Lung volumes extra

• Spirometry:

  • A Spirometer can measure most lung volumes
  • Not all lung volumes can be measured using simple spirometry
• Why assess spirometry?

  • Diagnosis of respiratory disease
  • Monitoring to assess:
  • Diagnosis progression
  • Deterioration
  • Drug efficiency
  • Efficient drug delivery system
• Measuring Residual Volume and Functional Residual Capacity:

  • RV can not be expired
  • RV and FRC can not be measured with simple spirometry
  • Use gas dilution technique or body plethysmography
• Factors affecting lung volumes:

  • Body size
  • Age
  • Gender
  • Muscle training
  • Disease