Comparison of electrode site preparation techniques.

A posttest-only control group design was used to study the effects of two electrode site preparation techniques on reducing electrical potential across a pair of disposable skin electrodes. Sixty health volunteers were randomly divided into one control and two treatment groups of 20 subjects each. Within each group, the treatment was further assigned randomly to either the right or left forearm. Analysis of variance and paired t test analyses were used to compare group differences. Skin preparation by using One Step Skin Prep significantly decreased skin potentials (-1.90 mV) whereas the group in which ECG Prep Pads were used and the control group had no significant change.