Volume-adjusted maximal mid-expiratory flow (Iso-volume FEF25-75%): definition of "Significant" responsiveness in healthy, normal subjects. 1982

P B Boggs, and K D Bhat, and W A Vekovius, and M S Debo

Iso-volume FEF25-75% was evaluated in 30 non-smoking, healthy subjects (16-58 years) to define the percentage change over baseline required for responsiveness to inhaled bronchodilators using this measurement to be significant. The mean percentage change from baseline for Iso-volume FEF25-75% was 15.3% +/- 17.2% (1 SD). Improvement of greater than 49.6% (mean +/- 2 SD) over baseline is required for the change reflected by the Iso-volume FEF25-75% to be significant.

UI MeSH Term Description Entries
D007528 Isoetharine Adrenergic beta-2 agonist used as bronchodilator for emphysema, bronchitis and asthma. Etyprenalinum,Bronkometer,Isoetarin,Isoetharine Mesylate,Mesylate, Isoetharine
D008433 Mathematics The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Mathematic
D008450 Maximal Midexpiratory Flow Rate Measurement of rate of airflow over the middle half of a FORCED VITAL CAPACITY determination (from the 25 percent level to the 75 percent level). Common abbreviations are MMFR and FEF 25%-75%. Forced Expiratory Flow 025-075 Percent,FEF 25-75 Percent,Flow Rate, Maximal Midexpiratory,MMFR,25-75 Percent, FEF,25-75 Percents, FEF,FEF 25 75 Percent,FEF 25-75 Percents,Forced Expiratory Flow 025 075 Percent,Percent, FEF 25-75,Percents, FEF 25-75
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D001993 Bronchodilator Agents Agents that cause an increase in the expansion of a bronchus or bronchial tubes. Bronchial-Dilating Agents,Bronchodilator,Bronchodilator Agent,Broncholytic Agent,Bronchodilator Effect,Bronchodilator Effects,Bronchodilators,Broncholytic Agents,Broncholytic Effect,Broncholytic Effects,Agent, Bronchodilator,Agent, Broncholytic,Agents, Bronchial-Dilating,Agents, Bronchodilator,Agents, Broncholytic,Bronchial Dilating Agents,Effect, Bronchodilator,Effect, Broncholytic,Effects, Bronchodilator,Effects, Broncholytic
D005541 Forced Expiratory Volume Measure of the maximum amount of air that can be expelled in a given number of seconds during a FORCED VITAL CAPACITY determination . It is usually given as FEV followed by a subscript indicating the number of seconds over which the measurement is made, although it is sometimes given as a percentage of forced vital capacity. Forced Vital Capacity, Timed,Timed Vital Capacity,Vital Capacity, Timed,FEVt,Capacities, Timed Vital,Capacity, Timed Vital,Expiratory Volume, Forced,Expiratory Volumes, Forced,Forced Expiratory Volumes,Timed Vital Capacities,Vital Capacities, Timed,Volume, Forced Expiratory,Volumes, Forced Expiratory
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000403 Airway Resistance Physiologically, the opposition to flow of air caused by the forces of friction. As a part of pulmonary function testing, it is the ratio of driving pressure to the rate of air flow. Airway Resistances,Resistance, Airway,Resistances, Airway

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