Biomaterial Database

Standard values of the maximal expiratory flow-volume curve normalized by total lung capacity. 1982

W Hida, and H Sasaki, and T Takishima

Standard values for the maximal expiratory flow-volume (MEFV) curve normalized by total lung capacity (TLC) were obtained in one hundred and fifty healthy men. We compared age dependency and the coefficient of variation of parameters of the MEFV curve, obtained at given percentages of the vital capacity and normalized by height to those of parameters obtained at given percentages of TLC and normalized by TLC (V %TLC/TLC). At low lung volumes, every parameter showed a larger age dependency and a larger coefficient of variation than at high lung volumes. V %TLC/TLC showed almost the same age dependency and almost the same coefficient of variation than the other parameters. However, in pulmonary patients, V %TLC/TLC seems to detect obstructive impairment more readily in spite of the changes in lung volume. It is suggested that V %TLC/TLC would be more helpful in screening for airflow limitation in various pulmonary disorders than other parameters.

UI	MeSH Term	Description	Entries
D008168	Lung	Either of the pair of organs occupying the cavity of the thorax that effect the aeration of the blood.	Lungs
D008173	Lung Diseases, Obstructive	Any disorder marked by obstruction of conducting airways of the lung. AIRWAY OBSTRUCTION may be acute, chronic, intermittent, or persistent.	Obstructive Lung Diseases,Obstructive Pulmonary Diseases,Lung Disease, Obstructive,Obstructive Lung Disease,Obstructive Pulmonary Disease,Pulmonary Disease, Obstructive,Pulmonary Diseases, Obstructive
D008176	Lung Volume Measurements	Measurement of the amount of air that the lungs may contain at various points in the respiratory cycle.	Lung Capacities,Lung Volumes,Capacity, Lung,Lung Capacity,Lung Volume,Lung Volume Measurement,Measurement, Lung Volume,Volume, Lung
D008297	Male		Males
D008449	Maximal Expiratory Flow-Volume Curves	Curves depicting MAXIMAL EXPIRATORY FLOW RATE, in liters/second, versus lung inflation, in liters or percentage of lung capacity, during a FORCED VITAL CAPACITY determination. Common abbreviation is MEFV.	Maximal Expiratory Flow Volume Curves
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D012016	Reference Values	The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality.	Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D001827	Body Height	The distance from the sole to the crown of the head with body standing on a flat surface and fully extended.	Body Heights,Height, Body,Heights, Body
D005540	Forced Expiratory Flow Rates	The rate of airflow measured during a FORCED VITAL CAPACITY determination.	Expiratory Forced Flow Rates,Flow Rates, Expiratory Forced,Flow Rates, Forced Expiratory
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man