Arterial oxygen saturation normal value

Respiratory alkalosis is associated with low partial pressure of02 (25 to 35 mm Hg) and alkaline pH, but normal bicarbonate. The first two values are measured by arterial blood gas, which also yields partial pressure of carbon dioxide and arterial oxygen saturation. Circulating arterial oxygen saturation can also be measured by an oximeter, which is a noninvasive method that is fairly accurate and useful at the patient s bedside. 

Peak expiratory flow (PEF) and FEVj are less than 50% of normal predicted values. Pulse oximetry reveals decreased arterial oxygen and 02 saturations. The best predictor of outcome is early response to treatment as measured by improvement in FEVj at 30 minutes after inhaled /12-agonists. 

PEF and/or FEVi less than 50% of normal predicted values. Decreased arterial oxygen (Pao2), and O2 saturations by pulse oximetry (Sao2 less than 90% on room air is moderate to severe). Decreased arterial or capillary CO2 if mild, but in the normal range or increased in moderate to severe obstruction. 

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