To the Editor:--Treatment of tracheal stenosis by means of the insertion of endotracheal prosthesis [1]through the endotracheal tube (ETT) is difficult. A patient with tracheal stenosis in whom laryngeal mask airway (LMA) was successfully used to place a metal-stent prosthesis is reported.

A 39-yr-old woman, height 156 cm, weight 56 kg, with idiopathic subglottic tracheal stenosis and vocal cords synechia underwent several surgical interventions with immediate but short-term clinical improvement. An expandable metal tracheal stent was inserted via an ETT (size 7.5, Mallinckrodt) and fluoroscopic monitoring under general anesthesia, but a computed tomographic scan revealed distal displacement 48 h after the insertion, producing increased respiratory symptoms. A second endoprosthesis was inserted, this time via an LMA (Figure 1). After preoxygenation, anesthesia was induced with propofol (2.5 mg/kg) and fentanyl (20 mg), and a size 4 LMA was inserted. Anesthesia was maintained with a mixture of 50% air/oxygen and an infusion of propofol (0.16–0.11 mg *symbol* kg sup -1 *symbol* min sup -1). The extent of the stenosis was evaluated using direct visualization through a flexible fiberoptic scope (Olympus LF-1, Tokyo, Japan) aided by fluoroscopic monitoring; radioopaque marks were drawn on the neck at the level of the superior and inferior borders of the stenosis. The leader catheter of the stent was introduced through the LMA and was directed to the stenosed area by direct visualization aligned with the radioopaque skin markers. Once in position, the stent was advanced to the stenotic area, and the leader was withdrawn. To facilitate the handling of the instruments, the aperture bars of the LMA were removed before its positioning.

Figure 1. Prosthesis and fiberoptic scope through laryngeal mask airway.

Figure 1. Prosthesis and fiberoptic scope through laryngeal mask airway.

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Juan C. Catala, M.D., Staff Anesthesiologist, Hospital General Universitario de Valencia, Universidad de Valencia.

Francisco Garcia Pedrajas, M.D., Anesthesiologist, Associate Professor of Anesthesiology.

Jose Carrera, M.D., Anesthesiologist, Associate Professor of Anesthesiology.

Pablo Monedero, M.D., Anesthesiologist, Associate Professor of Anesthesiology.

Francisco Carrascosa, M.D., Head, Department of Anesthesiology and Critical Care.

Jose L. Arroyo, M.D., Professor of Anesthesiology, Clinica Universitaria, School of Medicine, University of Navarra.

Rousseau H, Dahan M, Lauque D, Carre P, Didier A, Bilbao I, Herrero J, Blancjouvant F, Joffre F: Self-expandable prostheses in the tracheobronchial tree. Radiology 1993; 188:199-203.