Purpose: to verify the outcomes of respiratory muscle training (RMT) with flow-oriented incentive spirometer on respiratory function measurements and their relationship with the swallowing biomechanics variables. Methods: 29 subjects underwent training for seven consecutive days (three sets of ten repetitions for inspiration and expiration). The swallowing biomechanics was assessed by video fluoroscopy, using as temporal variable the pharyngeal transit time and as visuoperceptual variables the number of swallows, residues in pyriform sinuses and valleculae, and penetration/aspiration. Respiratory function measurements were assessed by maximal respiratory pressures and spirometry. Results: RMT influenced pharyngeal transit time (p=0.002) and maximal inspiratory pressure correlated with the number of swallows after RMT (ρ=0.62, p=0.01). There was a significant increase in the maximum respiratory pressures post RMT (p<0.0001). Conclusion: RMT increased maximal respiratory pressures and influenced the reduction of pharyngeal transit time. Besides that, there was a relation between the maximum inspiratory pressure and the number of post-training swallows.

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Purpose Dysphagia is an underrecognized concern in people with chronic obstructive pulmonary disease (COPD) and may contribute to disease exacerbations. In this review article, we share information regarding dysphagia in people with COPD, synthesizing knowledge both from the literature and from studies performed in the context of a multidisciplinary clinical pulmonary rehabilitation program at the Federal University of Santa Maria in Brazil. Results This narrative review presents evidence showing that awareness of dysphagia and patient-reported symptoms of dysphagia are rare in individuals with stable COPD. However, evidence from the routine collection of patient-reported symptom data using the Eating Assessment Tool 10 and about dysphagia-related quality of life using the Swallowing Quality of Life questionnaire do suggest that dysphagia is experienced by some individuals with COPD. Several studies suggest that patients with stable COPD present with altered swallowing physiology on videofluoroscopic exams, including silent aspiration in a small number of these individuals. However, both patient self-report and clinical screening using the Volume–Viscosity Swallowing Test have been found to be poor predictors of these videofluoroscopic findings. We discuss the possibility that altered laryngeal sensation and respiratory–swallow discoordination play a role in dysphagia in people with COPD, and highlight assessment tasks that appear to have the highest sensitivity for detecting penetration–aspiration in this population. Finally, we review preliminary evidence suggesting that physical therapy techniques targeting altered respiratory muscle biomechanics may benefit swallowing in people with COPD. Knowledge gaps requiring further research are identified, and implications for clinical practice are discussed.