An Investigation into the Effect of Transcutaneous Electrical Nerve Stimulation on Postoperative Pain Intensity in Patients with Bone Fracture: A Clinical Trial

Background: From patients’ perspective, pain is the most frequent complaint after surgery, which results in many complications such as sleep disorder, atelectasis, myocardial ischemia, respiratory infection, immune system disorder, and anxiety. In this context, deploying complementary and low-risk methods is extremely important in alleviating pain after orthopedic surgery. Objectives: This study explored the impact of transcutaneous electrical nerve stimulation (TENS) on pain intensity in patients after orthopedic surgery. Methods: This clinical trial was performed on 80 individuals admitted to the orthopedic ward of Khatam al-Anbia Hospital, Zahedan, Iran, in 2017. The patients were enrolled at least 24 hours after surgery and randomized into intervention (n = 40) and control (n = 40) groups. Pain was initially measured in the two groups using a visual analog scale. Then, the intervention group received TENS for 30 minutes. Finally, pain scores were re-evaluated in the both groups. Results: The subjects did not have any significant difference in terms of demographic variables. The mean pain intensity after the experiment was significantly different between the intervention (3.17 ± 1.75) and control (4.97 ± 1.86) groups, with the former perceiving less pain. Conclusions: TENS is effective in reducing pain after orthopedic surgery and is suggested to be administered in combination with medication to enhance pain relief.