Stenotic nares are smaller nostril openings than normal. The smaller breathing lumens make for an increased respiratory effort. Small changes in airway size create vast changes in air flow—especially in small patients with small airways. Over time, the increased work of breathing causes the secondary components of the syndrome—eversion of the laryngeal saccules and laryngeal collapse.
The increased resistance to airway pressure creates more work for the patient to move air in and out of its lungs. This creates problems during exertion or when exposed to high temperatures when panting is needed to cool the body. These scenarios can create an obstructive airway crisis, hyperthermia, or both. As the disease progresses and secondary changes occur, a crisis can occur with minimal stress or exert
ion. Chronic hypoxia creates pulmonary vasoconstriction and eventually pulmonary hypertension.Most airway resistance comes from the nasal passages.
By surgically correcting the stenotic nares we greatly reduce the pressure of airflow. Stenotic nares are corrected with one of several resection techniques. At Honeydew Animal Clinic we use the wedge resection technique - this entails curing out a small wedge from each nostril and closing the defect with a few absorbable sutures. Your dog will be required to wear a buster collar for 10-14 days to prevent self-trauma to the surgical site.
If you would like to know if your dog/cat will benefit from this procedure you are welcome to visit us for a consultation.
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