10. Topical and Intravenous Lignocaine Comparison on Laryngeal Mask Airway Insertion Conditions Quality
Muhammad Shazad1 and Syed Muhammad Nadeem2
ABSTRACT
Objective: To compare the insertion conditions of laryngeal mask airway using topical and intravenous lignocaine as premedication to propofol induction.
Study Design: Randomised control trial study.
Place and Duration of Study: This study was conducted at the Department of Anaesthesiology , ICU and Pain medicine Liaquat National Hospital, Karachi during July 2009 and August 2010.
Materials and Methods: This study included one hundred and fourteen ASA I and II,elective day care surgical patients in our hospital between July 2009 and August 2010. Patients were randomized into group I (intravenous lignocaine) and group T (topical lignocaine) .Laryngeal mask airway was inserted after inducing general anaesthesia with propofol . After one minute consultant anaesthetist inserted appropriate size deflated LMA. Conditions for LMA insertion i.e. gagging, coughing or laryngospasm was recorded. Acceptable conditions if no gagging, coughing or laryngospasm resulting in successful first pass placement and ventilation recorded.
Results: Fifty seven patients were randomly assigned to two groups, group I (intravenous lignocaine) and group T (topical lignocaine) .The mean age in group I was 30+/- 9 years and in group T it was 31+/- 10 years. There were
12 males in group I and 16 males in group T while 45 females in group I and 41 females in group T. Gagging was noted in 9 patients (16%) in I group while only 2 patients (3.5%) in T group was statistically significant (P<0.026) . Coughing and laryngospasm was more in group I in comparison to group T. In group I , acceptable insertion conditions was 89% while in group T 98%. Unacceptable insertion conditions were 11% in group I while only 1.8% in group T.(p = 0.05)
Conclusion: Topical lignocaine application to the posterior pharynx for laryngeal mask airway insertion improves the acceptable insertion conditionsin comparison to intravenous lignocaine without using any intravenous muscle relaxation agent.
Key Words: LMA, gagging, coughing, laryngospasm
Citation of article: Shazad M, Nadeem SM. Topical and Intravenous Lignocaine Comparison on Laryngeal Mask Airway Insertion Conditions Quality. Med Forum 2020;31(4):40-44.