Dynamic collapse of the upper respiratory tract: A review

Date

2008

Authors

Franklin, S.

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Journal article

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Equine Veterinary Education, 2008; 20(4):212-224

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S. H. Franklin

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Abstract

Dynamic collapse of the upper respiratory tract is a common cause of poor performance in athletic horses. Most commonly, airway obstruction occurs during strenuous exercise when the upper respiratory tract is exposed to high pressure swings. In horses undertaking submaximal exercise, the pressures may also be increased due to flexion of the neck. The nasopharynx and larynx are particularly prone to dynamic collapse and a number of different forms of upper airway obstruction are now recognised. However, due to the dynamic nature of the collapse a definitive diagnosis is often not possible from resting observations alone.

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