What are the guidelines for measuring blood pressure, including arm restrictions and patient positioning?

Do not measure on an arm with an IV, cast, dialysis access, injury, or on the side of breast surgery; if neither arm can be used, ask the nurse for an alternate site, such as the leg. Let the person rest for 10 to 20 minutes, then have them sit or lie down with the bare upper arm level with the heart and the palm up, unless the doctor orders a standing reading. For orthostatic vital signs, follow the center's policy and return the person to a supine position immediately if they feel dizzy or faint.

When measuring blood pressure, avoid an arm with an IV infusion, cast, or dialysis access site, and do not take it on the side where breast surgery was performed or on an injured arm. If neither arm is usable, ask the nurse for instructions on an alternate site, often the leg. Position the person sitting or lying down unless standing is specifically ordered, and keep the arm level with the heart, not bent, with the palm up. Apply the cuff to the bare upper arm, snugly, and use the correct cuff size because a loose cuff or wrong size can cause inaccurate readings. Allow the person to rest for 10 to 20 minutes before measuring. If orthostatic vital signs are ordered, follow center policy, usually measuring after 5 minutes supine, then sitting, then standing; if the person complains of dizziness or faintness, immediately place them supine and notify the nurse.