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Created page with "right|thumb|100px|<small><center>Collapsed trachea (Image sourced from Bristol Biomed Image Archive with permission)</center></small> [[Image:Trac..."
[[Image:Collapsed trachea.jpg|right|thumb|100px|<small><center>Collapsed trachea (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
[[Image:Tracheal collapse.jpg|right|thumb|100px|<small><center>Tracheal collapse (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
*Occurs principally in
**Horses - small ponies
**Dogs - miniature and toy breeds eg: miniature Yorkshire terriers
**Also cattle and goats
*Degeneration of tracheal ring cartilage and replacement with fibrous tissue results in reduced tracheal ring stiffness
*Flattening of the trachea dorsoventrally and widening of the dorsal membrane results in reduced airway diameter
*Airway diameter is further reduced by thickening of the dorsal membrane
*The dorsal membrane can become thickened with repeated low grade trauma/[[Trachea Inflammatory - Pathology|chronic tracheitis]]
*Can be segmental and extrathoracic or intrathoracic
*Extrathoracic collapse:
**Inspiratory dyspnoea
**Dorsal membrane prolapses into the lumen on inspiration, bulges out on expiration
*Intrathoracic collapse
**Expiratory dyspnoea
**Dorsal membrane prolapses into the lumen on expiration, bulges out on inspiration
**Some dogs exhibit a characteristic "goose-honk" cough
==Test yourself with the Trachea Pathology Flashcards==
[[Trachea_Flashcards_-_Pathology|Trachea Pathology Flashcards]]
[[Category:Trachea - Pathology]]
[[Category:Respiratory System - Developmental Pathology]]
[[Image:Tracheal collapse.jpg|right|thumb|100px|<small><center>Tracheal collapse (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
*Occurs principally in
**Horses - small ponies
**Dogs - miniature and toy breeds eg: miniature Yorkshire terriers
**Also cattle and goats
*Degeneration of tracheal ring cartilage and replacement with fibrous tissue results in reduced tracheal ring stiffness
*Flattening of the trachea dorsoventrally and widening of the dorsal membrane results in reduced airway diameter
*Airway diameter is further reduced by thickening of the dorsal membrane
*The dorsal membrane can become thickened with repeated low grade trauma/[[Trachea Inflammatory - Pathology|chronic tracheitis]]
*Can be segmental and extrathoracic or intrathoracic
*Extrathoracic collapse:
**Inspiratory dyspnoea
**Dorsal membrane prolapses into the lumen on inspiration, bulges out on expiration
*Intrathoracic collapse
**Expiratory dyspnoea
**Dorsal membrane prolapses into the lumen on expiration, bulges out on inspiration
**Some dogs exhibit a characteristic "goose-honk" cough
==Test yourself with the Trachea Pathology Flashcards==
[[Trachea_Flashcards_-_Pathology|Trachea Pathology Flashcards]]
[[Category:Trachea - Pathology]]
[[Category:Respiratory System - Developmental Pathology]]