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Control of ventilation during continuous swallowing
1Faculty of Medicine, University of Calgary, Alberta, Canada.
American Journal of Respiratory and Critical Care Medicine
|November 1, 1994
Summary
Continuous swallowing in adults does not disrupt breathing control. Even with rapid swallowing, the body effectively manages ventilation and breathing patterns during hypercapnia.
Area of Science:
- Physiology
- Respiratory Medicine
Background:
- The upper airway has multiple functions that require coordination.
- Understanding how physiological processes interact is crucial for respiratory health.
Purpose of the Study:
- To investigate the impact of continuous swallowing on ventilatory response to hypercapnia in healthy adults.
- To determine if swallowing overrides normal breathing control mechanisms.
Main Methods:
- Seven healthy adults underwent progressive hypercapnia tests.
- Swallowing was induced via continuous oral water infusion (40-100 ml/min) while breathing nasally.
- Ventilatory response, tidal volume, and breathing frequency were monitored.
Main Results:
- Continuous swallowing (up to 100 ml/min) did not cause coughing or aspiration.
- Swallows altered breathing phases but resulted in compensatory changes in tidal volume and frequency.
- The slope of the ventilatory response to hypercapnia remained unchanged during swallowing.
Conclusions:
- Continuous swallowing does not override ventilatory control in healthy adults.
- The respiratory system can adapt to accommodate swallowing without compromising hypercapnic response.
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