A patient is obese. At the bedside is a standard-size blood pressure cuff. The nurse realizes that the use of this cuff will provide which of the following?
a. Accurate readings as long as it is 20% of the circumference of the midpoint of the limb.
b. Indistinct readings if the bladder encircles 80% of the adult's arm.
c. A falsely low reading if the cuff is wrapped too loosely around the arm.
d. Inaccurate readings and needs to be replaced with a larger cuff.
D
When the incorrect size cuff is used, it is possible to obtain a false reading. The size selected is proportional to the circumference of the limb being assessed. Ideally select a cuff that is 40% of the circumference (or 20% wider than the diameter) of the midpoint of the limb being used to be obtain measurements. The bladder, enclosed by the cuff, encircles at least 80% of the arm of an adult and the entire arm of a child. A cuff that is wrapped too loosely or unevenly will yield false-high readings.
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