“…upper abdominal operation, elective abdominal surgery, appendectomy and herniorrhaphy) the authors could not achicvc pain relief with TENS (19)(20)(21)(22). In other prospective randomized studies TENS produced relief of pain after thoracic (5, 14,17), abdominal (5,6,8,10,12,13,16,18) and orthopaedic (7, 9, 1 1 , 15) surgery. The standard sites of stimulation were both sides of the wound.…”