What is a factor to consider when using a blood pressure cuff?

When measuring blood pressure using a cuff, it is crucial for the cuff size to be appropriate for the individual's arm circumference to ensure accurate readings. The correct guideline states that the cuff width should be approximately 40% of the arm circumference. This size maximizes the accuracy of the measurement by ensuring that the cuff can completely encircle the arm, providing consistent pressure across the entire area of the cuff.

If the cuff is too small, it may lead to erroneously high readings, as it exerts pressure unevenly. Conversely, if the cuff is too large, it may produce readings that are incorrectly low. This is why selecting the proper cuff size in relation to arm circumference is essential for obtaining reliable blood pressure measurements in a clinical setting.