• M Zubair Ahmed and Akbar Vohra.
• Department of Anesthesia, Manchester Royal Infirmary, Manchester, UK. zubair@cwcom.net
• Can J Anaesth. 2002 Oct 1; 49 (8): 863-6.

PurposeThe laryngeal mask airway (LMA) is used in nasal surgery but there is some concern of tracheal or laryngeal contamination with blood and secretions. We have evaluated the ability of the LMA to prevent airway contamination until full emergence from anesthesia.MethodsTwo hundred adults, ASA I-III patients, undergoing nasal surgery under general anesthesia were included in a prospective observational study. A reinforced LMA, sizes 3-5, was used during surgery and removed with its cuff inflated, in recovery, when the patients awoke. The LMA was examined on its laryngeal aspect for contamination of blood and secretions and scored (0-3) independently by two observers according to soiling (score of 0 = no blood; score of 1 = staining on the cuff; score of 2 = staining on the inside of mask; score of 3 = blood in the tube).ResultsThe contamination scores were [n (%)]: 0 =174 (87%); 1 = 22 (11%); 2 = 4 (2%); 3 = 0 (0%).ConclusionNinety-eight percent of patients had no or minimal contamination of the LMA. The 2% incidence of grade 2 LMA soiling is low and probably acceptable, since it did not result in symptoms of airway contamination. We suggest that the use of the LMA for nasal surgery may be appropriate.

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