Abstract
Aim: Two types of uncuffed paediatric tubes of different designs: a standard tube with a constant internal diameter and a new tube of smooth cone shape were assessed in the model study. Material and Method: The tube resistance to air flow was calculated on the basis of measurements, in which pressure/flow characteristics of the tubes of 3, 3.5 and 4 mm in inner (tracheal) diameter were collected. The flow was controlled by PC and ranged from −30 to +30 lpm. It was measured by a flow sensor (Cole Parmer 00139RN, accuracy: 1%), while the drop of pressure along a tube length was measured by a pressure sensor (JUMO dTrans pO2 B40.4385, accuracy: 0,05%). Patient’s resistive work of breathing (RWOB) was received by simulation of spontaneous breathing of an intubated infant. Simple RC-model of lungs and an endotracheal tube was used for simulation. Results: The air flow resistance of the cone shaped tube was about 40% lower than resistance of the standard tube. RWOB of the virtual infant intubated with the cone tube was decreased by about 20%, in comparison to the situation when a standard tube was used. Conclusion: Using the new cone shaped tube can be more beneficial than the standard tube from a patient’s point of view (when his lungs ventilation is still supported but he is able to breath spontaneously) and ventilation efficiency.
Acknowledgement: The study was done within the framework of the research project 3T11E 02830 financed by the Ministry of Education and Science in 2006–2007 and supported by the Eureka project E! 3126 Multirespi and the Foundation for Polish Science.
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© 2007 International Federation for Medical and Biological Engineering
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Stankiewicz, B., Glapinski, J., Michnikowski, M., Rogalski, A., Rawicz, M., Darowski, M. (2007). Comparison of a standard paediatric tube with a novel tube of unconventional shape. In: Magjarevic, R., Nagel, J.H. (eds) World Congress on Medical Physics and Biomedical Engineering 2006. IFMBE Proceedings, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36841-0_808
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DOI: https://doi.org/10.1007/978-3-540-36841-0_808
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