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19 Cards in this Set
- Front
- Back
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spirometer
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the volume of air a person inhales and exhales is measured with this
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bell spirometer
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consists of a double walled cylinder in which an inverted bell filled with oxygen enriched air is immersed in water.
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spirogram
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the record of volume change vs time as measured by by a spirometer
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tidal volume (TV)
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the volume of air inspired or expired during a single breath
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inspiration reserve volume (IRV)
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the volume of air that can be maximally inhaled at the end of a tidal inspiration
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expiration reserve volume (ERV)
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the volume of air that can be maximally exhaled at the end of a tidal expiration
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residual volume (RV)
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the volume of gas remaining in the lungs at the end of a maximal expiration
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Pulmonary capacity
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is the sum of two or more primary lung volumes
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Inspiratory capacity (IC)
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IC= TV + IRV
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expiratory capacity (EC)
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EC= TV + ERV
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functional residual capacity (FRC)
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FRC= ERV + RV
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vital capacity (VC)
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VC = IRV + TV + ERV
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Total lung capacity (TLC)
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TLC= IRV + TV + ERV + RV
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Normal Tidal Volume
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500ml, during exercise this can be more than 3 liters
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Normal Inspiration reserve volume
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3000-3300ml in males and 1900ml in females
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normal expiratory reserve volume
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1000- 1200ml in males and 700ml in females
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normal residual volume
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1200-1300ml in males and 1100 in females
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Equations for Predicted vital capacity
MALE |
V.C. (liters)=.052H(cm) - .022A(yrs)-3.6
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Equations for Predicted vital capacity FEMALE
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V.C.(Liters)=.041H(cm)-.018A(yrs)-2.69
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