Clinically Proven Rehabilitation Technology
RS REHAB develops medical rehabilitation technologies based on over 20 years of clinical research in dysphagia and rehabilitation medicine, originating from Seoul National University Hospital.
4-Channel Sequential Neuromuscular Electrical Stimulation
Conventional dysphagia electrical stimulation systems activate multiple muscles simultaneously, which differs from the physiological swallowing pattern.
RS STIM is designed based on the sequential activation algorithm of swallowing-related muscles, where four independent channels deliver stimulation with precisely controlled time delays.
Peer-Reviewed Scientific Evidence
The clinical efficacy and technological superiority of RS STIM have been validated through multiple randomized controlled trials published in internationally recognized SCI(E)-indexed journals.
Residual effect of sequential 4-channel NMES evaluated by high-resolution manometry
Lim J et al. · Corresponding author: Ryu JS (Seoul National University Bundang Hospital)
- •High-resolution manometry (HRM) study in 9 healthy volunteers and 9 patients with dysphagia
- •Significant increases in maximal pharyngeal pressure and pressure area during stimulation
- •Improved pressure parameters tended to persist after the stimulation ended
Kinematic mechanism of the rehabilitative effect of 4-channel NME
Lim J et al. · Corresponding author: Ryu JS (Seoul National University Bundang Hospital)
- •Post-hoc kinematic analysis based on randomized clinical trial data
- •Demonstrated improvement in hyoid displacement and pharyngeal movement
- •Clarified the rehabilitative mechanism of 4-channel electrical stimulation
Clinical effectiveness of the sequential 4-channel NMES
Seo KH et al. · Corresponding author: Ryu JS (Seoul National University Bundang Hospital)
- •Randomized, double-blind controlled trial
- •Comparison between 4-channel sequential NMES and conventional 2-channel NMES
- •The 4-channel sequential NMES demonstrated significantly superior improvement in swallowing function compared to conventional therapy
Compensatory Effects of Sequential 4-Channel NMES
Lee SY et al. · Corresponding author: Ryu JS (Seoul National University Bundang Hospital)
- •Prospective randomized clinical trial
- •Included patients with acute, subacute, and chronic dysphagia
- •Demonstrated compensatory kinematic effects and functional improvement across all stages of dysphagia
Normal contractile algorithm of swallowing muscles
Park D et al. · Corresponding author: Ryu JS (Seoul National University Bundang Hospital)
- •Physiological study using needle electromyography (EMG)
- •Revealed that swallowing-related muscles are activated in a sequential algorithm rather than simultaneous contraction
- •Provides the mechanistic foundation for 4-channel sequential stimulation
Prediction of laryngeal aspiration using voice analysis
Ryu JS, Park SR, Choi KH · Asan Medical Center, University of Ulsan College of Medicine
- •Demonstrated the feasibility of predicting aspiration risk using voice analysis
- •Serves as the scientific foundation for RS DETECTION: AI-based aspiration risk assessment