A nurse chooses to measure a client's temperature using a tympanic thermometer. Which advantage of this method should the nurse consider?

Rationale:

A. The normal adult respiratory rate ranges from 12 to 20 breaths per minute. A rate of 20 is at the upper end of normal and generally does not indicate respiratory compromise. While the nurse should continue routine monitoring, no immediate intervention is necessary in this context.

B. This is below the normal range and constitutes bradypnea, which is particularly concerning in a client receiving opioids. Opioid medications, such as morphine, hydromorphone, or fentanyl, can depress the central nervous system, leading to slowed or inadequate respirations. A respiratory rate of 8 breaths per minute indicates significant respiratory depression, which can result in hypoxia (low oxygen levels), hypercapnia (excess carbon dioxide), altered mental status, and potentially respiratory arrest if not addressed immediately. The nurse must take urgent action, which includes stopping or reducing the opioid if appropriate, stimulating the client to breathe, administering supplemental oxygen, monitoring oxygen saturation and vital signs, and notifying the prescribing provider. Early recognition and intervention are critical to prevent life-threatening complications.

C. This falls within the normal adult range and does not indicate respiratory compromise. The nurse should continue standard monitoring but no immediate action is required.

D. This is also within the normal adult range and reflects adequate ventilation. It does not necessitate immediate intervention.

Rationale:

A. A sunken anterior fontanel is not an expected finding in healthy infants. Normally, the anterior fontanel is level with the surrounding skull and may pulsate slightly with the heartbeat.

B. Increased intracranial pressure typically causes the fontanel to bulge, not sink. A bulging fontanel may indicate conditions such as hydrocephalus, meningitis, or intracranial hemorrhage.

C. While the fontanel allows for brain growth and skull expansion, a sunken fontanel does not indicate normal brain development. Normal development is reflected by a soft, flat, and appropriately sized fontanel.

D. A sunken anterior fontanel is a classic sign of dehydration in infants. Dehydration reduces the volume of intracranial fluid and tissues, causing the soft spot to appear concave. Other signs of dehydration may include dry mucous membranes, decreased urine output, lethargy, and poor skin turgor.