Blood Pressure Measurement Guidelines

Optimal Cuff Dimensions

The American Heart Association recommends that the blood pressure cuff bladder should encircle 80-100% of the arm circumference, with a bladder width that is at least 40% (ideally 46%) of the arm circumference 1, 2
The bladder length should encircle 80-100% of the arm circumference, as specified by the American Heart Association 1, 2, 3, 4
For neonates, a width-to-arm circumference ratio of 0.45 to 0.55 is recommended by the American Academy of Pediatrics 3, 4, 5

The American Heart Association provides specific cuff size recommendations based on measured arm circumference, including a small adult cuff for arm circumferences of 22-26 cm 1, 2
For arm circumferences of 27-34 cm, a standard adult cuff (16 × 30 cm) is recommended by the American Heart Association 1
For arm circumferences of 35-44 cm, a large adult cuff (16 × 36 cm) is recommended by the American Heart Association 1
Arm circumference should be measured at the midpoint between the acromion and olecranon with the shoulder neutral and elbow flexed to 90°, as recommended by the American Academy of Pediatrics 3, 5

Undercuffing (using too small a cuff) accounts for 84% of cuff selection errors, according to the American Heart Association 1
Cuffs that are too small produce falsely elevated readings, as reported by the American Heart Association 1, 2
Cuffs that are too large produce falsely low readings, but the error magnitude is smaller than with undercuffing, as reported by the American Heart Association 1, 2

The American Heart Association recommends measuring the arm circumference at the midpoint between acromion and olecranon 5, 3
The American Heart Association table should be used to select cuff size based on arm circumference 1, 2
The cuff should be positioned 2-3 cm above the antecubital fossa with the bladder centered over the brachial artery, as recommended by the American Academy of Pediatrics 3, 4, 5

For pregnancy, some guidelines specify that cuff length should be 1.5 times arm circumference, as reported by the American College of Obstetricians and Gynecologists 6, 7