1. Volume 100, Issue 2, Pages 317-321 (August 1991)
Treatment of Bronchial Asthma with Terbutaline Inhaled by Conespacer Combined with Positive Expiratory Pressure Mask 
Erika Frischknecht-Christensen, M.D., Ole Nørregaard, M.D., Ronald Dahl, M.D. 
CHEST 
Volume 100, Issue 2, Pages (August 1991)
DOI: /chest
Copyright © 1991 The American College of Chest Physicians Terms and Conditions

2. FIGURE 1
Combined Nebuhaler-PEP-mask, which is constructed from a 750-ml volume conespacer (Nebuhaler) connected to a facemask with a T-tube for separation of inspiratory and expiratory airflow by a valve. Variable resistances can be applied onto the expiratory tube as connections of different diameters. A positive airway pressure will in this way be present only during expiration.
CHEST  , DOI: ( /chest )
Copyright © 1991 The American College of Chest Physicians Terms and Conditions

3. FIGURE 2
PEF before and after inhalation during the treatment periods (mean and SEM).
CHEST  , DOI: ( /chest )
Copyright © 1991 The American College of Chest Physicians Terms and Conditions

4. FIGURE 3
PEF before and after inhalation during the day (mean and 95% confidence intervals).
CHEST  , DOI: ( /chest )
Copyright © 1991 The American College of Chest Physicians Terms and Conditions