A client brings their 4-year-old child to the clinic for a check-up. The nurse needs to measure the child's blood pressure. Which cuff size should the nurse select?

A. Incorrect. Pulling the child's earlobe down and back is a technique used for straightening the ear canal in older children and adults, not for using a tympanic thermometer.

B. Correct. When using a tympanic thermometer, it's important to gently insert the probe into the ear canal and ensure a proper seal. This helps to obtain an accurate temperature reading.

C. Incorrect. Holding the thermometer in place for 1-2 minutes is not the correct technique for tympanic temperature measurement. It may lead to an inaccurate reading.

D. Incorrect. Using an oral thermometer for a 2-year-old child is not the recommended method, as it may not provide an accurate temperature reading.

A. Incorrect. A cuff that covers only 50% of the upper arm circumference may be too small and lead to falsely elevated blood pressure readings.

B. Correct. Selecting a cuff that covers approximately 75% of the upper arm circumference is recommended for accurate blood pressure measurement in children. This ensures proper fit and accurate readings.

C. Incorrect. Using a cuff that covers 100% of the upper arm circumference may be too large, resulting in falsely low blood pressure readings.

D. Incorrect. A cuff that covers 125% of the upper arm circumference is overly large and not appropriate for accurate blood pressure measurement.