Respiratory Volumes and Capacities

Measurement of Respiratory Volumes and Capacities

• Tidal Volume (TV):

  • Adult Male: 500 ml
  • Adult Female: 500 ml
  • Description: Air inhaled/exhaled per breath at rest.

• Inspiratory Reserve Volume (IRV):

  • Adult Male: 3100 ml
  • Adult Female: 1900 ml
  • Description: Air forcefully inhaled after normal inspiration.

• Expiratory Reserve Volume (ERV):

  • Adult Male: 1200 ml
  • Adult Female: 700 ml
  • Description: Air forcefully exhaled after normal expiration.

• Residual Volume (RV):

  • Adult Male: 1200 ml
  • Adult Female: 1100 ml
  • Description: Air remaining in lungs after forced expiration.

• Total Lung Capacity (TLC):

  • Adult Male: 6000 ml
  • Adult Female: 4200 ml
  • Formula: $TLC = TV + IRV + ERV + RV$
  • Description: Max air in lungs after max inspiration.

• Vital Capacity (VC):

  • Adult Male: 4800 ml
  • Adult Female: 3100 ml
  • Formula: $VC = TV + IRV + ERV$
  • Description: Max air expired after max inspiration.

• Inspiratory Capacity (IC):

  • Adult Male: 3600 ml
  • Adult Female: 2400 ml
  • Formula: $IC = TV + IRV$
  • Description: Max air inspired after normal expiration.

• Functional Residual Capacity (FRC):

  • Adult Male: 2400 ml
  • Adult Female: 1800 ml
  • Formula: $FRC = ERV + RV$
  • Description: Air remaining after normal expiration.