title: Intra-ocular pressure changes following laryngeal mask airway insertion: a comparative study.
abstract: We compared the effects of the Brain laryngeal mask airway with a tracheal tube on intra-ocular pressure. Propofol was used as induction agent and atracurium as relaxant. Twenty-six patients with normal intra-ocular pressure undergoing cataract surgery were randomly allocated to two groups. Group A (n = 13) had a laryngeal mask airway inserted and Group B (n = 13) had a tracheal tube inserted. Intra-ocular pressure was measured just before insertion of the airway, 20 s after insertion and at 2 min. In the laryngeal mask airway group there were no significant changes in mean intra-ocular pressure. In the tracheal tube group there was a significant rise in mean intra-ocular pressure at 20 s (p = 0.0056) which returned to pre-insertion levels at 2 min. We conclude that the laryngeal mask airway continues to have advantages over the tracheal tube for ophthalmic surgery despite the use of propofol and atracurium as anaesthetic agents.
authors.affiliation: Department of Anaesthesia and Ophthalmology, Mater Misericordiae Hospital, Dublin, Ireland.
authors.forename: A M
authors.initials: AM
authors.lastname: Whitford
authors.forename: S W
authors.initials: SW
authors.lastname: Hone
authors.forename: B
authors.initials: B
authors.lastname: O'Hare
authors.forename: J
authors.initials: J
authors.lastname: Magner
authors.forename: P
authors.initials: P
authors.lastname: Eustace
mesh_terms: D000368:Aged; D018686:Anesthetics, Intravenous; D001279:Atracurium; D002387:Cataract Extraction; D005260:Female; D006801:Humans; D007429:Intraocular Pressure; D007442:Intubation, Intratracheal; D017214:Laryngeal Masks; D008297:Male; D003473:Neuromuscular Nondepolarizing Agents; D015742:Propofol
chemical_list: D018686:Anesthetics, Intravenous; D003473:Neuromuscular Nondepolarizing Agents; D001279:Atracurium; D015742:Propofol