Which statement about cuff width for blood pressure measurement is incorrect?

Which statement about cuff width for blood pressure measurement is incorrect?

• A. The cuff width should be approximately two-thirds of the arm circumference
• B. The cuff width should be about 40% of the arm circumference
• C. The cuff should be wrapped smoothly around the arm
• D. The cuff width should be large enough to cover the arm circumference

Answer: (A)

Choosing cuff width in proportion to the arm circumference is crucial for accurate blood pressure readings. If the cuff is too narrow, readings tend to be higher; if it’s too wide, readings can be lower. The standard aim is a cuff width about 40% of the mid-arm circumference, with the cuff able to encircle the arm smoothly and cover a sufficient portion of the circumference so pressure is applied evenly. The statement that cuff width should be approximately two-thirds of the arm circumference is not correct because that width is wider than recommended and can bias the measurement toward lower values. The other points align with proper technique: using a cuff about 40% of the arm circumference, wrapping it smoothly around the arm, and ensuring the cuff is wide enough to encircle and properly cover the arm.

Choosing cuff width in proportion to the arm circumference is crucial for accurate blood pressure readings. If the cuff is too narrow, readings tend to be higher; if it’s too wide, readings can be lower. The standard aim is a cuff width about 40% of the mid-arm circumference, with the cuff able to encircle the arm smoothly and cover a sufficient portion of the circumference so pressure is applied evenly.

The statement that cuff width should be approximately two-thirds of the arm circumference is not correct because that width is wider than recommended and can bias the measurement toward lower values. The other points align with proper technique: using a cuff about 40% of the arm circumference, wrapping it smoothly around the arm, and ensuring the cuff is wide enough to encircle and properly cover the arm.