Haemodynamic Responses to Insertion of Proseal Laryngeal Mask Airway with Sodium Thiopentone Preceded by Topical Lignocaine: A Comparison with Propofol alone

Journal of Medical Sciences 2010;13(2):56-59 with 100% oxygen. Induction of anaesthesia was done with one of the two techniques mentioned above. Appropriate sized Proseal LMA was inserted by one of the anaesthesiolgist who did not know the type of induction technique employed. Blood pressure, pulse rate, oxygen saturation and ECG were recorded at 30 seconds after induction, 1 and 3 minutes after Proseal LMA insertion. Number of attempts required for successful insertion of pLMA was recorded. Apnoea time was also recorded. Apnoea time is the time interval during which the patient stops breathing and is measured from start of apnoea to start of spontaneous respiration. During this period patient's lungs were not manually ventilated. They received neither volatile anaesthetic agents nor nitrous oxide. Once the patient starts spontaneous respiration, non-depolarizing muscle relaxant was given and anaesthesia was maintained by oxygen and nitrous oxide (50% : 50%) with vapours of isoflourane. After completion of surgery, neuromuscular block was reversed. Postoperative complications including sore throat were recorded. Statistical analysis was done using student's't' test, Manyt-Whitney test, chi square and odds ratio.