Simplified Markov diagram of a patient admitted to the ward with no respiratory support. Simplified Markov diagram of a patient admitted to the ward with no respiratory support. A, An example of a patient admitted to the ward, no respiratory support branch with the available transitions for the Ward HFNC branch. B, An example of a patient admitted to the ward, no respiratory support branch with the available transitions for the ICU HFNC branch. Catherine Collins et al. Hospital Pediatrics 2017;7:451-459 ©2017 by American Academy of Pediatrics