Laryngeal Intubation Analysis

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INTRODUCTION Orotracheal intubation is the commonest method to secure the airway during general anaesthesia. Direct laryngoscopy is used to facilitate orotracheal intubation and requires alignment of the oral, pharyngeal and laryngeal axes to achieve a straight line of sight for visualization of larynx.1 Video laryngoscopes have been introduced into clinical practice over last decade with the purpose of improving laryngeal visualization to facilitate intubation. Video laryngoscopes have a video chip embedded in the tip of the blade, which transmits magnified images to a display screen where they can then be viewed or recorded. Alignment of the oral, pharyngeal and laryngeal axes for a line-of-sight is not essential.2 This enables the operator…show more content…
An intubation difficulty score (IDS) of greater than 2 was not observed in any patient. Group-T had significantly lower mean IDS compared to group-M, thus suggesting easier intubation with the Truview evo2 laryngoscope. On analysis of our results we found that this difference in IDS between the two groups was attributed to mainly two parameters out of the total seven i.e. N4 and N5 which are CL grade and lifting force respectively. Better glottic exposure was observed and lesser lifting force was required during laryngoscopy and intubation with the Truview evo2 laryngoscope than the Macintosh laryngoscope. The unique optical system of Truview evo2 blade with a 460 refraction angle could have contributed to the lesser lifting force required during laryngoscopy, as it provides an “indirect view” of larynx without requiring the alignment of oral, pharyngeal and laryngeal…show more content…
Firstly, the longer learning curve for using Truview evo2 laryngoscope would have added to the mean time to intubation using this device. Although the laryngoscopist had performed 20 intubations using Truview evo2 before the start of the study and 10 pilot cases were also conducted, but the overall experience with Macintosh laryngoscope was much more. Hence it is possible that performing larger number of pilot cases or including a larger sample size would give better results. Secondly, the study included patients with a normal airway, so results cannot be extrapolated to patients with a difficult airway, for which further studies are required. Thirdly, the study was not blinded as blinding the laryngoscopist was not practically

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