Effortful swallow with resistive electrical stimulation training improves pharyngeal constriction in patients post-stroke with dysphagia

Summary

This study aimed to evaluate the effect of effortful swallow combined with surface electrical stimulation as a form of resistance training on pharyngeal constriction function in post-stroke patients with dysphagia. Nineteen patients post-stroke with dysphagia received 20 minutes effortful swallow training with resistive electrical stimulation for 5 days per week for 4 weeks. Electrical stimulation was applied on the infrahyoid area as resistance against hyoid elevation. Stimulation intensity was adjusted daily up to the maximum tolerable level of the participant. Blinded biomechanical measurements of the extent of hyoid elevation were taken and the pharyngeal constriction ratio (PCR) determined after training. The change of the PCR and the relationship between hyoid elevation and the PCR were evaluated. The post-training PCR was significantly decreased compared to pre-training PCR (p<0.05). There was a high inverse correlation between the hyoid elevation and the PCR (r= -1.992, p<0.05). Effortful swallow with resistive electrical stimulation training increases pharyngeal constriction. It can be used as a treatment to improve pharyngeal constriction in patients with dysphagia.

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