Incompetent expiratory valve: Signs

Physics, Monitoring, & Devices

An expiratory valve stuck in the open position may be detected by failure of capnogram to return to zero.

Expiratory Valve Dysfunction

  • Stuck Closed: rise in airway pressures, reduced MV
  • Stuck Open: failure of capnogram to return to zero

80%

Answered correctly

2010

Year asked