Medina V, Clochesy J M, Omery A
University of California, Los Angeles School of Nursing.
Heart Lung. 1989 Sep;18(5):456-60.
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.
采用仅后测控制组设计来研究两种电极部位准备技术对降低一对一次性皮肤电极间电位的影响。60名健康志愿者被随机分为一个对照组和两个治疗组，每组20名受试者。在每个组内，治疗进一步随机分配到右前臂或左前臂。采用方差分析和配对t检验分析来比较组间差异。使用一步皮肤准备法进行皮肤准备可显著降低皮肤电位（-1.90 mV），而使用心电图准备垫的组和对照组则无显著变化。
