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Investigation into Deep Breathing through Measurement of Ventilatory Parameters and Observation of Breathing Patterns
Published on: September 16, 2019
Breathing pattern and ventilatory control in chronic tetraplegia
Ann M Spungen1, William A Bauman, Marvin Lesser
1VA RR&D Center of Excellence for the Medical Consequences of SCI, James J. Peters VA Medical Center, Room 1E-02, 130 West Kingsbridge Road, Bronx, NY, 10468, USA. ann.spungen@va.gov
Individuals with tetraplegia exhibit impaired respiratory control during resting breathing, showing reduced minute ventilation and sigh frequency. This suggests a diminished respiratory drive in this population, extending previous findings.
Area of Science:
- Respiratory Physiology
- Neurology
- Rehabilitation Medicine
Background:
- Respiratory control impairment is known in tetraplegia during stimulated breathing (e.g., CO2 challenges).
- Resting breathing patterns and respiratory control during quiet breathing in tetraplegia remain less understood.
- Sighs are crucial for lung maintenance and may reflect respiratory drive.
Purpose of the Study:
- To evaluate respiratory control during resting breathing in individuals with tetraplegia.
- To assess sigh frequency in persons with tetraplegia compared to able-bodied controls.
- To investigate the relationship between breathing pattern parameters and sigh frequency.
Main Methods:
- A prospective, comparative study involving ten tetraplegia outpatients and eight able-bodied controls.
- Noninvasive monitoring of breathing patterns (Tidal Volume, Inspiratory Time) for one hour at rest.
- Calculation of Minute Ventilation, Volume per Inspiratory Time (V(T)/T(I)), and sigh frequency (breaths >2x mean V(T)).
Main Results:
- Tetraplegia group showed significantly reduced minute ventilation (5.24 vs 7.16 L/min).
- Volume per Inspiratory Time (V(T)/T(I)) was significantly lower in tetraplegia (208 vs 284 ml/s).
- Sigh frequency was markedly reduced in tetraplegia (11 vs 42 sighs/h).
- V(T)/T(I) correlated with sigh frequency in both groups.
Conclusions:
- Reduced minute ventilation, V(T)/T(I), and sigh frequency indicate diminished respiratory drive during resting breathing in tetraplegia.
- These findings highlight respiratory control deficits beyond stimulated breathing conditions.
- Impaired resting respiratory control may have implications for respiratory health in individuals with tetraplegia.
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