Comparison of the performance between channelled and unchannelled blades of king visionâ„¢ videolaryngoscope in simulated rapid sequence induction of anaesthesia- a randomized controlled trial

Rapid sequence induction (RSI) is an anaesthetic technique indicated in  patients who have an increased risk of gastric regurgitation and aspiration.The objective of this technique is to minimize the most critical period i.e. when aspiration of gastric content may occur.

Videolaryngoscopy offers better glottic view as it does not require alignment of three axes i.e. oral, laryngeal and pharyngeal into one plane.On literature search, we observed that various VLs like CMAC, PENTAX, CVS, Airtraq and Channelled King Vision have been evaluated for facilitating intubation in RSI We hypothesize a higher performance of channelled VL when compared to unchannelled VL in terms of decreased time to intubation and better glottic view in RSI.On Literature search, we could not retrieve any study evaluating and comparing of the performance between channelled and unchannelled blades of King Vision videolaryngoscope in simulated rapid sequence induction of anaesthesia in patients scheduled for elective surgeries in Surgery and Gynaecology Operation theatre. Patients of either sex, aged 18-65yr, ASA grade I/II, with Modified Mallampati grade I/II, mouth opening >3cm, BMI<30 kg/m2 scheduled for elective surgeries under general anaesthesia and Exclusion criteria are Obstetric patients,Anticipated difficult airway [e.g. unanticipated difficult airway in the medical history (e.g.,Cormack and Lehane (C&L) ≥ III) or Airway Difficulty Score >8. Patient will be allocated into one of the two groups. Patients in group CB  will undergo laryngoscopy using channelled blade of King Vision VL. Patients in Group UB  will undergo laryngoscopy using unchannelled blade of King Vision VL. The primary outcome is to compare the Time taken for intubation between the two groups

Secondary outcomes are Cormack-Lehane grade of laryngeal view,POGO Score (percentage of glottic opening),No. of intubation attempts,Hemodynamic parameters i.e. HR,SBP,DBP and MAP during laryngoscopy,Intubation difficulty score,Ease of Intubation,Complications i.e.desaturation,laryngospasm etc.