Respiratory Physiology: Lung Volumes

Key points

• Respiratory physiology: lung volumes The diagram below demonstrates the lung volumes which may be measured: E •• nuj Tidal volume (TV)
• volume inspired or expired with each breath at rest
• 500ml in males, 350ml in females Inspiratory reserve volume (IRV) = 2-3 L
• maximum volume of air that can be inspired at the end of a normal tidal inspiration
• inspiratory capacity = TV + IRV Expiratory reserve volume (ERV) = 750ml