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.
This topic covers acute respiratory distress in patients over the age of 12 years. Definition Acute impairment in gas exchange between the lungs and the blood causing hypoxia with or without hypercapnia (e.g., caused by acute decompensation of chronic pulmonary disease). Hypoxic respiratory failure (type 1 respiratory failure) is hypoxia without hypercapnia and with an arterial partial pressure of oxygen (PaO2) of <8 kPa (<60 mmHg) on room air at sea level. Hypercapnic respiratory failure (type 2 respiratory failure) is hypoxia with an arterial partial pressure of carbon dioxide (PaCO2) of >6.5 kPa (>50 mmHg) on room air at sea level.