Maximum Static Inspiratory and Expiratory Pressures with Different Lung Volumes
Author Information
Author(s): Christopher G Lausted, Arthur T Johnson, William H Scott, Monique M Johnson, Karen M Coyne, Derya C Coursey
Primary Institution: The Institute for Systems Biology
Hypothesis
Maximum pressures developed by the respiratory muscles can indicate the health of the respiratory system and contribute to respiratory power development.
Conclusion
Maximum pressures at the mouth depend on lung volumes, and equations to describe these pressures have been developed.
Supporting Evidence
- Maximum expiratory pressure increased with volume in both men and women.
- Maximum inspiratory pressure decreased with volume in both men and women.
- Equations developed in the study may be useful for respiratory mechanics models.
Takeaway
This study looked at how much air pressure you can push out or pull in with your lungs at different amounts of air in them, and found some useful math to describe it.
Methodology
Maximum inspiratory and expiratory pressures were measured over a range of lung volumes using a commercial spirometry system.
Potential Biases
Potential bias due to self-selection of participants and the specific demographic of the sample.
Limitations
The study may not represent all populations as subjects were primarily recruited from a specific university.
Participant Demographics
29 female and 19 male adults, average age 25.5 years for females and 26.5 years for males.
Digital Object Identifier (DOI)
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