Summary
A study was carried out on a modification of the Mapleson D system to determine accurately the patient's inflow requirements during controlled ventilation. This study utilized the Radford Nomogram as a guide. It was concluded that the Radford nomogram calculation corrected only for intubation or an inflow of 70 ml/kg/min was a reliable guide for determining the inflow requirements to maintain mild hyperventilation. This system is dependent upon inflow only if the respirator minute ventilation exceeds the inflow.
Résumé
Nous avons fait une étude sur une modification de système Mapleson D pour déterminer de façon précise les besoins inspiratoires du malade au cours de la ventilation contrôlée. Au cours de cette étude, nous avons utilisé, comme guide, le nomogramme de Radford. Nous en venons à la conclusion que le calcul du nomogramme de Radford corrigé seulement pour l'intubation ou un volume inspiratoire de 70 ml/kg/min constituait un guide fiable pour déterminer les exigences inspiratoires pour maintenir une légère hyperventilation. Ce système dépend sur l'inspiration seulement si le volume minute du respirateur excède le volume inspiratoire.
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Bain, J.A., Spoerel, W.E. Flow requirements for a modified mapleson D system during controlled ventilation. Canad. Anaesth. Soc. J. 20, 629–636 (1973). https://doi.org/10.1007/BF03026260
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DOI: https://doi.org/10.1007/BF03026260