Answer :

Final answer:

The proper blood pressure cuff for a 9-year-old child weighing 145 pounds should be based on arm circumference and may range from pediatric to small adult size, ensuring that the cuff's bladder length covers 80-100% of the arm's circumference.

Explanation:

The proper blood pressure cuff size for a 9-year-old child weighing 145 pounds should be selected based on the child's arm circumference rather than weight alone. Typically, children of this age might use a pediatric or small adult cuff, but if the child's upper arm circumference is larger due to their higher body weight, a larger cuff may be necessary.

It's important to use the correct cuff size because a cuff that is too small may yield falsely elevated blood pressure readings, while a cuff that is too large could result in readings that are too low.

To ensure accuracy, the bladder of the cuff should be about 40% of the arm circumference, and the length should cover 80-100% of the circumference of the upper arm. Healthcare providers usually have a range of cuff sizes available and will measure the child's arm to determine the most appropriate one.

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