• Po Agbamu, Id Menkiti, I Desalu, Ot Kushimo, and Fb Akinsola.
• J West Afr Coll Surg. 2013 Jan 1;3(1):53-71.

BackgroundSuxamethonium causes a rise in intraocular pressure (IOP). Its use for intraocular surgical procedures especially management of the penetrating eye injury is controversial because of the risk of extrusion of vitreous contents. This risk can be avoided by substituting it with rocuronium. The aim of this study was to compare the IOP changes and intubating conditions following the use of both muscle relaxants.Aim And ObjectivesTo compare the intraocular pressure changes and intubating conditions following the use of both suxamethonium and rocuronium.Design Of StudyProspective, randomized, double-blind study.Study SettingThe operating theatres of the Lagos University Teaching Hospital Patients and Methods: A prospective, randomized study in which 70 patients received suxamethonium 1.5mg/kg or rocuronium 0.9mg/kg after induction with thiopentone 5mg/kg. Laryngoscopy was performed after 60 seconds. Measurements of IOP were taken before induction, 1 minute after administration of either muscle relaxant and at 1, 3 and 5 minutes after intubation. Intubating conditions were evaluated using a simple scoring system.ResultsSuxamethonium caused a significant rise in intraocular pressure throughout the study period (p < 0.005), maximal 1 minute after intubation (p < 0.001). Rocuronium caused a significant fall in intraocular pressure 1 minute after administration (p < 0.001) and this remained less than the baseline value in the post intubation period. Intubating conditions in both groups were similar.ConclusionRocuronium is preferred as muscle relaxant for tracheal intubation when a rise in intraocular pressure is undesirable.

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