxis versus pharmacological prophylaxis (heparin) using a decision analysis model.

Main Methods:

• A structured literature review was conducted to gather data on DVT, PE, and ICH incidence in craniotomy patients.
• A decision analysis model was developed to compare pneumatic compression boots alone versus boots combined with unfractionated or low-molecular-weight heparin.
• Sensitivity analysis and Monte Carlo simulation were employed to handle data variability.

Main Results:

• Heparin prophylaxis reduced DVT and PE incidence but significantly increased ICH risk.
• The increased risk of ICH with heparin outweighed the benefits of DVT/PE prevention.
• Mechanical prophylaxis alone demonstrated superior overall outcomes compared to strategies involving heparin, particularly low-molecular-weight heparin.

Conclusions:

• Mechanical prophylaxis alone is the optimal perioperative strategy for craniotomy patients.
• Pharmacological prophylaxis with heparin, especially low-molecular-weight heparin, is associated with unacceptable ICH risks in this population.
• Decision analytic modeling supports mechanical prophylaxis as the superior choice for craniotomy patients.