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Lung
volumes and capacities
By
Dr. Mostafa Sayed
Lung volumes
 Tidal volume (TV) 500 cc.
 Insp. reserve volume (IRV) 3000 cc.
 Exp. reserve volume (ERV) 1100 cc.
 Residual volume (RV) 1200 cc.
Lung capacities
 Insp. capacity (IC) 3500 cc = TV + IRV.
 Functional residual capacity (FRC) 2300
cc = ERV + TV.
 Total lung capacity (TLC) 5800 cc = IC +
F.R.C.
 Vital capacity (VC) 4600 cc = ERV + I.C.
 Timed vital capacity (FEV1) = 83 % of
expired air at first second i.e. the fraction
of vital capacity at first second.
5- Lung volumes.pptx

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5- Lung volumes.pptx

  • 2. Lung volumes  Tidal volume (TV) 500 cc.  Insp. reserve volume (IRV) 3000 cc.  Exp. reserve volume (ERV) 1100 cc.  Residual volume (RV) 1200 cc.
  • 3.
  • 4. Lung capacities  Insp. capacity (IC) 3500 cc = TV + IRV.  Functional residual capacity (FRC) 2300 cc = ERV + TV.  Total lung capacity (TLC) 5800 cc = IC + F.R.C.  Vital capacity (VC) 4600 cc = ERV + I.C.  Timed vital capacity (FEV1) = 83 % of expired air at first second i.e. the fraction of vital capacity at first second.