A differential bronchomotor response to cooling and drying the upper airway

Respiration Physiology
L Yuan, B Nail

Abstract

The present study aimed to compare the reflex bronchoconstrictor effects of upper airway applications of dry airstreams with equivalent cooling produced by cold isotonic and hypertonic saline solutions in anaesthetized rabbits. A method of on-line, breath by breath analysis of lung mechanics was used. The changes in total lung resistance (RL) and dynamic lung compliance (Cdyn) produced by dry airstreams and by cold hypertonic saline were greater than those induced by cold isotonic saline. Warm isotonic saline and supersaturated airstreams were ineffective. These results implicate osmotic disturbances in the response to dry airstreams. The response to dry airflow was abolished by section of the superior laryngeal nerves, by vagotomy and by atropine, suggesting a central cholinergic reflex mechanism is involved. Phosphoramidon had no effect, indicating that tachykinins are unlikely to play a role in this particular reflex.

References

Jun 17, 2005·Developmental Psychobiology·Mark S BlumbergJessica E Middlemis-Brown
May 1, 1997·Journal of Applied Physiology·T E Pisarri, G G Giesbrecht

Citations

Oct 6, 1977·The New England Journal of Medicine·R H StraussJ J Jaeger
Mar 1, 1986·Respiration Physiology·Y JammesC Grimaud
Sep 1, 1987·The American Review of Respiratory Disease·A N FreedH A Menkes
May 1, 1986·The Journal of Allergy and Clinical Immunology·C M Smith, S D Anderson
Jan 1, 1985·Respiration Physiology·G Sant'AmbrogioJ T Fisher
Oct 1, 1983·Respiration Physiology·Y JammesS Delpierre
May 1, 1984·The Journal of Allergy and Clinical Immunology·S D Anderson
Jun 1, 1993·The American Review of Respiratory Disease·G J ArgyrosJ J Jaeger

Related Concepts

Expiratory Airflow
Structure of Superior Laryngeal Nerve
Normal saline
Lung
Airway Resistance
Muscle Hypertonia
Atropine
Glycopeptides
Breath
Atropinum, atropine

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