Why Does Prone Positioning Work?

Prone positioning changes distribution of alveolar inflation (Marini 2004, Albert 2000)

  • More homogenous distribution of transplumonary pressure and alveolar inflation
  • Optimize ventilation/perfusion match
  • Gravity effects
  • Triangular
  • Larger surface area posterior
  • Decreased pressure on vena cava when abdomen not constricted
  • Improved alveolar recruitment
  • Shape of lungs
  • Pleural gradient changes
  • Abdomen position