Effects of Transcutaneous Electrical Nerve Stimulation on Chronic Pelvic Pain in Women: A Systematic Review and Meta-Analysis.

INTRODUCTION: The study aimed to identify the effects of transcutaneous electrical nerve stimulation (TENS) in women with chronic pelvic pain (CPP) by conducting a systematic review and meta-analysis of randomized controlled trials. METHODS: We used five international databases from 2000 to 2020 and selected the clinical trials that reported the effects of TENS on CPP. We excluded the case reports, acute pelvic pain reports, men-related, animal-related, and intravaginal and intrarectal electrical stimulation articles. The level of pain (based on the visual analog scale) was considered for pooling data through the meta-analysis. RESULTS: Ten studies met the inclusion criteria, and three articles were included in the meta-analysis. The results showed that TENS application mildly reduced pain in women with primary dysmenorrhea (mean difference = -1.29; 95% CI: -2.57 to -0.01; Z = 1.98, p = 0.05). Also, to reduce pain in patients with CPP, the TENS must be applied at least for 20 min, with a pulse duration of 50-400 µs, at a frequency of 2-120 Hz. The meta-analysis was followed by assessing the risk of bias, including publication bias. Based on the Cochrane risk of bias evaluation, the majority of the included trials were assessed with moderate methodological quality. CONCLUSION: TENS application can mildly improve the level of pain in patients with CPP caused by primary dysmenorrhea. Although no distinct agreement was observed among the effective parameters, the high-frequency mode with maximum tolerated intensity was more effective compared to the low-frequency mode.

Efficacy of low-level laser therapy on management of Bell's palsy: a systematic review.

The aim of this study is to evaluate the efficacy of low-level laser therapy (LLLT) in patients with Bell's palsy (BP) through a systematic review method. We systematically searched international databases including PubMed, Scopus, and Web of Science to find eligible articles without language limitation. All relevant randomized controlled trials (RCTs) that compared the efficacy of the LLLT with placebo laser, exercise, massage, or no intervention on BP patients were included. Four studies (out of 259) had met our inclusion criteria involving 171 patients and were entered to the systematic review. Full texts of the selected studies were retrieved and critically appraised using Physiotherapy Evidence Database (PEDro) scale. The patients of all trials were in sub-acute (less than 1 week) stage. Both of LLLT and control groups showed significant improvement after trials. Two authors reported significant differences between the groups after 6 weeks of laser application (830 nm, 100 mW). In converse, two other authors did not identify any effectiveness following 4 weeks and 15 days of LLLT application with 670 and 830 nm wavelength, sequentially. There is clear lack of information lead to get and evidence-based suggestion for the LLLT application on Bells' palsy; however, the LLLT irradiation with 830 nm and 100 mW power for a period of 6 weeks might be beneficial on recovery for the patients with sub-acute Bell's palsy. There were no reported adverse effects during treatment and/or follow-up sessions.

The role of scapular kinematics in patients with different shoulder musculoskeletal disorders: A systematic review approach.

This study aimed to identify the role of the scapula in shoulder musculoskeletal disorders (SMDs) and provided a systematic review of available studies in the field of scapular three-dimensional kinematics. We systematically searched 5 international databases, including Scopus, EMBASE, PubMed, CINAHL, PEDro, and Cochrane Library from June to September 2015. Twenty studies met the inclusion criteria and were retrieved in full paper. The selected studies were critically appraised independently by two researchers. The patients with shoulder impingement syndrome (SIS) and shoulder instability had an increased protraction, lesser upward rotation (UR), and increased internal rotation (IR) during scapular plane elevation, whereas the patients with frozen shoulders had lesser protraction. Moreover, the patients with SIS had a greater scapular posterior tilt (PT) and external rotation during shoulder abduction. Increased scapular UR and PT with decreased scapular IR was seen in patients with stiffness of Latissimus Dorsi and fibromyalgia without any changes in the scapular IR. The results of this systematic review help the clinicians to have an insight about scapular kinematics as a predictive index for SMDs.