Effect Of LMA-Classic And LMA-Proseal Insertion On Intraocular Pressure In Adult Patients.

Background: One of the primary aims of anaesthetic management during ophthalmic surgery is to provide optimal control of intraocular pressure (IOP). Laryngeal mask airway (LMA)-classic and LMA-ProSeal have been compared on many aspects but we could not locate any trials comparing the effect of their insertion on IOP. Present study compared effect of LMA-classic and LMA-ProSeal insertion on the IOP. Methods: 100 patients requiring general anaesthesia for elective surgical procedures were divided into two groups (LMA-classic in 50 patients and LMA-ProSeal in 50 patients). Baseline IOP was recorded and after induction, LMA insertion was performed. Anaesthesia was maintained with nitrous oxide and halothane in oxygen. IOP was measured just before LMA insertion, just after LMA insertion and thereafter at intervals of 1, 3 and 5 minutes. Results: IOP decreased in both groups after induction with propofol (p value> 0.05). It rose just after the insertion of airway device in both the groups (p value>0.05). At one minute after the device insertion IOP started decreasing (p value>0.05). At 3 minutes and 5 minutes after the insertion of airway device the IOP was still decreasing in both the groups and was not significantly different. Conclusion: Results of the present study show that IOP always remains below baseline with the use of LMA-classic as well as LMA-ProSeal. The study showed similar profile of two devices as far as IOP is concerned.