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Effect of Transcutaneous Electrical Nerve Stimulation on Postoperative Pain after Inguinal Hernia Repair: A Randomized Placebo-Controlled Trial - Original Article

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Author(s): Mohammed Taher Ahmed

Journal: Türkiye Fiziksel Tıp ve Rehabilitasyon Dergisi
ISSN 1302-0234

Volume: 56;
Issue: 4;
Start page: 170;
Date: 2010;
Original page

Keywords: Postoperative pain | inguinal hernia repair | transcutaneous electrical nerve stimulation

ABSTRACT
Objective: Transcutaneous electrical nerve stimulation (TENS) is widely used for pain management in various clinical conditions. In this prospective, randomized, double-blind, placebo-controlled study, we investigated the effect of TENS on postoperative pain, analgesic requirements and serum cortisol level (SCL) after inguinal hernia repair.Materials and Methods: Sixty-seven patients, who underwent a standard surgical hernia repair using the Lichtenstein principles with a wound infiltration anesthetic technique, were randomly chosen to receive either active TENS (conventional TENS at 100 Hz, with a pulse width of 120 microseconds and a perceptible tingling sensation) or placebo TENS treatment. Both active and placebo TENS treatments were applied for 30 minutes, twice daily for 5 consecutive days using two electrodes placed parallel to the incision. Pain intensity was assessed using the visual analogue scale (VAS) and SCL measured on 5 consecutive postoperative days (PODs), respectively. Follow-up assessment of pain intensity was performed at 30 days postoperatively.Results: Baseline parameters were similar between the groups. Pain intensity in the active TENS group significantly decreased at POD1 (p
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