ABC/2 formula for “bedside” postoperative pneumocephalus volume measurement

Abstract

Highlights • The ABC/2 method is an accurate and simple “bedside” technique to estimate pneumocephalus volume. • The postoperative pneumocephalus volume after bilateral burr-hole drainage was significantly larger than that of unilateral burr-hole drainage (29.34 ml versus 12.21 ml, p < 0.001). • The estimated volumes of pneumocephalus by the formula ABC/2 were significantly correlated to the volumes as measured by the computer-assisted volumetric technique, with r = 0.992 (p < 0.001).

Keywords

• ABC/2
• Chronic subdural haematoma
• Burr-hole
• Pneumocephalus