Figure 3

Schematic of the electrode positioning setups for impedance measurement on the urinary bladder and rectum. In cases one to ten four electrodes per organ were needed, in cases eleven and twelve two electrodes per organ were used. Urinary bladder: Setup 1 uses needle electrodes and catheter electrodes; Setup 2 uses needle electrodes only. Rectum: Setup 1 uses needle electrodes only, Setup 2 uses needle electrodes and surface electrodes on a rectal probe, Setup 3 uses surface electrodes only.