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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Tidal volume (TV) |
Amount of air used during quiet breathing |
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Inspiration Reserve (IRV) |
Volume that can be inhaled after tidal inspiration |
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Expiratory Reserve (ERV - resting lung volume) |
Volume of air that can be exhaled following passive exhalation |
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Residual Volume (RV) |
Volume of air in lungs after maximum exhalation. Usually about 1/4 of the air in the lungs |
Infants don’t have this |
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Respiratory volumes |
Discrete amounts of air |
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Capacities |
Functional combinations of volumes |
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Inspiratory Capacity (IC) |
Glial amount of air than can be inhaled; maximal inspiratory volume after today expiration IC = TV + IRV |
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Functional residual capacity (FRC) |
Volume of air remaining after passive exhalation FRC = ERV + RV |
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Vital capacity (VC) |
Total amount of air than can be inhaled after a maximal expiration IRV + TV + ERV |
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Total lung capacity (TLC) |
Sum of all the volumes TV + IRV + ERV + RV |
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What influences lung volumes and capacities? |
Anatomical build (heigh, weight, surface area), body position, strength of respiratory musculature, pulmonary compliance, and age |
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When is peak vital capacity reached? |
Teens or early 20’s |
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How does lung capacity change as you age? |
Young adult has 3.5-5 times the lung volume of a 5 year old |
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After peak vital capacity, what takes place? |
Vital capacity decreases along with diaphragmatic action |
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Atmospheric pressure |
Patm -relative 0 against which other pressures are compared |
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Intraoral |
Po Mouth |
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Subglottal pressure |
Ps Below vocal folds |
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Alveolar pressure |
Pal Within alveoli |
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Intrapleural pressure |
Ppl Pleural linkage: always negative |
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Pressure needed for loudness |
An increase in pressure |
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