The Science Journal of the American Association for Respiratory Care
Background: We have reported that PAV and PSV modes resulted in similar intubation rates and mortality in pts with ARF (Am J Resp Crit Care 1999; 159:A14). We wished to test whether excessive effort by RTs was needed and provided to patients for the PAV vs PSV mode.
Methods: Pts with ARF were randomized to receive PAV or PSV mode and we prospectively charted both the number of times pts needed encouragement (#ENC) to continue and how many inspiratory ventilator setting changes (#IPAP) were required for optimizing each mode.
Results: There was a significantly higher %pts encouraged (p < 0.02) and more total pt encouragement episodes (p < 0.04) for PSV mode
(Mean ± SD %Pts-PSV vs PAV=44 ± 10 vs 22 ± 13; Total #ENC-PSV vs PAV= 19.5 ± 15.2 vs 7.5 ± 6.2). There was no significant difference (p > 0.15) in the #IPAP changes between the 2 modes (#IPAP-PSV vs PAV=2.8 ± 1.9 vs 5.5 ± 3.1). The #ENC for the first 6 hours is shown.
Conclusions: PAV mode required similar ventilator setting changes and less pt encouragement effort than PSV mode in this clinical trial.
Study funded by Respironics Inc. Murraysville, PA.
(See Original for Figure)