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.
Causes of acute respiratory failure. A number of conditions may cause acute respiratory failure, many of which are life-threatening or serious conditions. Causes of chronic respiratory failure. A number of conditions may cause chronic respiratory failure, many of which are serious conditions.