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Background and objective: This study investigated the distribution of pressures within a model trachea, produced by five different tracheal gas insufflation devices. The aim was to suggest a suitable design of a tracheal gas insufflation device for clinical use. Methods: Each device was tested using insufflation flow rates of 5 and 10 L min[sup -1]. For each flow rate, the pressure within the tracheal model was measured at 33 fixed points. Results: The Boussignac tracheal tube produced the most even pressure distribution, while a reverse-flow catheter produced pressure changes of the smallest magnitude. Conclusions: We suggest that catheters producing the lowest pressure changes are likely to be safer for clinical use. [ABSTRACT FROM AUTHOR]

Cites findings of a study conducted to analyze the effectiveness of heart rate as a measure of psychological stress during real and simulated anaesthetic emergencies. Use of Holter monitor on the subjects of the study; Heart rate of a trainee during a simulated failure to intubate and ventilate; Link between real anaesthetic emergency and rise in heart rate; Differences in the heart rate change during the simulator scenario.