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- W2058607488 abstract "Pressure support ventilation (PSV) is a new ventilator modality that augments spontaneous inspiratory pressure with selected levels of positive airway pressure. There is presently considerable interest in its use in the management of critically ill, ventilator-dependent patients. The optimal method for application has not yet been established. This study investigated the effects of PSV on the oxygen cost of breathing (OCOB), a clinically applicable technique for quantitating the work of breathing. The OCOB and other bedside variables of pulmonary function were measured during PSV in ventilator-dependent patients where weaning was limited by an inability to sustain respiratory work. Nine studies were performed in 8 patients in the surgical intensive care unit. The OCOB, tidal volume (VT), respiratory rate (RR), and minute ventilation (V̇E) were measured at various levels of pressure support. The OCOB was calculated from the difference in oxygen consumption (V̇O2) during mechanical and spontaneous ventilation both at CPAP and with PSV. With increasing levels of PSV, the OCOB was observed to steadily decrease from 22% to 8% (p<0.001). There were also statistically significant increases in VT and decreases in RR. V̇E appeared not to be influenced. The results of this study suggest that the bedside measurement of the OCOB may be an accurate, simple, and reproducible method of titrating the level of applied pressure support in order to optimize respiratory work." @default.
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- W2058607488 date "1992-10-01" @default.
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- W2058607488 title "COULD THE OXYGEN COST OF BREATHING BE USED TO OPTIMIZE THE APPLICATION OF PRESSURE SUPPORT VENTILATION?" @default.
- W2058607488 doi "https://doi.org/10.1097/00005373-199210000-00006" @default.
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