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Mechanical chest-wall vibration does not relieve air hunger
E Bloch-Salisbury1, A P Binks, R B Banzett
1Physiology Program, Harvard School of Public Health, 665 Huntington Ave, Boston, MA 02115, USA. elisabeth.salisbury@umassmed.edu
Respiratory Physiology & Neurobiology
|March 28, 2003
Summary
Mechanical chest wall vibration does not relieve the sensation of air hunger. Researchers found vibration did not alter the urge to breathe during breath holds or reduce air hunger during mechanical ventilation.
Area of Science:
- Respiratory Physiology
- Sensory Neuroscience
Background:
- Mechanical vibration applied to the chest wall is known to reduce dyspnea.
- However, the specific sensations of respiratory discomfort modulated by vibration, such as work/effort, air hunger, or tightness, remain unclear.
Purpose of the Study:
- To investigate whether chest wall vibration can modulate the sensation of air hunger.
- To determine if vibration's effects on dyspnea are specific to certain sensory components.
Main Methods:
- Experiment 1: Eight adults performed breath holds, rating their urge to breathe, with vibration applied to chest wall and control sites at varying amplitudes.
- Experiment 2: Nine adults underwent mechanical ventilation with induced hypercapnia to create air hunger, while vibration was applied to intercostal spaces and a control site.
Main Results:
- Chest wall vibration did not alter breath-hold duration or ratings of the urge to breathe in Experiment 1.
- Vibration applied to the intercostal spaces did not change air hunger ratings compared to triceps vibration in Experiment 2.
Conclusions:
- Mechanical vibration of the chest wall does not relieve the sensation of air hunger.
- The findings suggest that the therapeutic effect of vibration on dyspnea may be specific to the type of respiratory discomfort experienced.
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