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.
Code G81.91 is assigned with code I66.9 for cerebral thrombosis with transient right hemiplegia that has cleared by the time the patient is discharged. t When a patient is admitted with respiratory failure and another acute condition (such as AMI or CVA) the principal diagnosis is always respiratory failure.