ABSTRACT
Introduction: The etiology of recurrence of chronic subdural hematoma (CSDH) after surgical evacuation has not been completely understood until now, but several risk factors for recurrence have been reported. Meanwhile, the definitive risk factors have not been defined until now. Aim of Study: Analyze the potential risk factors, and emphasize preoperative, operative and post-operative ones for CSDH recurrence. Patients and Methods: This study is a prospective randomized clinical trial study including 82 patients with symptomatizing CSDH who underwent burr holes procedure and irrigation with closed system drainage for CSDH at Neurosurgical Department—Assuit University Hospital from July 2016 to July 2018. The possible factor studied for recurrence included age, hypertension, diabetes mellitus, liver diseases, Hemoglobin (Hb) level, prothrombin concentration and time (PC and PT), hematoma thickness and internal architecture, number of burr holes and position of drain, duration of drainage, amount of drainage and presence of postoperative residual hematoma on follow up CT brain. Multiple logistic regression analysis is used to assess the predictors of recurrence. Results: This study included 70 males and 12 females. The mean age was 58.9 years (range 34 - 93 years). 6 patients presented with recurrent CSDH. Age above 60 years, Hypertension, Diabetes mellitus (DM), prolong PT, separated and trabecular internal architecture of hematoma, and the thickness of hematoma more than 20 mm in pre-operative CT and postoperative residual hematoma were statistically significant factors for recurrence of CSDH. Conclusion: This information might be helpful in detecting patients with possible high incidence of recurrence and directing for close follow ups and acts that may reduce the incidence of recurrence.