Neurostimulation Improves Outcomes in Acute and Critically Ill Patients With Dysphagia
A systematic review and meta-analysis published in Journal of Oral Rehabilitation assessed the effectiveness of neurostimulation therapies in treating dysphagia in acute and critically ill patients. Forty-four RCTs comprising 2198 patients were included, encompassing 5 types of neurostimulation therapies: transcutaneous auricular vagus nerve stimulation (ta-VNS), neuromuscular electrical stimulation (NMES), repetitive transcranial magnetic stimulation (rTMS), transcranial direct current stimulation (tDCS), and pharyngeal electrical stimulation (PES). Compared with traditional dysphagia therapy (TDT), usual care, or sham stimulation, neurostimulation therapies significantly improved swallowing function post-treatment (SMD −0.74; 95% CI, −0.90 to −0.58), increased the rate of patients regaining the ability to take food orally (RR 1.39; 95% CI, 1.12-1.74) and enhanced swallowing function at 1 month (SMD −1.28; 95% CI, −1.76 to −0.81) and 2 months (SMD −2.24; 95% CI, −3.25 to −1.23). However, neurostimulation did not show significant improvements in swallowing function at 3 months post-treatment (SMD −0.43; 95% CI, −1.08 to 0.22), decannulation (RR 3.47; 95% CI. 0.60-20.23), aspiration (RR 0.67; 95% CI, 0.36-1.26) or shortened hospital stays (MD −1.74; 95% CI, −4.78 to 1.30). The findings suggest that NMES + TDT, rTMS + TDT, NMES, tDCS + TDT, rTMS, PES + TDT and PES are effective therapies for improving swallowing function in acute and critical care patients.