Differences in Dysphagia between Patients with Stroke or Amyotrophic Lateral Sclerosis
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Objective: Dysphagia is a common symptom of stroke and affects 23–50% of such patients. In addition, bulbar involvement, which causes dysphagia, is the primary initial symptom in approximately 25–30% of amyotrophic lateral sclerosis (ALS) patients. The purpose of this study was to compare patterns of swallowing difficulties in stroke and ALS patients. Methods: We retrospectively recruited 84 ALS patients with dysphagia and 294 stroke patients with dysphagia between January 2017 and December 2019. Swallowing processes were reviewed by videofluoroscopic swallowing studies (VFSSs). The presence of oral residues and oral transit times (OTTs) were measured in the oral phase, and the presence of penetration and aspiration and residues in valleculae or pyriform sinuses were evaluated. Statistical analysis was performed using SPSS 25.0 and comparisons using the Chi-square test. Results: ALS patients more frequently had delayed OTTs and oral residues than stroke patients, and stroke patients more frequently experienced aspiration and had delayed thin liquid pharyngeal transit times (PTTs). However, no significant intergroup difference was observed for the presence of penetration, residues in valleculae or pyriform sinuses, or thick liquid PTTs. Conclusion: The study shows that ALS patients exhibit slower food processing in the oral cavity and more significant bulbar muscle weakness than stroke patients. On the other hand, stroke patients had greater thin liquid aspiration rates than ALS patients. These findings should be considered when choosing treatments for ALS and stroke.
Abstract
Objective: Dysphagia is a common symptom of stroke and affects 23–50% of such patients. In addition, bulbar involvement, which causes dysphagia, is the primary initial symptom in approximately 25–30% of amyotrophic lateral sclerosis (ALS) patients. The purpose of this study was to compare patterns of swallowing difficulties in stroke and ALS patients. Methods: We retrospectively recruited 84 ALS patients with dysphagia and 294 stroke patients with dysphagia between January 2017 and December 2019. Swallowing processes were reviewed by videofluoroscopic swallowing studies (VFSSs). The presence of oral residues and oral transit times (OTTs) were measured in the oral phase, and the presence of penetration and aspiration and residues in valleculae or pyriform sinuses were evaluated. Statistical analysis was performed using SPSS 25.0 and comparisons using the Chi-square test. Results: ALS patients more frequently had delayed OTTs and oral residues than stroke patients, and stroke patients more frequently experienced aspiration and had delayed thin liquid pharyngeal transit times (PTTs). However, no significant intergroup difference was observed for the presence of penetration, residues in valleculae or pyriform sinuses, or thick liquid PTTs. Conclusion: The study shows that ALS patients exhibit slower food processing in the oral cavity and more significant bulbar muscle weakness than stroke patients. On the other hand, stroke patients had greater thin liquid aspiration rates than ALS patients. These findings should be considered when choosing treatments for ALS and stroke.
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