Carpal tunnel syndrome (CTS) is one of the most common entrapment neuropathies caused by compression of the median nerve within the carpal tunnel in the wrist. 1 The diagnosis is based on medical history, clinical and physical examination findings, as well as electrophysiological confirmation. Available conservative treatments include wrist-resting splints, local steroid injections, non-steroidal antiinflammatory drugs (NSAIDs), physical therapy, diuretics, vitamin B6, and activity modification. However, the efficacy of these treatments remains controversial.
2,3Short-wave diathermy (SWD) is a form of electromagnetic therapy used at a frequency of 27.12 MHz in continuous or pulsed forms. Molecular distortion occurs due to the movement of ions in the electromagnetic field, and heat is generated in the deep tissues with induced eddy currents. 4 In addition to the effects of SWD on the tissues, healing is stimulated with increased vascular circulation and pain threshold, and decreased pain and chronic inflammation. 5 It is thought that these effects cannot be explained solely by the heating effect, and some of the therapeutic effects of SWD treatment Objectives: This study aims to compare the effects of pulsed and continuous short wave diathermy (SWD) treatment in carpal tunnel syndrome. Patients and methods: This double-blind, randomized controlled trial included 30 patients (55 wrists) diagnosed with mild or moderate carpal tunnel syndrome. Patients were randomized into three groups and administered splinting and one of the following treatments: group 1: continuous SWD, group 2: pulsed SWD, and group 3: placebo SWD. The treatment was applied five days a week for 15 sessions. Patients were evaluated by the Tinel's test, Phalen's and reverse Phalen's maneuvers, carpal compression test, the Boston Carpal Tunnel Questionnaire (BCTQ: includes 2 parts, namely the symptom severity scale and functional status scale), and a visual analog scale. Median motor distal latency, median sensory distal latency, and nerve conduction velocity were measured. Electrophysiological findings, clinical tests, and scales were evaluated at the beginning and end of the therapy. Results: A significant difference was observed in Phalen's maneuver positivity in the pulsed SWD group (p<0.05). Visual analog scale, BCTQfunctional status scale, BCTQ-symptom severity scale, median nerve motor and sensory latencies, and sensory nerve conduction velocity values were improved in both continuous and pulsed SWD groups (p<0.05). The placebo group also showed improved BCTQ-functional status scale and median nerve motor distal latency (p<0.05). BCTQ-symptom severity scale improved more in the continuous SWD group than the other groups (p<0.01), and improved median nerve sensory distal latency and nerve conduction velocity parameters were observed in both SWD groups than the control group (p<0.01). Conclusion: Continuous and pulsed SWD therapies supported with splinting were effective for improving pain, hand function, and electrophysiological findings. In ...