Which is a true statement about blood pressure (BP) measurement?

a. BP can be obtained by direct or indirect methods.
b. BP can be taken on an arm that has an IV.
c. Pressure is higher during diastole and lower in systole.
d. BP readings measure tissue perfusion.

ANS: A
Blood pressure measures the contraction and relaxation of the heart. Blood pressure is higher in systole than in diastole and is measured in millimeters of mercury; the arm used for measurements should be opposite the one used for IV fluid therapy. Measurement can be direct or indirect, and can be continuous or intermittent.