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Korean J Crit Care Med > Volume 2(2); 1987 > Article
Korean Journal of Critical Care Medicine 1987;2(2): 108-112.
소아중환자 호흡관리시 흡기 - 호기율 ( I : E ratio ) 변화가 가스교환능에 미치는 영향
김성덕, 이청, 임승운
서울대학교 의과대학 마취과학교실
The Effect of I : E ratio on Pulmonary Gas Exchange During Pediatric Respiratory Intensive Care
Seong Deok Kim, Cheong Lee, Seung Woon Lim
Department of Anesthesiology College of Medicine Seoul National University Seoul Korea
The children who received. open heart surgery were mechanically ventilated with Bear 2 volume ventilator postoperatively in pediatric intensive care unit. To clarify the relationship of inspiratory: expiratory ratio to optimum ventilation and oxygenation, all the patients were ventilated at I: E ratios of 1: 2, 1: 1 and 2: 1, at random order, while peak inspiratory pressure, tidal volume and respiratory frequency remained constant. The results showed that the use of a long inspiratory phase resulted in increased PaO2 and decreased alveolar-arterial oxygen difference, indicating improvement in oxygenation, but PaCO2 and dead space(VD/VT) didn't show any changes, indicating no effects on pulmonary ventilation.
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