In the context of cuff selection for obese patients, what is essential?

• A. Use a standard cuff and measure quickly
• B. Place cuff over clothing
• C. Use a large or extra-large cuff and ensure the bladder covers the arm as recommended
• D. Refrain from taking BP in obese patients

Answer: (C)

The key idea is using a cuff that actually fits the arm. In obese patients, an arm is larger, so a standard cuff often isn’t wide enough or long enough to encircle enough of the arm. When the bladder doesn’t cover a sufficient portion of the arm, the measurement becomes distorted, usually giving an inaccurately high reading. Using a large or extra-large cuff and making sure the bladder covers the arm as recommended (roughly 80% of the arm’s circumference, with adequate width) improves accuracy and reliability of the blood pressure reading.

Placing the cuff over clothing or using a cuff that doesn’t fit compromises the measurement, and avoiding BP is not appropriate—the right approach is to ensure proper cuff size and placement.