A 9-year-old often comes to the school nurse complaining of stomach pains. The teacher says that the child has lately been somewhat aggressive and stubborn in the classroom. What should the school nurse recognize as the possible trigger for these behaviors?

The correct answer is choice A. The cuff bladder covers 50% to 66% of the length of the upper arm.

Choice A rationale:

Selecting a blood pressure cuff with a bladder that covers 50% to 66% of the length of the upper arm is the appropriate criterion for determining the cuff size for a 2-year-old boy. This range ensures accurate blood pressure measurement by ensuring a proper fit on the arm. If the cuff bladder is too small or too large, it can result in inaccurate readings.

Choice B rationale:

The label "toddler" on the cuff might be helpful in identifying the intended age group, but it doesn't provide precise measurements for cuff sizing. Relying solely on a label might not account for variations in arm sizes within the toddler age group.

Choice C rationale:

The cuff bladder width being 40% of the circumference of the upper arm might not be as accurate as the length-based criterion. A cuff that fits the arm's length is more critical in ensuring proper inflation and accurate blood pressure measurement.

Choice D rationale:

The cuff bladder length covering 80% to 100% of the circumference of the upper arm might result in an excessively large cuff for a 2-year-old, which can lead to inaccurate readings. Length-based sizing is more appropriate for accuracy in this scenario.

The correct answer is choice A. Potassium.

Choice A rationale:

Diuretics like furosemide are commonly used to treat congestive heart failure. They work by increasing the excretion of water and electrolytes, including potassium, from the body. Low levels of potassium (hypokalemia) can lead to various complications, including cardiac arrhythmias and muscle weakness. Since furosemide can cause potassium loss, it's important to ensure an adequate intake of potassium-rich foods. Bananas, oranges, and leafy vegetables are excellent sources of potassium. Therefore, the nurse encourages the family to include these foods in the child's diet to help maintain a healthy potassium balance.

Choice B rationale:

Sodium is an important electrolyte, but in the context of congestive heart failure and diuretic use, the focus is more on avoiding excessive sodium intake. Diuretics like furosemide aim to reduce fluid retention by increasing sodium excretion, so it's not necessary to recommend high-sodium foods. Moreover, excessive sodium intake could exacerbate fluid retention and worsen the heart failure.

Choice C rationale:

Chlorides are often found in table salt (sodium chloride) and are not typically emphasized in the context of heart failure treatment or diuretic use. While they play a role in maintaining electrolyte balance, they are not the primary focus in this scenario.

Choice D rationale:

Zinc is a mineral that is not directly related to the treatment of congestive heart failure or the use of diuretics. It is important for various cellular functions and immune system support, but it's not the electrolyte of concern in this situation.