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).
arteriovenous oxygen difference. n. The difference in the oxygen content, in milliliters per 100 milliliters blood, between arterial and venous blood.rteriovenous oxygen difference. n. The difference in the oxygen content, in milliliters per 100 milliliters blood, between arterial and venous blood.