MCQ – 66635

Correct Answer � C Explanation

Ans:C.III

Grading of Laryngeal View

• The Cormack-Lehane system classifies views obtained by direct laryngoscopy based on the structures seen.
• It was initially described in 1984 as a way of simulating potential scenarios that trainee anesthetists might face.
• Grade    Description                       
• 1             Full view of glottis
• 2             Partial view of glottis     
• 3             Only epiglottis seen, none of the glottis seen              
• 4             Neither glottis nor epiglottis is seen

The new classification subdivides grade 2 and 3.

• Grade 2a: Posterior Cords Visible
• Grade 2b: Only Arytenoids visible
• Grade 3a: Epiglottis visible and liftable
• Grade 3b: Epiglottis adherent to the pharynx.
  • The view is easy(Grade 1 and 2a): suitable for intubation under direct vision.
  • The view is restricted (Grade 2b and 3a): likely to benefit from indirect methods (e.g. gum elastic bougie).
  • A difficult view (Grade 3a and 4): likely to need specialist methods for intubation which may need to be performed blindly.