A nurse is preparing to measure an infant's vital signs. The nurse should use which of the following sites to assess a heart rate?

Following a cardiac catheterization, the nurse should provide the parent with appropriate discharge instructions to ensure the child's proper recovery. The correct instruction to include is option B: "Give the child acetaminophen for discomfort."

Explanation:

Option A: Offering the child clear liquids for the first 24 hours is not a typical instruction following a cardiac catheterization. After the procedure, the child may be allowed to resume a regular diet, as tolerated, based on the healthcare provider's orders.

Option B: This is the correct instruction. After cardiac catheterization, the child may experience some discomfort at the insertion site or the area where the catheter was threaded through the blood vessels. Acetaminophen can be used to manage mild pain or discomfort.

Option C: Taking a tub bath for the first 3 days is not typically mentioned in discharge instructions after a cardiac catheterization. The nurse might advise the parent to avoid submerging the catheter insertion site in water for a specific period and instead use sponge baths until permitted by the healthcare provider.

Option D: Keeping the child home for 1 week is not a standard recommendation for a cardiac catheterization. The recovery period after a cardiac catheterization is usually shorter, and the child can often resume normal activities within a day or two, depending on the specific circumstances of the procedure and the child's condition.

The nurse should thoroughly review the specific discharge instructions provided by the healthcare provider and ensure the parent understands the care required at home, including any restrictions on activities or signs of potential complications that require immediate attention.

In this scenario, the infant has a heart rate of 190/min and a fever of 40°C (104°F). Fever in infants can cause an increase in heart rate, which is a normal physiological response to elevated body temperature. Fever is the body's way of responding to an infection or illness, and it triggers various physiological changes, including an increase in heart rate. This helps the body to circulate blood and deliver immune cells to fight off the infection.
The other options are not accurate or relevant to the infant's current condition:
A. "This is within the expected range for your baby." - A heart rate of 190/min is above the normal expected range for a 2-month-old infant, which is typically between 120 to 160 beats per minute. This response would not address the elevated heart rate and fever.
C. "As your baby begins to fall asleep, his heart rate will decrease." - While heart rate may decrease during sleep, it does not explain the elevated heart rate and fever observed in this situation.
D. "Your baby's heart is beating fast in an attempt to cool down his body." - While tachycardia (fast heart rate) can be associated with increased metabolic demands during fever, the main reason for the increased heart rate in this case is the fever itself, not the body's attempt to cool down. Fever is a response to infection or illness and can cause an increase in heart rate as part of the body's normal immune response.