Brachycephalic Obstructive Airway Syndrome: Grading, Assessment, and Treatment

Area of Science:

• Veterinary Medicine
• Comparative Pathology
• Animal Physiology

Background:

• Brachycephalic obstructive airway syndrome (BOAS) in dogs is characterized by anatomic abnormalities.
• These abnormalities alter airway resistance and airflow dynamics, leading to secondary airway changes.

Purpose of the Study:

• To explain the link between anatomic abnormalities and clinical signs in brachycephalic dogs.
• To discuss methods for grading BOAS severity and stratifying patients for treatment.

Main Methods:

• Review of existing literature on brachycephalic airway disease.
• Analysis of how anatomic abnormalities influence airway resistance and airflow.
• Evaluation of diagnostic tools like exercise tolerance tests and respiratory auscultation.

Main Results:

• Anatomic abnormalities directly cause turbulent airflow and increased airway resistance.
• Secondary airway changes result from chronic alterations in airflow dynamics.
• Airway noises are a common clinical sign of these underlying changes.

Conclusions:

• Multiple anatomic sites contribute to BOAS and require a comprehensive approach.
• Disease severity can be graded using clinical assessments, guiding treatment strategies.
• Surgical intervention aims to correct specific anatomic abnormalities to alleviate clinical impairment.