CO2 Laser Repair of Subglottic and Upper Tracheal Stenosis

Abstract
Seven large adult canines were studied. Microendoscopic forceps and electrocautery excisions of subglottic and upper tracheal mucosa, perichondrium and cartilage resulted in stenoses in all animals. Four partial lesions were created in the upper trachea, and 3 complete stenoses occurred in the subglottic region. Five of the animals required permanent tracheostomy. Three months later 6 animals had excisions with the CO2 laser, and 1 animal with upper tracheal stenosis was a control. After 3 mo. follow-up, 2 of the canines with upper tracheal stenosis showed a slightly improved airway and one remained the same as preexcision. All 3 animals with subglottic lesions redeveloped complete stenosis.

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