Alveolar gas-arterial oxygen pressure difference

The alveolar-arterial oxygen partial pressure difference refers to a difference between the alveolar oxygen partial pressure and the arterial blood oxygen partial pressure. In cardiopulmonary resuscitation, the alveolar-arterial oxygen partial pressure difference is an important indicator of prognosis. Arterial blood was drawn and measured with a blood gas analyzer. Used to judge the ventilation function of the lung, it can reflect the oxygen uptake of the lung more sensitively than Pa O2. Helps understand the progression of lung disease. It can be used as an indication of mechanical ventilation or a reference indicator for withdrawal.

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