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The effect of different locations of tracheal stenosis to the flow characteristics using reconstructed CT-scanned image

Johari, Nasrul Hadi and Osman, Kahar and Mohd. Salleh, Zuliazura and Haron, Juhara and Abdul Kadir, Mohammed Rafiq (2012) The effect of different locations of tracheal stenosis to the flow characteristics using reconstructed CT-scanned image. Journal of Mechanics in Medicine and Biology, 12 (4). pp. 1-15. ISSN 0219-5194

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Official URL: https://www.worldscientific.com/doi/abs/10.1142/S0...

Abstract

The presence of tracheal stenosis would alter the flow path of the inhaled and exhaled air and subsequently changed the flow behavior inside the trachea and main bronchi. Therefore, it was our aim to investigate and predict the changes of flow behavior along with the pressure distribution with respect to the presence of stenosis on the tracheal lumen. In this study, actual CT scan images were extracted for flow modeling purposes. The images were then reconstructed to mimic the effect of different stenosis locations. This method overcomes the problem of the absence of actual images for different tracheal stenosis locations. The flow was subjected to different breathing situations corresponding to low, moderate and rigorous activities. The results showed that for flow over the stenosis farthest from the bifurcation, the pressure drop was insignificant for all breathing situations. At the same time, the inlet flow rate at the bifurcation showed less air flows into the right lung as compared to healthy flow conditions. On the other hand, for the flow over stenosis closest to the bifurcation, the pressure drop near the bifurcation area was very significant at high flow rate.

Item Type:Article
Uncontrolled Keywords:Tracheal stenosis, CT-scan images, pressure drop and flow rates
Subjects:Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions:Biosciences and Medical Engineering
ID Code:33880
Deposited By: Fazli Masari
Deposited On:24 Sep 2013 07:58
Last Modified:31 Oct 2018 20:37

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