In the same canine nasal disease case, which side showed decreased airflow on exam?

• A. Left Nostril
• B. Right Nostril
• C. Bilateral
• D. None

Answer: (A)

Decreased airflow on exam points to obstruction on that side of the nasal cavity. In this canine nasal disease case, the left side was blocked, so the left nostril showed reduced airflow. This pattern—unilateral obstruction with one side having less airflow—is typical when a lesion such as swelling, discharge, or a mass constricts that side. The other options don’t fit because a right-side blockage would show decreased airflow on the right; bilateral obstruction would affect both nostrils; and no decrease would imply normal airflow on both sides.