A newborn is delivered by vaginal birth at 40 weeks of gestation.
Which of the following findings should the nurse report to the provider?

Choice A rationale

A newborn's heart rate typically ranges from 120 to 160 beats per minute, and respirations are normally between 30 and 60 breaths per minute. A heart rate of 160/min and respirations of 40/min fall within these normal physiological ranges for a newborn, indicating adequate cardiovascular and respiratory adaptation to extrauterine life.

Choice B rationale

The average head circumference for a full-term newborn ranges from 33 to 35 cm, and the chest circumference is typically 2 to 3 cm less than the head circumference. A head circumference of 40 cm is significantly larger than the normal range, and a chest circumference of 32 cm suggests an abnormal head-to-chest ratio. These measurements could indicate hydrocephalus or other developmental anomalies and warrant immediate reporting to the provider for further assessment.

Choice C rationale

A positive Babinski reflex, characterized by dorsiflexion of the big toe and fanning of the other toes, is a normal neurological finding in newborns and infants up to 12-24 months of age, indicating an immature corticospinal tract. A negative Ortolani's sign indicates the absence of hip dislocation or dysplasia, which is a normal and desired finding, reflecting stable hip joints.

Choice D rationale

Acrocyanosis, which is the bluish discoloration of the hands and feet, is a common and normal finding in newborns during the first 24 to 48 hours after birth due to immature peripheral circulation. Caput succedaneum, a localized swelling of the scalp that crosses suture lines, is also a common and benign finding resulting from pressure during vaginal birth, typically resolving spontaneously within a few days.

Choice A rationale

A normal serum sodium level ranges from 135 to 145 mEq/L. A value of 120 mEq/L is significantly below the normal range, indicating hyponatremia, not an elevated level. Therefore, reporting it as elevated would be incorrect.

Choice B rationale

While laboratory errors can occur, a serum sodium level of 120 mEq/L in a client with chronic renal failure is a plausible finding due to impaired fluid and electrolyte balance, making a repeat analysis not the immediate primary interpretation without further clinical context.

Choice C rationale

While electrolyte abnormalities are common in chronic renal failure, a serum sodium of 120 mEq/L is a low sodium level (hyponatremia), not necessarily an "expected" abnormality in the sense of being benign or typical without specific context. It reflects a significant imbalance.

Choice D rationale

Chronic renal failure often leads to fluid retention due to impaired kidney excretion. This excessive water retention dilutes the body's sodium concentration, leading to a condition known as dilutional hyponatremia, where the total body sodium may be normal or even elevated, but its concentration is lowered by the excess fluid.