Efficacy of Subperiosteal Drains in Chronic Subdural Hematoma: A Prospective Randomized Single-Center Study.

Background:  Chronic subdural hematomas (cSDHs) are most frequently treated by evacuation via a burr-hole craniostomy procedure. Subperiosteal drains have been introduced as alternatives to subdural ones, but only a few prospective studies have explored their efficacy. Thus, a prospective randomized trial was designed to assess their use.

Methods:  The study enrolled patients with newly diagnosed surgically amenable cSDH. These patients were randomized into two groups. The first group underwent cSDH evacuation via a single burr hole craniostomy procedure, followed by placement of a subperiosteal drain; the second group underwent the identical procedure without drain placement. Patient demographics, drain volumes, duration of drainage, cSDH recurrence, and postoperative outcomes were recorded.

Results:  Eighty-eight patients presenting with cSDH (12 with bilateral cSDHs) from a total of 100 surgical cases were enrolled. Nine patients (1 bilateral) were lost to follow-up. Of all remaining 90 procedures, 37 were carried out with drain placement and the remaining 53 without drain placement. There were five recurrent cases (13.5%) in the drain placement group and 17 (32.1%) in the group without drain placement. This resulted in a statistical significance (odds ratio [OR]: 0.33;  < 0.05) favoring the use of a drain.

Conclusion:  Subperiosteal drain placement can be used safely and effectively to treat cSDH in conjunction with a burr-hole craniostomy procedure, significantly reducing the rate of recurrence without any additional disadvantages.