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is the area of the duct, is the velocity of the fluid. The practicalities of mine ventilation led Atkinson to group some of these variables into one all-encompassing term: Area and perimeter were incorporated because mine airways are of irregular shape, and both vary along the length of an airway.
However, they are seldom used as the actual basis of design or calculation. For example, residential ventilation rates are calculated based on area of the residence and number of occupants. [ 5 ] Non-residential ventilation rates are based on floor area and number of occupants, or a calculated dilution of known contaminants. [ 6 ]
Mean airway pressure has been shown to have a similar correlation as plateau pressure to mortality. [6]MAP is closely associated with mean alveolar pressure and shows the stresses exerted on the lung parenchyma on mechanical ventilation.
An area with ventilation but no perfusion (and thus a V/Q undefined though approaching infinity) is termed "dead space". [ 6 ] Of note, few conditions constitute "pure" shunt or dead space as they would be incompatible with life, and thus the term V/Q mismatch is more appropriate for conditions in between these two extremes.
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Display a year or month calendar Template parameters [Edit template data] Parameter Description Type Status Year year the ordinal year number of the calendar Default current Number suggested Month month whether to display a single month instead of a whole year, and which one Default empty Example current, next, last, 1, January String suggested Show year show_year whether to display the year ...
TLC: Total lung capacity: the volume in the lungs at maximal inflation, the sum of VC and RV. TV: Tidal volume: that volume of air moved into or out of the lungs in 1 breath (TV indicates a subdivision of the lung; when tidal volume is precisely measured, as in gas exchange calculation, the symbol TV or V T is used.)
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