Spirometers

• • An individual's breathing can be measured and analysed using a piece of equipment called a spirometer
• • Spirometers can be used by an individual at rest or during exercise, e.g. running on a treadmill
• Tidal Volume 


  • The volume of air breathed in and out with each normal breath
• Inspiratory reserve volume

  • The difference between the tidal volume and the total volume of air breathed in during a deep inhalation
• Expiratory reserve volume

  • The difference between the tidal volume and the total volume of air breathed out during an active exhalation
• Residual volume

  • The volume of air that remains in the lungs even after a maximal exhalation
• • At rest, tidal volume is approximately 500ml