When is it safe to start thromboprophylaxis after splenic angioembolization?

Area of Science:

• Trauma Surgery
• Vascular Surgery
• Critical Care Medicine

Background:

• Thromboprophylaxis after blunt splenic trauma is complex due to bleeding risks.
• The specific risks of thromboprophylaxis following splenic angioembolization remain unclear.
• Earlier thromboprophylaxis may increase bleeding without reducing venous thromboembolism (VTE).

Purpose of the Study:

• To evaluate the association between the timing of thromboprophylaxis initiation and bleeding complications after splenic angioembolization.
• To determine if earlier thromboprophylaxis initiation mitigates VTE events in patients with blunt splenic trauma.
• To identify the optimal window for initiating thromboprophylaxis to balance bleeding and VTE risks.

Main Methods:

• Analysis of the American College of Surgeons Trauma Quality Improvement Program (2017-2019).
• Inclusion of blunt trauma patients undergoing splenic angioembolization within 24 hours.
• Exclusion of patients with short stays, severe injuries, or pre-angioembolization surgery; comparison using chi-squared and logistic regression.

Main Results:

• In 1,102 patients, 73% received thromboprophylaxis; 84% had high-grade splenic injuries.
• Initiating thromboprophylaxis within 24 hours increased splenic surgery post-angioembolization (5.7% vs 1.7%).
• Delayed initiation (after 72 hours) correlated with higher pulmonary embolism rates (2.3% vs 0.2%), and multivariate analysis linked timing to both bleeding and VTE complications.

Conclusions:

• Initiating thromboprophylaxis between 24 and 72 hours offers the best balance between minimizing bleeding and VTE risks.
• A 48-hour interval is suggested as the ideal time for protocolized thromboprophylaxis administration.
• This national study provides critical insights into optimizing thromboprophylaxis timing after splenic angioembolization.