A HIGH FLOW SEMI-OPEN SYSTEM FOR PREOXYGENATION AN EVALUATION
OOI, R.; JOSHI, P.; SONI, N.; Magill Department of Anaesthesia, Westminster HospitalLondon SW1 2AP
Журнал:
BJA: British Journal of Anaesthesia
Дата:
1992
Аннотация:
We have compared an alternative breathing system for preoxygenation comprising a Hudson face mask with high oxygen inflow (48 litre min<sup>−1</sup>) and a Mapleson A breathing system (100 ml kg<sup>−1</sup> min<sup>−1</sup>). The study consisted of two parts: the first involved adult volunteers (10 male, seven female) and the second part used a lung model for spontaneous ventilation with a sinusoidal venti/atory wave pattern. In the volunteers, preoxygenation was achieved at mean times of 138 (SD 31.3) s and 164 (SD 36.7) s with the high flow semi-open and Mapleson A systems, respectively. In the lung model, at peak inspiratory flow rates of 30 and 40 litre min<sup>−1</sup>, the preoxygenation times were 139 and 120 s, respectively, with the semi-open system and 167 and 156 s with the Mapleson A system. The high flow semi-open system may be an alternative for current techniques, provided peak inspiratory flows are not excessive.
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