The Correlation of Peak Flow Rate with Maximal Expiratory Flow Rate, One-Second Forced Expiratory Volume, and Maximal Breathing Capacity¹

Comparison Between Peak Expiratory Flow Rates (PEFR) and FEV1 in the Monitoring of Asthmatic Subjects at an Outpatient Clinic

“…(2) a diagnosis of asthma according to American Thoracic Society (ATS) criteria;'3 (3) FEV, and PEFR measurements at each visit; and (4) best achieved FEV1 value of at least 1.4 L (prebronchodilator or postbronchodilator). Overall, 197 subjects who met these criteria were included in the study and the data were obtained for two consecutive visits per patient.…”

Can Peak Expiratory Flow Measurements Estimate Small Airway Function in Asthmatic Children?

“…As many as one third of the patients who are in clinically stable condition have FEV 1 values below the lower limit of the normal range, [1][2][3][4] and about 50% of clinically stable asthmatic patients have abnormal values for forced expiratory flow at 50% of vital capacity (FEF 50 ). 3 Peak expiratory flow (PEF) has been found to correlate well with FEV 1 in different studies [5][6][7][8][9][10][11][12][13][14] with r values ranging from 0.74 to 0.93. Since measuring PEF at home using a simple peak flowmeter is easier than measuring FEV 1 , the use of PEF measurement on a daily basis has been recommended by international guidelines for asthmatic patients having more than mild disease.…”

Etude comparative du Peak Flow Rate et de la Spirographie

“…Signalons enfin que les autres auteurs [1,5,6,7] qui se sont intéressés à la corrélation entre D E P et VEMS et P o n t tro u v ée excel len te, n 'ont pas considéré séparém ent les cas norm aux, obstructifs et restrictifs.…”