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.
Acute pulmonary edema with mention of heart disease or failure is assigned code 428.1, per. ICD-9-CM, volume 2, Tabular List (see excludes note under code 518.4). Adult respiratory distress syndrome (ARDS) Acute pulmonary edema associated with ARDS is noncardiogenic.