A nurse is assessing a 1-year-old toddler and notices a large abdominal mass and pink-tinged urine on the diaper.

Which of the following disorders should the nurse suspect?

Choice A rationale

An Apgar score of 7 at 1 minute indicates that the infant is experiencing only mild difficulty with the transition to extrauterine life, and an Apgar score of 9 at 5 minutes indicates a successful adaptation. Severe distress requiring immediate, aggressive resuscitation is suggested by scores of 0 to 3, which is not the case here.

Choice B rationale

An Apgar score of 7 at 1 minute and a score of 9 at 5 minutes is the most common pattern, indicating the newborn is successfully adjusting to extrauterine life with minimal or no difficulty. The score of 7 suggests some minor, non-life-threatening depression at birth that resolved quickly by the 5-minute assessment.

Choice C rationale

Moderate difficulty and the potential need for some intervention, such as oxygen or tactile stimulation, would typically be suggested by an Apgar score in the range of 4 to 6 at 1 minute. The score of 7 suggests a better initial status than moderate difficulty, and the score of 9 confirms a successful transition.

Choice D rationale

The Apgar score is primarily an assessment of a newborn's cardiorespiratory and neurological status during the immediate transition phase, and while it is generally a good indicator of immediate neonatal well-being, it is a poor predictor of long-term neurologic future outcomes. Low scores persisting at 5 minutes are more concerning for future outcomes.

Choice A rationale

Evaporation is the loss of heat that occurs when water is converted to vapor (e.g., from wet skin after birth or bathing, or from insensible water loss through the skin and respiratory tract). Placing a blanket on the scale prevents heat transfer from the newborn's skin directly to the cold surface of the scale, which is the definition of conduction, not evaporation.

Choice B rationale

Conduction is the loss of heat from the newborn to a colder object or surface with which it is in direct contact, such as a cold mattress, scale, or stethoscope. By placing a warmed blanket on the scale, the nurse creates a layer that minimizes this direct contact and subsequent heat transfer, thus preventing significant heat loss via conduction.

Choice C rationale

Convection is the heat loss from the newborn's skin to the surrounding cooler air currents or air movement (e.g., drafts from doors, air conditioning). While controlling ambient air temperature helps minimize convection, covering a cold surface like a scale addresses heat loss through the direct contact mechanism of conduction, not convection.

Choice D rationale

Radiation is the loss of heat from the newborn's body surface to nearby cooler objects that are not in direct contact (e.g., cold walls of the incubator or examination room windows). Covering the scale does not prevent radiant heat loss; radiant heat loss is mitigated by keeping the newborn away from cold surfaces and ensuring the surrounding objects are warmed, not by surface coverage. —.