Efficacy of flow-by during continuous positive airway pressure ventilation.
We investigated clinically the differences in respiratory work of patients imposed by three modes of one ventilator: the flow-by system, the demand valve system, and the pressure support system. Inspiratory work using flow-by and pressure support systems was reduced sufficiently when compared to the demand valve system. Moreover, fluctuation of the airway pressure was minimal with the flow-by mode. These results suggest that the flow-by mode is beneficial to patients breathing spontaneously with continuous positive airway pressure.
Saito
S
S
Department of Anesthesiology and Resuscitology, Okayama University Hospital, Japan.
Tokioka
H
H
Kosaka
F
F
D000368:Aged; D000403:Airway Resistance; D006801:Humans; D008875:Middle Aged; D011175:Positive-Pressure Respiration / Q000295:instrumentation; D012123:Pulmonary Ventilation; D014939:Work of Breathing