Volume 104, Issue 4, Pages (October 1993)

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Volume 104, Issue 4, Pages 1108-1113 (October 1993) Inhaled β2-Agonist and Positive Expiratory Pressure in Bronchial Asthma Erika Frischknecht Christensen, M.D., Ole Norregaard, M.D., Lone Winther Jensen, M.D., Ronald Dahl, M.D. CHEST Volume 104, Issue 4, Pages 1108-1113 (October 1993) DOI: 10.1378/chest.104.4.1108 Copyright © 1993 The American College of Chest Physicians Terms and Conditions

FIGURE 1 Cone spacer (Nebuhaler) PEP mask. Variable resistances can be applied onto the expiratory tube as connections of different diameters, giving positive expiratory pressure (PEP). CHEST 1993 104, 1108-1113DOI: (10.1378/chest.104.4.1108) Copyright © 1993 The American College of Chest Physicians Terms and Conditions

FIGURE 2 Difference in expiratory airway resistance, ΔRAW = Raw after-Raw before each dose, and difference in functional residual capacity; ΔFRC = FRC after-FRC before each dose; p = placebo. Mean and 95 percent confidence interval. Values for five patients on a day with repetitive placebo doses. CHEST 1993 104, 1108-1113DOI: (10.1378/chest.104.4.1108) Copyright © 1993 The American College of Chest Physicians Terms and Conditions

FIGURE 3 Difference in expiratory airway resistance ΔRAW = Raw after-Raw before each dose; p = placebo. Mean and 95 percent confidence interval. CHEST 1993 104, 1108-1113DOI: (10.1378/chest.104.4.1108) Copyright © 1993 The American College of Chest Physicians Terms and Conditions

FIGURE 4 Difference in functional residual capacity, ΔFRC = FRC after-FRC before each dose; p = placebo. Mean and 95 percent confidence interval. CHEST 1993 104, 1108-1113DOI: (10.1378/chest.104.4.1108) Copyright © 1993 The American College of Chest Physicians Terms and Conditions