Active Versus Passive Drainage Systems for Subdural Hematomas: A Systematic Review and Meta-Analysis.

Background And Objectives: Chronic subdural hematoma (CSDH) management involves various surgical techniques, with drainage systems playing a pivotal role. While passive drainage (PD) and active drainage (AD) are both used, their efficacy remains contentious. Some studies favor PD for lower recurrence rates, while others suggest AD superiority.