| Cold Air Inhalation, Esophageal Temperature and Lung Function in Exercising Humans. |
14 MAR 1979 |
24 pages |
| Authors:
J. J. Jaeger; E. Chandler Deal Jr.; D. E. Roberts; E. R. McFadden Jr; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
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 | Eight normal individuals performed 10 min of bicycle exercise at 80% of their predicted maximum workload while breathing air at 22 C, saturated with water vapor and air at -40 C, dry. Rectal temperature and temperature at various locations along the length of the esophagus were measured during the exercise period. Pulmonary mechanics were measured before and 5 to 10 min after exercise. Temperature in the lower third of the ... |
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| Observations on Esophageal Temperature during Exercise in Asthmatic and Non-Asthmatic Subjects, |
08 AUG 1978 |
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| Authors:
E. Chandler Deal Jr.; E. R. McFadden Jr.; R. H. Ingram Jr.; James J. Jaeger; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
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 | We measured upper esophageal temperature during exercise and the subsequent pulmonary functional responses in eight asthmatic subjects and in six normal subjects who breathed air at cold and dry, ambient and body conditions. Asthmatic subjects developed the greatest obstruction following exercise with cold and dry air and no response to air at body conditions, while the normal subjects developed no obstruction in the post-exercise period with any of the three ... |
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| Hyperpnea and Heat Flux. The Initial Reaction Sequence in Exercise-Induced Asthma, |
05 JUN 1978 |
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| Authors:
E. Chandler Deal Jr.; E. R. McFadden Jr.; R. H. Ingram Jr.; James J. Jaeger; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
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| It was previously demonstrated that the magnitude of post exertional asthma is proportional to the heat exchange that occurs within the airways. Since the level of ventilation is an important determinant of the quantity of heat transferred from the mucosa, it was reasoned that if we simulated the hyperpnea of exercise by hyperventilation, heat exchange would be produced similar to that seen with exercise, and thus equivalent bronchial obstruction. To ... |
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| The Role of Respiratory Heat Exchange in the Production of Exercise-Induced Asthma, |
APR 1978 |
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| Authors:
E. Chandler Deal Jr.; E. R. McFadden Jr.; R. H. Ingram Jr.; Richard H. Strauss; James J. Jaeger; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
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| By having our subjects inhale dry air at various temperatures ranging from subzero to 80 C in a random fashion, we have tested the hypothesis that it is the total heat flux in the tracheobronchial tree during exercise that determines the degree of post-exertional obstruction that develops in asthma. Our purpose in this was to determine if heat could be transferred from the air to the mucosa so as to ... |
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| Effects of Atropine on the Potentiation of Exercise-Induced Bronchospasm by Cold Air, |
NOV 1977 |
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| Authors:
E. Chandler Deal Jr.; E. R. McFadden Jr.; R. H. Ingram Jr.; James J. Jaeger; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
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| The role of vagal afferent activity in the cold air potentiation of bronchial obstruction after exercise in asthma was assessed by exercising 9 asthmatic subjects who breathed air at ambient and sub-freezing temperatures both before and after cholinergic blockade. Lung volumes and maximal expiratory flow volume curves with air and with 80% helium - 20% oxygen were obtained before and 5 to 10 minutes after each exercise challenge. Isovolume comparisons ... |
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| Influence of Heat and Humidity on the Bronchospastic Response to Exercise in Asthma. |
AUG 1977 |
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| Authors:
Richard H. Strauss; E. R. McFadde Jr.; R. H. Ingram Jr.; E. Chandler Deal Jr.; James J. Jaeger; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
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| Results are reported of a study on the bronchospastic response of 8 asthmatics who exercised while breathing air under 4 conditions: (1) ambient room temperature and water content; (2) body temperature and ambient water content; (3) ambient room temperature fully saturated; and (4) body temperature fully saturated. These test conditions were performed in random order. Multiple aspects of pulmonary mechanics were measured before and 5 minutes after exercise. When air ... |
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