The nurse is evaluating a patient's diagnosis of arterial insufficiency with reference to the adequacy of the patient's blood flow. On what physiological variables does adequate blood flow depend? Select all that apply
A) Efficiency of heart as a pump
B) Adequacy of circulating blood volume
C) Ratio of platelets to red blood cells
D) Size of red blood cells
E) Patency and responsiveness of the blood vessels
Ans: A, B, E
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Adequate blood flow depends on the efficiency of the heart as a pump, the patency and responsiveness of the blood vessels, and the adequacy of circulating blood volume. Adequacy of blood flow does not primarily depend on the size of red cells or their ratio to the number of platelets.
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