Monitoring Physicians are notoriously unreliable at clinically detecting airflow obstruction [Am J Med 68: 11, 1980], thus we rely on objective measures. FEV1/FVC < 0.7 is indicative of obstructive disease but is difficult to obtain at the bedside. Peak expiratory flow rate ranges from 500 to 700 L/min in men and 380 – 500 L/min […]