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Respiratory Volumes and Capacities

Respiratory Volumes and Capacities. Page 414 - 415. Factors . Size Gender Age Physical condition. Tidal Volume (TV). Normal quiet breathing About 500 mL. Inspiratory Reserve Volume (IRV) . Amount of air that can be taken in forcibly over the tidal volume 2100 ml – 3200 ml.

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Respiratory Volumes and Capacities

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  1. Respiratory Volumes and Capacities Page 414 - 415

  2. Factors • Size • Gender • Age • Physical condition

  3. Tidal Volume (TV) • Normal quiet breathing • About 500 mL

  4. Inspiratory Reserve Volume (IRV) • Amount of air that can be taken in forcibly over the tidal volume • 2100 ml – 3200 ml

  5. Expiratory Reserve Volume (ERV) • Amount of air that can be forcibly exhaled after a tidal expiration • About 1200 ml

  6. Residual Volume • Air that cannot be expelled from lungs • Allows gas exchange to occur continuously between breaths • About 1200 ml

  7. Vital Capacity • Total amount of exchangeable air • TV + IRV + ERV

  8. Dead Space Volume • Air that does not reach alveoli • Remains in conducting zone • About 350 ml

  9. Factors Influencing Respiratory Rates and Depth • Physical Factors • Talking; coughing; exercise • Volition (conscious control) • Holding breath • Emotional Factors • Startled; fear; excitement • Chemical Factors • Levels of oxygen and carbon dioxide

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