Grid sensitivity studies for validation of human upper airways
نویسندگان
چکیده
منابع مشابه
Micro Particles Transport and Deposition in Realistic Geometry of Human Upper Airways
Realistic geometry of human upper airways from mouth to the end of trachea was reconstructed by implementing the CT-Scan images of a male subject. A computational model for analyzing the airflow in the airways was developed and several simulations were performed. To capture the anisotropy of the inhaled airflow in the upper airways, the Reynolds stress transport model of turbulence was used ...
متن کاملAssessment of upper airways obstruction.
An indication of obstruction to the upper airways (trachea and larynx) may be obtained by calculating the ratio of the forced expired volume in one second to the peak expiratory flow rate (FEV(1)/PEFR). This index was found to be usually less than 10 in normal subjects (mean 7.3), and in patients with asthma (mean 6.9), chronic bronchitis (mean 7.7), or interstitial lung disease (mean 6.3). A s...
متن کاملMicro Particle Transport and Deposition in Human Upper Airways
The hazard caused by inhaled particles depends on the site at which they deposit within the respiratory system. Knowledge of respiratory aerosol deposition rates and locations is necessary to (1) evaluate potential health effects and establish critical exposure limits and (2) design effective inhaled medications that target specific lung regions. Particles smaller than 10 μm in diameter can be ...
متن کاملFlow-limitation and upper airways.
We read with interest in the February 1995 issue of The European Respiratory Journal the article by KOULOURIS et al. [1] "A simple method to detect expiratory flowlimitation during spontaneous breathing". The authors applied negative pressure at the mouth (-5 cmH2O) during a tidal expiration (NEP) to 22 patients with chronic obstructive lung disease. They conclude that this provides a simple, n...
متن کاملCephalometric Analysis of Upper Airways in Adults with Class II Malocclusion in Qazvin
Background: Unusual enlargement of nasopharynx can disrupt air flow through the nose. The aim of this study was to investigate the cephalometric parameters in the upper airways. Methods: This retrospective descriptive study was conducted on 32 adults with Class II malocclusion without the history of night apnea in Qazvin. The radiographs were obtained from the...
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ژورنال
عنوان ژورنال: IOP Conference Series: Materials Science and Engineering
سال: 2020
ISSN: 1757-899X
DOI: 10.1088/1757-899x/932/1/012107