Table 58-7
- Diameter of electrode paddles (most common diameter, 8–10 cm)
- Impedance between metal electrode and skin: Decreased with gel designed to conduct electricity in the defibrillation setting
- Successive shocks: May decrease impedance and partially explain why an additional shock of the same energy can cause defibrillation when previous shocks have failed
- Lung volume: Air is a poor electrical conductor, so impedance is slightly higher during inspiration
- Paddle pressure: Pressure of at least 11 kg decreases resistance by improving contact between the paddle and the skin and by expelling air from the lungs