Efficacy of Closed-System Drainage in Treating Chronic Subdural Hematoma: A Prospective Comparative Study

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Abstract
The authors conducted a prospective comparative study on the recurrence rate of chronic subdural hematoma after the use of two different treatment modalities: burr-hole irrigation of the hematoma cavity with (Group A) and without closed-system drainage (Group B). Thirty-eight patients were studied. Patients were assigned to groups sequentially upon admission. There were no significant differences between the two groups for age, sex, preoperative hematoma volume, and density on computed tomographic scan. One patient in Group A (5%) suffered a recurrence as opposed to 6 in Group B (33%). The difference in recurrence rate between the two groups was statistically significant (p < 0.05). The authors conclude that closed-system drainage after burr-hole irrigation reduces the recurrence rate of chronic subdural hematoma.

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