When a client is receiving vasoactive therapy IV, such as dopamine (Intropin), and extravasation occurs,...

(A) Phentolamine is given to counteract the-adrenergic effects that cause ischemia and necrosis of local tissue. (B) Epinephrine is an endogenous catecholamine that produces vasoconstriction and increases heart rate and contractility. (C) Phenylephrine causes constriction of arterioles of skin, mucous membranes, and viscera, which in turn can cause ischemia and necrosis. (D) Sodium bicarbonate is an alkalinizing agent that is incompatible with dopamine.