Effectiveness of McCoy laryngoscopy and C-MAC D video laryngoscopy bladein managing predicted difficult airway under EEG entropy based anesthesia – A single blindrandomized control study

Endotracheal intubation is anintegral part of general anaesthesia for most of the patients undergoingsurgery. Difficulty in ventilation and failure to intubate are the principalcauses of hypoxemia, aspiration, ischemic brain injury, cardiovascularcomplications and possibly leading to death. Airway accessories have beendeveloped over theyears likedifferent types ofblades, airways, bougies, supraglottic devices, fibreopticlaryngoscopeand C-MAC video laryngoscope for better vision and securing the airway.

C-MAC(Concurrent MediaAccess Control) video laryngoscope (Karl Storz, Germany) is one of suchindirect laryngoscope meant for videoscope guided intubation. It is introducedin the oral cavity and the operator views the larynx on the video screen whichguides the intubation.

McCoy laryngoscopy is atraditional method in use .It has a hinged tip that aids in improving theCormack and Lehane laryngoscopic view by 1 grade by lifting up the epiglottis. C-MACis not available still in many centres in India.

There are limitedliteratures comparing the C-MAC and McCoy laryngoscope in predicted difficultairway, so we designed a randomised control study to compare the effectivenessof  McCoy and CMAC laryngoscopy   inpredicted difficult airway in elective surgeries under EEG entropy-basedanaesthesia. This entropy based anaesthesia will ensure uniform and adequatedepth of anaesthesia during and after intubation when we compare both methods.

In this study, we intend tocompare both techniques for difficult intubation, in terms of success rates.