<qa>  What is a form of non-invasive electrical stimulation that produces a perceptible sensationTranscutaneous electric acupoint stimulation TEAS is a form of non-invasive electrical stimulation that produces a perceptible sensation via electrodes attached to the skin. It has no risk of infections and can potentially be applied by medical personnel with minimal training. Clinical trials have demonstrated that TEAS reduces the consumption of intra-operative anesthetics and general anesthesia related side-effects. 