Treatment of tracheal and endobronchial lesions with the potassium titanyl phosphate laser.

Lower tracheal and endobronchial lesions represent a difficult management problem. While there has been some success in the treatment of these lesions with the carbon dioxide laser, the limitations of its delivery system have restricted its use in infants and neonates. The potassium titanyl phosphate (KTP) laser, transmitted via a flexible quartz fiber, can be precisely manipulated even through rigid pediatric bronchoscopes as small as 3.0 mm. In addition, the Hopkins telescopic lens may be used to improve visualization and control. We report our experience using the KTP laser to treat 15 pediatric patients with tracheal and endobronchial lesions. The nature of the lesions, the details of the technique, and the results are presented.