A Novel And Precise Method For Evaluation Of Chronic Subdural Hematoma Volume

This study aimed to establish and validate a new volume estimation method for chronic subdural hematoma (CSDH) based on the shape of CSDH similar to ellipsoid. Forty-six CT scans diagnosed as CSDH were reviewed. Based on the shape of CSDH more close to crescent or ellipsoid, we derivated a volume formula, and calculated the hematoma volume by using v (formula), v (2/3sh), v (1/2abc) and v (1/3abc), respectively, with computerassisted volumetric analysis (CAVA) as gold standard. There are no statistical differences between v (formula) and v (Gold standard) groups (63.42 +/- 9.92 vs. 63.42 +/- 9.92, P > 0.05), whereas the hematoma volumes of v (2/3sh), v (1/2abc) and v (1/3abc) groups significantly differed from v (formula) or v (Gold standard) group (71.69 +/- 13.58, 81.40 +/- 15.59, and 51.82 +/- 9.92, P < 0.05). Besides, there was a significant correlation between v (formula) and v (Gold standard) groups using Pearson coefficient (r = 0.978, P < 0.001), suggesting that all of the hematoma volumes calculated by v (formula) is close to real volumes. In summary, the present study demonstrated the better validity and accuracy of our formula in estimating subdural hematoma volumes compared with 1/2ABC, 1/3ABC and 2/3Sh formula.