A Spanish study compares OR vs ICU intubation by direct laryngoscopy. Everything was somewhat worse in the ICU: worse view, lower first attempt success, higher rate of difficult intubation and use of airway adjuncts, and higher complication rate. They suggest that patient and environmental factors may be of more importance than the operator (even previously known easy intubations were more difficult in ICU). Despite all that, their success rate was better than other studies, which they attribute to high use of neuromuscular blocking agents, an increasingly recommended practice. Videolaryngoscopy has met with better success in many but not all studies.
At the least, greater preparation, optimized positioning and airway equipment, and trained assistance should be available for non-OR intubation