Comparison of four methods of preoxygenation.
We studied four different techniques of preoxygenation in 20 healthy volunteers, by continuous analysis of respired gases. Three minutes of tidal breathing from a Magill breathing system or four vital capacity breaths from a non-rebreathing system were found to be equally effective, whereas four vital capacity breaths from a Magill breathing system were less effective. Maximal expiration before application of the face mask resulted in improved oxygenation when four vital capacity breaths were taken from a Magill system.
McCrory
J W
JW
Department of Anaesthesia, Royal Victoria Infirmary, Newcastle upon Tyne.
Matthews
J N
JN
D000328:Adult; D000769:Anesthesia, Inhalation / Q000379:methods*; D002245:Carbon Dioxide / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D010100:Oxygen / Q000008:administration & dosage* / Q000502:physiology; D012119:Respiration / Q000502:physiology*; D013990:Tidal Volume; D013997:Time Factors; D014797:Vital Capacity / Q000502:physiology
D002245:Carbon Dioxide; D010100:Oxygen