• Eur J Anaesthesiol · Sep 2003

    Effect of catheter design on tracheal pressures during tracheal gas insufflation.

    • I R Dyer, M Esmail, G Findlay, J S Mecklenburgh, and J Dingley.
    • Morriston Hospital, Swansea, UK.
    • Eur J Anaesthesiol. 2003 Sep 1; 20 (9): 740-4.

    Background And ObjectiveThis 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.MethodsEach device was tested using insufflation flow rates of 5 and 10 L min(-1). For each flow rate, the pressure within the tracheal model was measured at 33 fixed points.ResultsThe Boussignac tracheal tube produced the most even pressure distribution, while a reverse-flow catheter produced pressure changes of the smallest magnitude.ConclusionsWe suggest that catheters producing the lowest pressure changes are likely to be safer for clinical use.

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