Comparison of Drainage Volume of Chronic Subdural Hematoma According to Drainage Catheter Type

PURPOSE To assess the therapeutic value of two different drainage catheters in treating chronic subdural hematoma (CSDH). MATERIALS AND METHODS Two types of drainage catheters can be used to treat CSDH according to the position of holes in the catheter: open-type or closed-type catheter. In this retrospective study, 199 total patients with CSDH were reviewed according to catheter type. Among them, 84 patients were and 113 in the closed-type group (holes positioned within the distal- most 1 cm of the catheter). The surgeon selected the catheter type. Total drainage volume, initial drainage volume within 2 days, percentage of initial drainage volume per total drainage volume, duration of catheter insertion, and reoperation rate were compared. RESULTS Total drainage volume was not different between the two groups (p=0.333). The initial drainage volume within 2 days was larger in the open-type group than closed-type group (p=0.024), but the percentage of initial drainage volume per total drainage volume was not different (p=0.354). The duration of catheter insertion was shorter in the open-type group than closed-type group (p=0.015). The reoperation rate of CSDH was also higher in the open-type group than closed-type group (p=0.004). CONCLUSION CSDH drainage with an open-type catheter is faster compared with a closed-type catheter, but total drainage volume is similar and reoperation rate is higher. Therefore, the open-type catheter for CSDH drainage has limited clinical value.