Peter

Most means more than half. So for POGO it’s anything >50% It’s a common misconception that grade 1 means ‘full view of the cords’ The C&L grading is more often incorrectly quoted then correctly quoted in papers The original Cormack and Lehane paper had multiple issues. pubmed.ncbi.nlm.nih.gov/6507827/ One is that thee are no data and wildly inaccurate (overoptimistic) estimates of how infrequent Grade 3 & 4 views are. Estimate grade 3 1:2000 and grade 4 <1:100,000. These are fanciful: grade 3 is 5.8% The second is that the images of grades don’t match the text description. This includes that in the Grade 3 image posterior laryngeal structures are clearly visible The third and final problem with the C&L paper is that the grades don’t correlate with increasing difficulty with intubation. Difficulty increases -mid grade 2 (need a bougie) -in grade 3 if you can’t lift the epiglottis (need to do something fancy) This is resolved by the practical grading published in 2000 by some whippersnapper upstart …-publications.onlinelibrary.wiley.com/doi/full/10.10… In summary The paper has no data The estimates of incidence are wildly inaccurate The scale is imprecisely described The scale is very poorly remembered and quoted The scale is of very limited practical value Apart from that it’s great… @Anaes_Journal @dasairway