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- W2057646416 abstract "Four examiners performed standardized physical examinations on patients who had recently had tests of pulmonary function. Four physical signs were studied: intensity of breath sounds during brisk deep inspiration, palpable tensing of scalene muscles during tidal ventilation, expiratory wheeze, and occurrence of a moist, crackling sound in the expiratory air-flow phase of voluntary cough. A numerical rating system was used to express breath sound loudness. Examiners recorded each of the other three signs as present or absent AD four observations were significantly related to abnormality of the FEV 1 . The eleven possible combinations of two or more signs were evaluated for their ability to estimate the FEV 1 . Two procedures for weighting the data were also tested. The best system used all four observations and both weighting procedures. With this combination, separation of normal and abnormal subjects was 77 percent accurate. Patients classified as normal had an FEV 1 less than 80 percent of predicted one-third of the time, but less than 5 percent of this group had less than 45 percent of predicted FEV 1 . Seventy-six percent of patients classified as mildly abnormal on the basis of the clinical signs had airway obstruction; 20 percent of this group was severely compromised. When the physical examination predicted moderate or severe abnormality, the FEV 1 was below normal 96 percent of the time. Two-thirds of such patients had advanced obstructive disease." @default.
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- W2057646416 date "1980-03-01" @default.
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- W2057646416 title "Combinations of Four Physical Signs as Indicators of Ventilatory Abnormality in Obstructive Pulmonary Syndromes" @default.
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- W2057646416 doi "https://doi.org/10.1378/chest.77.3.354" @default.
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