Monday, June 1, 2009

Waveform of the week: Rise time too slow

Rise time setting too slow as evidence by the sloping pressure waveform.

A slow rise time may cause increased work of breathing for patients with a high inspiratory drive, decreases mean airway pressure & alveolar time which may decrease the delivered tidal volume.

The following video clip demonstrates the increase in tidal volume with the speeding up of rise time to achieve the optimal rectangular pressure waveform.