If a blood pressure cuff is too small for a client, blood pressure readings taken with such a cuff may do which of the following?
A. Fail to show changes in blood pressure.
B. Produce a false-high measurement.
C. Cause sciatic nerve damage.
D. Produce a false-low measurement.
Correct Answer: B. Produce a false-high measurement.
Using an undersized blood pressure cuff produces a falsely elevated blood pressure because the cuff can’t record brachial artery measurements unless it’s excessively inflated.
Option A: Using a blood pressure cuff that’s too large or too small can give inaccurate blood pressure readings. The doctor’s office should have several sizes of cuffs to ensure an accurate blood pressure reading. When one measures their blood pressure at home, it’s important to use the proper size cuff.
Option C: The sciatic nerve wouldn’t be damaged by hyperinflation of the blood pressure cuff because the sciatic nerve is located in the lower extremity.
Option D: The inflatable part of the blood pressure cuff should cover about 40% of the distance around (circumference of) the upper arm. The cuff should cover 80% of the area from the elbow to the shoulder.