Endoscopic evacuation of septated chronic subdural hemorrhage - Technical considerations, results, and outcome.

BACKGROUND: Chronic subdural hematoma (cSDH) is a common entity in the elderly. Homogeneous or well-liquefied CSDH has a standard line of treatment through burr hole and irrigation. However, the management of septated chronic subdural hematoma (sCSDH) with multiple membranes does not have a well-defined surgical approach. The neomembranes forming septations prevent evacuation of clots through burr holes, and the small remaining loculi with clots will enlarge overtime to cause recurrence. METHODS: Patients with sCSDH were operated through a minicraniotomy (2.5 cm × 2.5 cm) using rigid endoscopes for visualization of the subdural space. Using endoscope, the entire subdural space can be visualized. The neomembranes are removed with standard neurosurgical microinstruments. The entire cavity is irrigated under vision to remove all clots and ensures hemostasis. RESULTS: Eighty-three endoscope-assisted evacuations were done in 68 patients from January 2016 to April 2020. Fifty (73.5%) patients had unilateral and 18 (26.5%) had bilateral subdural. Only 1 patient (1.47%) had a clinically significant recollection of subdural bleeding 1 month after the procedure. Over a mean follow-up period of 25.3 months (range 1-53 months), rest of patients did not show any recollection. CONCLUSION: Endoscopic evacuation of sCSDH is a safe and effective method and can be used to improve clot evacuation, and remove neomembranes under direct vision to reduce the rates of recollection. This method also obviates the need for larger craniotomies to remove membranes.