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.
If the kidney failure is severe, dialysis will be necessary to remove excess waste products. In addition, if the kidneys were badly damaged, a transplant may be necessary. Coding for Acute Renal Failure. Acute renal failure is classified to ICD-9-CM category 584.