Which position is the cuff placed in relation to heart when measuring BP?

• A. The cuff should be placed on the bare upper arm at heart level.
• B. The cuff should be placed on the upper arm with the arm raised above head.
• C. The cuff should be placed on the leg.
• D. The cuff should be placed on the forearm.

Answer: (B)

For an accurate reading, the cuff belongs on the bare upper arm with that arm held at heart level. This position makes the pressure inside the arm reflect the true arterial pressure at the level of the heart, minimizing the effect of gravity (hydrostatic pressure). If the arm is raised above the heart, the reading tends to be too low; if the arm is below heart level, it tends to be too high. Placing the cuff on the leg or forearm introduces different cuff sizes and arterial dynamics and tends to yield unreliable results. Keep the arm relaxed, supported at the level of the heart, with the cuff snug on the bare upper arm.