Muhammad Waseem Rabbani, Syed Aftab Haider, Muhammad Aatir Fayyaz.
Comparing the Effect of LMA Insertion and ETT Intubation to Induce General Anaesthesia on IOP.
Pak J Med Health Sci Jan ;8(3):673-5.

Aim: To evaluate the intraocular pressure and haemodynamic changes subsequent to insertion of laryngeal mask airway and endotracheal tube. Methods:- After obtaining formal approval of the ethics committee of the institution and informed consent from the patients, the study was conducted on 60 adult ASA grade I and ll patients aged between 50 to 65 years, taken up for elective intraocular lens implantation surgery. Results: We used Isoflorane-Nitrous Oxide for general anesthesia in patients under going posterior chamber lens implantation and studied the effects of Laryngeal Mask Airway (LMA) and Endotracheal Tube (ETT) on intraocular pressure (IOP) and hemodynamic changes (heart rate, mean arterial blood pressure). Sixty patients were studied and divided into two groups of thirty and intraocular pressures (mmHg), heart rates, mean arterial blood pressure were measured before and after ETT intubation and LMA insertion while intraocular pressure, mean arterial blood pressure and heart rate were not significantly increased in the LMA inserted group, these measurements were increased significantly in the ETT inserted group (p<0.05-p<0.0001). Conclusion: According to these results, we noticed that the use of LMA is a preferable and safe technique for the patients when high intraocular pressure is not desired.

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