Monday, March 2, 2009

Waveform of the week: Ineffective Efforts

This image shows abrupt decreases in flow which are not followed by a mechanical breath, this indicates ineffective efforts.

Common Causes include:
  • Low respiratory drive.
  • Addition of extra flow to the ventilator circuit during nebulizer treatments. 
note- cardiac oscillations maybe confused with ineffective efforts, particularly if the stroke volume is high.


Waveform of the week: Auto-PEEP

The affect of in-line medication delivery in regards to patient-ventilator trigger synchrony

The intrinsic diaphragmatic frequency