Tracheal Collapse
Tracheal collapse is a progressive condition where the cartilage rings of the trachea weaken and flatten, causing the airway to narrow during breathing. It primarily affects small and toy breed dogs. The condition can involve the cervical trachea, intrathoracic trachea, or mainstem bronchi. It is a common cause of chronic cough in small dogs.
Symptoms & Signs
- Characteristic 'goose honk' cough
- Cough worsened by excitement, exercise, or pressure on neck
- Exercise intolerance
- Respiratory distress
- Cyanosis in severe episodes
- Gagging after eating or drinking
Causes & Risk Factors
Deficiency in glycosaminoglycans and calcium in tracheal cartilage rings, leading to progressive weakening. Genetic predisposition in toy breeds. Contributing factors: obesity, respiratory irritants, chronic respiratory disease, and endotracheal intubation trauma.
Diagnosis
Fluoroscopy (dynamic imaging showing collapse during breathing). Radiographs may show narrowing (less sensitive). Bronchoscopy for grading severity (Grade I-IV). CT for comprehensive airway assessment.
Treatment
Medical: weight loss, cough suppressants (hydrocodone, butorphanol), bronchodilators, anti-inflammatory doses of corticosteroids, avoiding neck collars (use harness). Surgical: intraluminal stenting for severe cases unresponsive to medical management.
Prevention
Maintain ideal body weight. Use harness instead of collar. Avoid respiratory irritants (smoke, dust). Minimize excitement-induced coughing episodes. Humidity control.
Prognosis
Medical management controls symptoms in 70% of cases. Tracheal stenting provides good relief but carries risks (stent fracture, granulation tissue). Progressive disease in some dogs despite treatment.
Affected Breeds (3)
| Breed | Species | Size |
|---|---|---|
| Papillon | Dog | Toy |
| Pomeranian | Dog | Small |
| Yorkshire Terrier | Dog | Small |