Safety and Additive Efficacy of Dual CSF Drainage (Ventricular + Lumbar) in Severe Aneurysmal Subarachnoid Hemorrhage: A Secondary Analysis of the EARLYDRAIN Trial

The authors aimed to assess the safety and additive efficacy of simultaneous dual cerebrospinal fluid (CSF) drainage (ventricular plus lumbar) compared to isolated external ventricular drainage (EVD) in patients with high-grade aneurysmal subarachnoid hemorrhage (aSAH). Their findings indicate that while dual drainage is safe, it does not independently reduce the risk of vasospasm or improve functional outcomes when accounting for injury severity. The study suggests that high-volume CSF drainage is associated with shunt dependency but does not correlate with functional recovery, highlighting a potential "volume paradox."