Keywords: endotracheal intubtion, laryngeal injuries, tracheal injuries

Abstract: The authors studies the early lesions of laringotraqueal mucosa following intubation in 30 dogs who were intubate with high complacent canula during the period of 4 hours. After this period biopsies of vocal cord, arytenoids, cricoid and tracheal rings were performed. The most frequent histological findings were neutrophils and mononuclear inflammatory cell infiltration into the corion, vascular congestion and necrosis of the epithelial cells. Based in these findings the authors recommend the use of canula with balonest of high complacence and the endoscopic follow up pf the after extubation.