Fig. 7
Deviation of the different measurement tools for cystovolumetry compared to the actual bladder volume, validated by urine collection in the measuring pitcher. For BCmax, the two US methods and the EIT method are similar but, nevertheless, show a significant offset from the actual bladder volume. However, BS has a significantly higher error compared with the other three methods. For estimation of residual urine (RU), all four methods (including EIT) showed decreased accuracy. P < 0.05 indicates a significant difference and is marked with an asterisk