844, 855, 866, 877, 888 and 800. No advantage to 8YY vs. using toll-free number as the latter is broad enough to include domestic toll-free services in other countries which number things differently. K7L (talk) 04:21, 31 October 2013 (UTC)
From Wikipedia, the free encyclopedia. The arteriovenous oxygen difference, or a-vO2 diff, is the difference in the oxygen content of the blood between the arterial blood and the venous blood. It is an indication of how much oxygen is removed from the blood in capillaries as the blood circulates in the body.he usual unit for a-vO 2 diff is millilitres of oxygen per 100 millilitres of blood (mL/100 mL), however, particularly in medical uses, other units may be used, such as micro moles per millilitre (Î¼mol/mL).
Short-term Oxygen Therapy in the Acute Care Setting. The most common indication for oxygen therapy in the acute setting is arterial hypoxemia with a PaO2 of less than 60 mm Hg. Ventilation perfusion mismatch is the most common cause of arterial hypoxemia.