Surgical management of chronic subdural hematomas through single-burr hole craniostomy: is it sufficient?

Abstract Background Symptomatic chronic subdural hematomas (CSDH) remain one of the most encountered forms of intracranial hemorrhages particularly in the elder patients, yet fortunately implies a good surgical prognosis. Burr hole evacuation under general anesthesia is the most commonly used neurosurgical technique for the management of CSDH. Clinical disagreement between many studies regarding the number of burr holes required to achieve the optimal surgical and clinical outcome has long existed. The objective of this study is to evaluate the prognosis and clinical outcome following the use of single-burr hole craniostomy technique in the aim of surgical evacuation of CSDH. Results This is a retrospective study of 30 patients, with symptomatic unilateral or bilateral CSDH managed by the authors strictly by single-burr hole evacuation with closed-system drainage on the corresponding site of the hematoma. Clinical outcome was then assessed at 1, 7, and 30 days after surgery using the Glasgow Coma Scale (GCS) and by comparing the Markwalder grade scale before surgery to 1 month following surgery; the pre- and post-operative radiological data, clinical neurological progress and the possible incidence of complications postoperatively were also recorded. Study duration was from August 2019 to October 2020. Our study included 18 (60%) male patients and 12 (40%) female patients. The main presenting symptom was altered level of consciousness noted in 29 (96.7%) patients; a history of a relevant head trauma was recorded in 11 patients (36.7%). The GCS showed a statistically highly significant improvement comparing the preoperative to the postoperative values throughout the follow-up intervals (p = 0.001); similarly, the Markwalder score significantly improved 1 month after surgery, where 17 (63%) patients were Markwalder grade 0, 9(33.3%) patients were grade 1, a single patient (3.7%) was grade 2, and none were Markwalder grade 3. Conclusion Our study concluded that single-burr hole craniostomy with closed-system drainage for the management of symptomatic CSDH would be a sufficient approach to achieve a good surgical outcome with a low complication rate. Larger series and further studies would be yet considered with longer follow-up periods