What is type II respiratory failure? What is the principle of oxygen supply?

Respiratory failure is a series of clinical syndromes caused by various reasons, such as lung ventilation and/or ventilation dysfunction, which prevents effective gas exchange, leading to hypoxia, with or without carbon dioxide retention, and thus leading to a series of physiological functions and metabolic disorders.

This judgment is based on arterial blood gas analysis. Blood gas analysis shows that patients with oxygen partial pressure less than 60mmHg and carbon dioxide greater than 50mmHg are type II respiratory failure.

Type ⅱ respiratory failure: hypoxia with carbon dioxide retention (oxygen partial pressure less than 60mmHg, carbon dioxide partial pressure greater than 50mmHg). Oxygen should be supplied at low flow rate (1L/min-2L/min) and low concentration (30%) until the partial pressure of oxygen rises to 60mmHg. Type I respiratory failure has only hypoxia, no carbon dioxide retention, and can inhale higher concentration of oxygen, but generally it does not exceed 50%.

Extended data:

Type Ⅱ respiratory failure: caused by insufficient alveolar ventilation, with O2 and CO2 retention parallel to simple ventilation. If accompanied by impaired ventilation, hypoxia is more serious. Only by increasing alveolar ventilation and oxygen therapy when necessary can it be corrected.

In order to keep the respiratory tract unobstructed and ventilated effectively, drugs such as salbutamol, terbutaline sulfate, acetylcysteine and ambroxol hydrochloride can be given to relieve bronchospasm and expectoration. Adrenal cortical hormone can be injected intravenously if necessary.

Baidu Encyclopedia-Type Ⅱ Respiratory Failure