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Vetdle Archive

Archive Case #151: Canine Brachycephalic Obstructive Airway Syndrome

Dog veterinary case - Easy - August 1, 2026

Clinical Clues

  1. Summer triage brings in a young flat-faced dog with loud breathing, limited exercise tolerance, and escalating heat stress.
  2. Even while fully awake, the dog's breathing has a prominent snoring quality.
  3. The dog becomes cyanotic after excitement on warm days.
  4. Examination reveals stenotic nares and marked upper airway noise.
  5. Sedated airway assessment identifies elongation of the soft palate.
  6. Conformational upper airway obstruction in short-muzzled breeds is commonly grouped as BOAS.

Diagnosis

Canine Brachycephalic Obstructive Airway Syndrome

This case is most consistent with Canine Brachycephalic Obstructive Airway Syndrome because the dog has upper airway obstruction linked to classic breed conformation. The most important clues are the stenotic nares and elongated soft palate, which make lower airway disease less likely.

Learning review

Review the case evidence

Use the paired clues to explain how the evidence in this dog case supports the provided diagnosis, Canine Brachycephalic Obstructive Airway Syndrome, then compare your reasoning with the case explanation.

Evidence checkpoints

Clues 1-2

  1. Clue 1: Summer triage brings in a young flat-faced dog with loud breathing, limited exercise tolerance, and escalating heat stress.
  2. Clue 2: Even while fully awake, the dog's breathing has a prominent snoring quality.

Clues 3-4

  1. Clue 3: The dog becomes cyanotic after excitement on warm days.
  2. Clue 4: Examination reveals stenotic nares and marked upper airway noise.

Clues 5-6

  1. Clue 5: Sedated airway assessment identifies elongation of the soft palate.
  2. Clue 6: Conformational upper airway obstruction in short-muzzled breeds is commonly grouped as BOAS.

Self-review prompts

  1. After clues 1-2, what evidence from this dog case shaped your initial interpretation?
  2. When you compare clues 3-4 with clues 1-2, what changed in your reasoning about Canine Brachycephalic Obstructive Airway Syndrome?
  3. How do clues 5-6 align with the case explanation for Canine Brachycephalic Obstructive Airway Syndrome?

Educational Use

Vetdle archive cases are educational veterinary games for diagnostic reasoning practice. They do not provide veterinary advice, diagnosis, treatment, or professional medical guidance.