LMA® ProtectorTM Airway. First experience with a new second generation laryngeal mask.

BACKGROUND: The LMA ProtectorTM Airway (LMA-Protector) is a new supraglottic airway promising a better seal, an improved drainage of gastric secretions and the opportunity of a simplified fiberscopic guided tracheal intubation. The aim of this study was to present a primary evaluation of the LMA-Protector in a clinical setting.

METHODS: After informed consent 50 patients, scheduled for minor/moderate surgery in supine position, were recruited. Pharyngeal seal pressures were examined in neutral position of the patients ́ head and in maximum passive extension of the neck. Additionally the fiberscopic view on the glottis was graduated and the feasibility of fiberscope guided tracheal intubation through the device was evaluated.

RESULTS: The median pharyngeal seal pressure of the LMA-Protector in neutral position of the head was 34 cmH2O. Passive extension of the neck did not cause a reduction of the pharyngeal seal (median pharyngeal seal pressure: 34.7 cmH2O; p< 0.039). The LMA-Protector was applicable for fiberscopic tracheal intubation, but is not reliable for blind tracheal intubation.

CONCLUSIONS: The LMA-Protector provides a high pharyngeal seal. Uncommon for laryngeal masks its pharyngeal seal is not affected by the extension of the patient ́s neck. As a second generation supraglottic airway which is also suitable for simplified fiberscopic guided tracheal intubation, the LMA-Protector could be considered as a supraglottic airway of the third generation.