Lung volume during swallowing: single bolus swallows in healthy young adults.
OBJECTIVE
This study examined the relationship between swallowing and lung volume initiation in healthy adults during single swallows of boluses differing in volume and consistency. Differences in lung volume according to respiratory phase surrounding the swallow were also assessed.


METHODS
Nine men and 11 women between the ages of 19 and 28 years served as study participants. Lung volume and respiratory phase data were recorded as each participant completed 5 trials each of 10-mL and 20-mL water boluses by cup, and thin and thick paste boluses by spoon, presented in randomized order.


RESULTS
Significant differences in lung volume at swallow initiation were found based on bolus consistency but not on bolus volume. No differences were found for lung volume initiation based on the respiratory phase surrounding the swallow or for the respiratory pattern based on bolus volume or consistency.


CONCLUSIONS
Findings of this study extend the existing knowledge base regarding the interaction of the swallow and respiratory systems by identifying targeted lung volumes at swallow initiation. In addition to other swallow-related biomechanical events and respiratory phase relationships surrounding a swallow, the lung volume at swallow initiation may be an important consideration when investigating swallow physiology and physiopathy.
Wheeler Hegland
Karen M
KM
Arizona State University, Tempe, AZ, USA. kwheeler@csd.ufl.edu
Huber
Jessica E
JE
Pitts
Teresa
T
Sapienza
Christine M
CM
D000328:Adult; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D003679:Deglutition / Q000502:physiology*; D004576:Electromyography; D005260:Female; D006801:Humans; D008168:Lung / Q000502:physiology*; D008297:Male; D015588:Observer Variation; D015656:Respiratory Mechanics / Q000502:physiology*; D055815:Young Adult