Diagnosis of Emphysema

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Presentation transcript:

Diagnosis of Emphysema D.S. McCarthy, M.D., M. Robertson, M.D., G. Simon, M.D. CHEST Volume 68, Issue 1, Pages 46-50 (July 1975) DOI: 10.1378/chest.68.1.46 Copyright © 1975 The American College of Chest Physicians Terms and Conditions

Figure 1 The relationship between lung volume and maximal expiratory flow rate (MEFR) in subjects with normal chest films (•), those with limited (▪) and those with widespread (×) radiologic emphysema. Flow is expressed as total lung capacity (TLC per sec) to correct for possible differences in lung size. Control subjects (▵); ×±SD. CHEST 1975 68, 46-50DOI: (10.1378/chest.68.1.46) Copyright © 1975 The American College of Chest Physicians Terms and Conditions

Figure 2 The relationship between lung volume and static transpulmonary pressure in subjects with normal chest films (•), those with limited (▪) and those with widespread (×) radiologic emphysema. Volume is expressed as percent predicted total lung capacity (TLC) to correct for possible differences in lung size. Control subjects (▵); ×±SD. CHEST 1975 68, 46-50DOI: (10.1378/chest.68.1.46) Copyright © 1975 The American College of Chest Physicians Terms and Conditions

Figure 3 The relationship between the maximum recoil pressure and the radiologic category of emphysema in control subjects (▵), patients with normal chest films (•), those with limited (▪) and those with widespread (×) radiologic emphysema. Patients with normal chest radiographs were subdivided into two groups depending upon whether maximum recoil pressure was greater or less than 10 cm H2O (dashed lines). CHEST 1975 68, 46-50DOI: (10.1378/chest.68.1.46) Copyright © 1975 The American College of Chest Physicians Terms and Conditions

Figure 4 The relationship between lung volume and static transpulmonary pressure in patients with normal chest films (•) but maximum recoil pressure less than 10 cm H2O and those with widespread (×) radiologic emphysema. Control subjects (▵); ×±SD. CHEST 1975 68, 46-50DOI: (10.1378/chest.68.1.46) Copyright © 1975 The American College of Chest Physicians Terms and Conditions