ASV adaptive support ventilation

  • adapts to respiratory frequency
  • initially for CSA
    • with normal CO2: cheynne stokes, CHF, high altitude, encephalopathy
    • with elevated CO2:
      • congenital or acquired central hypoventilation
  • adjusts PS for cheynne tokes
  • only for EF > 40%
  • complex sleep apnea
    • initially obstructive then CSA
    • wait 3 months, then ASV