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Table 1 Measurement of cSDH postoperative pneumocephalus volume by ABC/2 versus computer-assisted measurement

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

Overall postoperative pneumocephalus volume measurement

Mean

Minimum

Maximum

 - ABC/2 method (ml)

16.26

0.20

123.40

 - Computer-assisted measurement (ml)

18.04

1.11

128.45

Postoperative pneumocephalus volume measurement in unilateral burr-hole drainage for cSDH

Mean

Minimum

Maximum

 - ABC/2 method (ml)

11.08

0.20

42.71

 - Computer-assisted measurement (ml)

12.21

1.11

43.59

Total postoperative pneumocephalus volume measurement in bilateral burr-hole drainage for cSDH

Mean

Minimum

Maximum

 - ABC/2 method (ml)

26.31

1.97

123.40

 - Computer-assisted measurement (ml)

29.34

2.25

128.45

  1. cSDH Chronic subdural haematoma, ml Millilitre