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.
Definition. 1  Adult respiratory distress syndrome (ARDS), also called acute respiratory distress syndrome, is a type of lung (pulmonary) failure that may result from any disease that causes large amounts of fluid to collect in the lungs.