1. Volume 105, Issue 4, Pages 1204-1210 (April 1994)
Synchronized Intermittent Mandatory Ventilation With and Without Pressure Support Ventilation in Weaning Patients With COPD From Mechanical Ventilation 
Vincent Jounieaux, M.D., Alain Duran, M.D., Pierre Levi-Valensi, M.D., F.C.C.P. 
CHEST 
Volume 105, Issue 4, Pages (April 1994)
DOI: /chest
Copyright © 1994 The American College of Chest Physicians Terms and Conditions

2. FIGURE 1
Comparison of the spontaneous tidal volume (sVt) during the weaning in SIMV mode with and without PSV. Data are expressed as mean (bars) + SD. There was a significant difference between the two groups at each step of SIMV rate, throughout the weaning period. Open diamonds=p<0.01, SIMV/PSV vs SIMV, at each step of SIMV rate.
CHEST  , DOI: ( /chest )
Copyright © 1994 The American College of Chest Physicians Terms and Conditions

3. FIGURE 2
Comparison of spontaneous breathing frequency (Sf) during the weaning in SIMV mode with and without PSV. Data are expressed as mean (bars) + SD. There was a significant difference between the two groups at each step of SIMV rate, throughout the weaning period. Open diamonds=p<0.01, SIMV/PSV vs SIMV, at each step of SIMV rate.
CHEST  , DOI: ( /chest )
Copyright © 1994 The American College of Chest Physicians Terms and Conditions

4. FIGURE 3
Comparison of the oxygen cost of breathing (expressed in percentage of the Vo2tot: Vo2resp (percent) during the weaning in SIMV mode with and without PSV. Data are expressed as mean (bars) + SD. There was no significant difference between the two groups at each step of SIMV rate. In each group, there was a significant increase in Vo2resp percent between F.10 and SB steps. Closed star=p<0.01, Vo2resp percent at F.10 vs Vo2resp percent during SB—SIMV/PSV group. Open star=p<0.01, Vo2resp percent at F.10 vs Vo2resp percent during SB—SIMV/PSV group.
CHEST  , DOI: ( /chest )
Copyright © 1994 The American College of Chest Physicians Terms and Conditions

5. FIGURE 4
Comparison of the oxygen cost of breathing per liter of ventilation during the weaning in SIMV mode with and without PSV. Data are expressed as mean + SD. There was no significant difference between the two groups at each step of SIMV rate. In each group, there was a significant variation in Vo2resp/sVE between F.10 and SB steps. Closed star=p<0.01, Vo2resp/sVE at F.10 vs Vo2resp/sVE during SB—SIMV/PSV group. Open star =p <0.01, Vo2resp/sVE at F.10 vs Vo2resp/sVE during SB—SIMV group.
CHEST  , DOI: ( /chest )
Copyright © 1994 The American College of Chest Physicians Terms and Conditions