A COMPARATIVE STUDY OF AGENTS (PROPOFOL AND THIOPENTONE WITH LOCAL ANAESTHETIC SPRAY) FOR LARYNGEAL MASK AIRWAY INSERTION.

Dr. KANTHARAJA H E; Dr. SAFIYA I SHAIK

Volume : IV, Issue : II, February - 2015

A COMPARATIVE STUDY OF AGENTS (PROPOFOL AND THIOPENTONE WITH LOCAL ANAESTHETIC SPRAY) FOR LARYNGEAL MASK AIRWAY INSERTION.

Dr. Kantharaja H E, Dr. Safiya I Shaik

Abstract :

Background: To assess whether the application of lignocaine to the posterior oropharynx prior to the use of thiopentone would allow the insertion of an LMA as easy as following propofol. A prospective randomized double blind study was conducted on 80 patients of ASA1&2 between the age group of 18-60 yrs undergoing various elective minor surgical procedures under general anaesthesia. Patients were randomly divided into two groups of 40 each. In group B or thiopentone group, the patients were given 3 sprays of 10% lignocaine to the posterior oropharynx before preoxygenation and anaesthesia was induced with thiopentone 5mg/kg IV. In group A after preoxygenation anaesthesia was induced with propofol 2.5mg/kg IV. An appropriate size of LMA was introduced.The anaesthesiologist who performed the LMA insertion also graded the LMA insertion conditions using six variables i.e mouth opening, coughing, gagging, laryngospasm, limb movements & ease of insertion in a three point scale. The six variables, three point scores were then summed to give an overall insertion condition score. The haemodynamic parameters, namely pulse rate, BP, respiratory rate and SpO2 were monitored. There were no statistically significant differences regarding the insertion conditions for LMA insertion between the two groups. Fall in blood pressure (systolic & diastolic) and respiratory depression was significantly greater in the propofol group compared to thiopentone with local anaesthetic spray group.