Mathematical model for preoperative identification of obstructed nasal subsites.

Autor:	Gamerra M; ENT Unit, 'S. Leonardo' Hospital, Castellammare di Stabia, Italy., Cantone E; Department of Neuroscience, ENT Unit, University of Naples 'Federico II', Naples, Italy., Sorrentino G; ENT Unit, 'S. Leonardo' Hospital, Castellammare di Stabia, Italy., De Luca R; Department of Physic 'E. R. Caianiello', University of Salerno, Salerno, Italy., Russo MB; Department of Engineering Second University of Naples, Italy., De Corso E; Catholic University of the Sacred Heart, A Gemelli Hospital, Department of Head and Neck Surgery, Rome, Italy., Bossa F; Neuro Diagnostic Center 'Bossa', Torre del Greco, Italy., De Vivo A; Neuro Diagnostic Center 'Bossa', Torre del Greco, Italy., Iengo M; Department of Neuroscience, ENT Unit, University of Naples 'Federico II', Naples, Italy.
Jazyk:	angličtina
Zdroj:	Acta otorhinolaryngologica Italica : organo ufficiale della Societa italiana di otorinolaringologia e chirurgia cervico-facciale [Acta Otorhinolaryngol Ital] 2017 Oct; Vol. 37 (5), pp. 410-415.
DOI:	10.14639/0392-100X-1385
Abstrakt:	The planning of experimental studies for evaluation of nasal airflow is particularly challenging given the difficulty in obtaining objective measurements in vivo. Although standard rhinomanometry and acoustic rhinometry are the most widely used diagnostic tools for evaluation of nasal airflow, they provide only a global measurement of nasal dynamics, without temporal or spatial details. Furthermore, the numerical simulation of nasal airflow as computational fluid dynamics technology is not validated. Unfortunately, to date, there are no available diagnostic tools to objectively evaluate the geometry of the nasal cavities and to measure nasal resistance and the degree of nasal obstruction, which is of utmost importance for surgical planning. To overcame these limitations, we developed a mathematical model based on Bernoulli's equation, which allows clinicians to obtain, with the use of a particular direct digital manometry, pressure measurements over time to identify which nasal subsite is obstructed. To the best of our knowledge, this is the first study to identify two limiting curves, one below and one above an average representative curve, describing the time dependence of the gauge pressure inside a single nostril. These upper and lower curves enclosed an area into which the airflow pattern of healthy individuals falls. In our opinion, this model may be useful to study each nasal subsite and to objectively evaluate the geometry and resistances of the nasal cavities, particularly in preoperative planning and follow-up. (© Copyright by Società Italiana di Otorinolaringologia e Chirurgia Cervico-Facciale, Rome, Italy.)
Databáze:	MEDLINE
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