1 Prophylaxis against dexamethasone associated ulceration: 0.031-1.25 mg/kg/hr during dexamethasone therapy to maintain gastric pH >4.  Prophylaxis against stress ulceration: 2 mg/kg q12hr or 1.5 mg/kg IV q8hr; alternativley, 2 mg/kg over 10 min, followed by continuous infusion of 0.083 mg/kg/hr.
The heart is a muscular pump that pushes blood through blood vessels around the body. Essential to life, the heart beats continuously, pumping the equivalent of more than 14,000 litres of blood every day. Blood vessels form the living system of tubes that carry blood both to and from the heart.
Blood vessels also play a role in controlling your blood pressure. Blood vessels are found throughout the body. There are five main types of blood vessels: arteries, arterioles, capillaries, venules and veins. Arteries carry blood away from the heart to other organs.roups of capillaries within a tissue reunite to form small veins called venules. Venules collect blood from capillaries and drain into veins. Veins are the blood vessels that carry blood back to the heart.