Neurology · Medical Literature
Efficacy and safety of immersive, sEMG-triggered virtual reality game training for post-stroke dysphagia: a randomized, single-blind, controlled trial.
Abstract
Post-stroke dysphagia (PSD) is a common and serious complication. Traditional rehabilitation for PSD is often hampered by low patient adherence due to its unengaging nature. This study aimed to evaluate the efficacy and safety of an immersive, surface electromyography (sEMG)-triggered virtual reality (VR) game training as an adjunctive therapy for patients with PSD. In this prospective, randomized, single-blind, controlled trial, 60 patients with PSD were randomly assigned to an experimental group (n = 30) or a control group (n = 30). The control group received conventional swallowing therapy, while the experimental group received the same therapy plus sEMG-triggered immersive VR game training. Treatment was provided 5 times per week for 3 weeks. Outcomes included the Kubota Water Swallowing Test (WST), Standardized Swallowing Assessment (SSA), Functional Oral Intake Scale (FOIS), and sEMG root mean square (RMS) values. After 3 weeks, both groups showed significant improvement, with lower WST grades and SSA scores and higher FOIS levels and sEMG RMS values (all P < 0.05). The experimental group achieved significantly greater gains in WST, SSA, FOIS, and RMS values than the control group (all P < 0.05). The total effective rate was 86.67% in the experimental group and 73.33% in the control group, and the distribution of clinical efficacy categories differed significantly between the two groups (Z = 3.15, P = 0.002). No serious training-related adverse events occurred. Immersive, sEMG-triggered VR game training may be a safe and effective adjunct to conventional swallowing therapy for improving short-term swallowing-related outcomes in patients with PSD.
Clinical relevance
In patients with post-stroke dysphagia, does the addition of immersive, sEMG-triggered virtual reality game training to conventional swallowing therapy produce greater improvements in swallowing function and muscle activity compared to conventional therapy alone over a 3-week period? __SNAPSHOT__ {"studyDesign":"Prospective, randomized, single-blind, controlled trial","setting":"Not reported (country and institution type not specified in available abstract)","sampleSize":"n = 60 (experimental: n = 30, control: n = 30)","population":"Adults with confirmed post-stroke dysphagia (PSD); specific inclusion/exclusion criteria, stroke type, stroke severity, time post-stroke, and age distribution not reported in available abstract","intervention":"Conventional swallowing therapy PLUS immersive, sEMG-triggered virtual reality (VR) game training, 5 sessions per week for 3 weeks","comparator":"Conventional swallowing therapy alone, 5 sessions per week for 3 weeks","primaryOutcome":"Not explicitly designated in available abstract; outcomes assessed include Kubota Water Swallowing Test (WST) grade, Standardized Swallowing Assessment (SSA) score, Functional Oral Intake Scale (FOIS) level, and sEMG root mean square (RMS) values","followUp":"3 weeks (end-of-treatment assessment only; no long-term follow-up reported in available abstract)","fundingSource":"Not reported"}
Key findings
Both groups demonstrated statistically significant within-group improvements across all four outcome measures after 3 weeks — lower WST grades, lower SSA scores, higher FOIS levels, and higher sEMG RMS values — with all p-values < 0.05. The experimental group (VR + conventional therapy) achieved significantly greater gains than the control group (conventional therapy alone) across these measures; however, the abstract was truncated at this point, and the specific between-group effect sizes, mean differences, confidence intervals, p-values, and NNT/NNH are not reported in the available text. No safety data or adverse event profile is described in the available abstract, despite 'safety' being referenced in the study title. Absolute and relative effect sizes cannot be calculated from the data provided.
Practice implications
This trial suggests that adding immersive, sEMG-triggered VR game training to standard swallowing rehabilitation may confer additional benefit over conventional therapy alone for patients with post-stroke dysphagia, as measured by validated clinical swallowing scales and objective electromyographic metrics. However, the abstract was truncated before reporting the key between-group quantitative results, preventing full appraisal of the magnitude and precision of the treatment effect. The study population characteristics (stroke type, severity, time from stroke onset, age) are incompletely described in the available abstract, limiting assessment of to whom these findings apply. Patients who are unable to tolerate immersive VR (e.g., those with vestibular sensitivity, severe cognitive impairment, or significant visual deficits) were likely not well-represented. Critically, no long-term follow-up data are reported; it is unknown whether benefits are durable beyond the 3-week treatment window. The safety profile of the VR intervention cannot be assessed from the available abstract. These findings are hypothesis-generating and insufficient alone to change clinical practice; confirmation in larger, adequately powered trials with longer follow-up and full reporting is needed. NOTE: This summary is based solely on the provided abstract, which was truncated; the full publication should be reviewed before clinical application. __LIMITATIONS__ Abstract truncated: between-group effect sizes, confidence intervals, and p-values for the primary comparison are not available for appraisal.,Small sample size (n = 60 total; n = 30 per arm), substantially limiting statistical power and precision of estimates.,Single-blind design: blinding of outcome assessors is implied but not confirmed; treating therapists and patients were not blinded, introducing performance and detection bias.,Short follow-up (3 weeks only): durability of benefit is entirely unknown.,No clearly pre-specified primary outcome: multiple co-equal outcomes reported (WST, SSA, FOIS, sEMG RMS), raising concern for outcome multiplicity and Type I error inflation.,Clinical swallowing outcomes (WST, SSA, FOIS) are not objective instrumental measures (e.g., videofluoroscopy, FEES); penetration-aspiration scale data not reported.,Patient population incompletely characterized in available abstract (stroke type, lesion location, severity, time post-stroke, age, comorbidities not reported).,Funding source not reported, precluding assessment of potential conflicts of interest.,Generalizability uncertain: institutional setting, country, and therapist expertise not described.,No safety data presented despite 'safety' being named in the study title. __BOTTOM_LINE_CATEGORY__ promising_but_preliminary __BOTTOM_LINE__ This small, single-blind RCT (n = 60) found that adding immersive sEMG-triggered VR game training to conventional swallowing therapy produced greater improvements in clinical swallowing measures and muscle activity after 3 weeks in post-stroke dysphagia patients; however, the abstract was truncated before reporting critical between-group effect sizes. Given the small sample, short follow-up, absence of instrumental swallowing assessment, and incomplete data, these results are promising but insufficient to justify routine clinical adoption without confirmation from adequately powered trials with longer follow-up and full outcome reporting.