Der Anaesthesist
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Randomized Controlled Trial Comparative Study Clinical Trial
[Preoxygenation with the NasOral((R)) system or the standard face mask?].
Adequate preoxygenation of patients before onset of apnea for orotracheal intubation is of major importance in general anaesthesia. Various preoxygenation techniques are available but a face mask providing an oxygen supply via the circle absorber system of a mechanical respirator is most frequently used. Recently, a new device for preoxygenation - the NasOral((R)) system - has become available. The aim of the present study was to compare the efficacy of intrapulmonary oxygen storage with either the NasOral((R)) device or the standard face mask. ⋯ Both the NasOral((R)) system and the face mask are effective for intrapulmonary oxygen storage. In both systems the O(2) flow has to be adequately high and the masks have to be held tightly in order to avoid any contamination of the inhaled oxygen with nitrogen. Due to its unidirectional flow, the NasOral((R)) system additionally requires the patient to be cooperative. As the NasOral((R)) system is more expensive and has no clinical advantages without apneic oxygenation, we prefer the standard face mask for patient preoxygenation.