For example: char a; a= getchar(); The function getchar() reads a single character from the standard input device, the keyboard being assumed because that is the standard input device, and assigns it to the variable a.
This excludes acute and chronic respiratory failure (518.84), acute respiratory distress (518.82), acute respiratory failure following trauma and surgery (518.51), chronic respiratory failure (518.83), respiratory arrest (799.1), and respiratory failure, newborn (770.84). This applies to respiratory failure NOS.
Document whether the respiratory failure is acute, chronic, or acute decompensating on chronic condition. Document clinical signs and symptoms and any lab findings to support the diagnosis of acute respiratory failure when present. Document any treatments directed towards the respiratory failure in progress notes, i.e. intubation, conventional mechanical, ETT or trach, Bipap, hi-flow/Vapotherm, CPAP, NAVA, nebs, oxygen, etc.