A nurse is preparing to administer medication to a preschooler and must convert the child's weight from pounds to kilograms. The child weighs 30 lb. How many kilograms does the child weigh?

(Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

The correct answer is choice A.

Choice A rationale:

Count the client's radial and apical pulses simultaneously with another nurse. Rationale: In the presence of an irregular heart rate, a pulse deficit might indicate a discrepancy between the peripheral (radial) and central (apical) pulses. Counting the pulses simultaneously with another nurse helps to accurately assess this deficit. By comparing the two pulse rates, the nurse can identify if there is a difference, which might indicate inadequate circulation or irregular heartbeats that aren't effectively transmitting to the peripheral arteries.

Choice B rationale:

Calculate the client's pulse for 30 seconds and multiply by 2. Rationale: While calculating the pulse rate for 30 seconds and then multiplying by 2 is a valid method to determine the heart rate, it doesn't address the specific concern of a pulse deficit. This approach might help in assessing the overall heart rate but doesn't provide information about potential irregularities or discrepancies between peripheral and central pulses.

Choice C rationale:

Assist the client to a side-lying position. Rationale: Assisting the client to a side-lying position doesn't directly relate to the assessment of a pulse deficit. The position of the client wouldn't significantly impact the assessment of irregular heart rates or pulse deficits.

Choice D rationale:

Auscultate the area of the client's chest over the Erb's point. Rationale: Auscultating the area of the client's chest over the Erb's point is a technique used to assess heart sounds, particularly the S2 heart sound. This technique is not relevant to assessing a pulse deficit. It can provide information about heart valve function but doesn't help in evaluating a discrepancy between peripheral and central pulses.

The correct answer is 13.6 kg.

To convert pounds to kilograms, the formula is weight in pounds divided by 2.2. Given the child's weight is 30 lb, the calculation would be 30 / 2.2 ≈ 13.64 kg. Rounding to the nearest tenth gives us 13.6 kg.