CO2, YAG-Nd and copper lasers were applied for elimination of persistent obstruction of the laryngopharynx, larynx and trachea in 331 patients aged 23 days to 15 years. Scar stenosis, vascular tumors, cysts, nonspecific granulemas were diagnosed in 271, 29, 8 and 23 patients, respectively. Current and newly-developed techniques reducing thermal damage to the adjacent to laser-exposed tissues and principles of laser treatment choice for different obstructions are analysed.
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