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.
Chronic, or long-term, respiratory failure is commonly caused by chronic obstructive pulmonary disease (COPD), neuromuscular disease, or even morbid obesity. The signs and symptoms of respiratory failure differ depending on the severity and underlying cause. Acute respiratory failure occurs rapidly and can resolve with treatment. Chronic respiratory failure, on the other hand, is a progressive disease, which typically worsens over time. Symptoms of respiratory failure include difficulty breathing, cyanosis (blue or purple coloration of the skin), and lethargy. Treatment depends on the severity of the disease and may include oxygen support, bronchodilators, and ventilatory support.