[Performance of a rescue breathing device with glossopalatinal tube].

The "Lifeway" is a device for rescue breathing consisting of a mouthpiece for the rescuer, a non-rebreathing valve, a mouth-sealing cap and a glosso-palatinal tube (GPT) reaching into the patient's mouth. 54 patients--22 toothless and 32 with firm teeth--were ventilated mechanically via the original "Lifeway", via a variant with additional side-holes in the GPT, and, for comparison, via anaesthesia mask plus oropharyngeal airway and via endotracheal tube. Ventilation was sufficient: The arterial oxygen saturations, measured by pulse oximetry, and the end-tidal CO2 partial pressures were equal to those during ventilation via mask. Placing the modified "Lifeway" in toothless patients was significantly easier than placing the original and as easy as placing the mask; with the patients having firm teeth there were no significant differences. The incidence of obstructions, as registered by impediments to exhalation and by increases in peak inspiratory pressure, was significantly less frequent with the modified device, since the tongue could be "scooped" to a ventro-caudal direction if necessary. The modified "Lifeway" was as effective as the combination of anaesthesia mask and pharyngeal airway. The problems of the latter are, however, avoided; the use of the device by laymen thus seems feasible.