A nurse is collecting data from a client who has pneumonia and reports shortness of breath. The nurse notes the client has crackles auscultated in the lower lobes and an SaO2 of 88% on room air. Which of the following actions should the nurse take first?

A. "My baby has a yellowish layer covering their circumcision.": A thin yellow exudate on a circumcision site is a normal part of the healing process and represents the formation of a protective scab. It is not a sign of infection and does not require immediate reporting to the provider.

B. "My baby has crusty drainage in both eyes.": Bilateral eye crusting in a newborn may indicate conjunctivitis, which can be bacterial or viral and requires prompt evaluation. Newborn conjunctivitis can progress rapidly and may lead to complications if untreated, so the nurse should report this finding to the provider for timely intervention.

C. "My baby has loose stools that are greenish-yellow.": Loose, greenish-yellow stools are common in breastfed newborns due to the digestibility of breast milk and normal meconium transition. This finding is expected and does not indicate pathology.

D. "My baby's umbilical cord is still attached.": The umbilical cord typically detaches between 1–3 weeks of age. At 3 days old, it is normal for the cord to remain attached and requires only routine care and monitoring for signs of infection.

A. Negative urine ketones: Diabetic ketoacidosis (DKA) is characterized by increased production of ketone bodies due to insulin deficiency and enhanced lipolysis. Ketones accumulate in the blood and spill into the urine, producing positive urine ketone results. The absence of urine ketones does not support the presence of ketoacidosis, as ketosis is a defining metabolic feature.

B. Kussmaul respirations: Kussmaul respirations are deep, rapid breathing patterns that occur as a compensatory response to metabolic acidosis. In DKA, excess ketone production leads to accumulation of hydrogen ions and decreased serum bicarbonate. The respiratory system compensates by increasing ventilation to eliminate carbon dioxide.

C. Hypoglycemia: DKA is associated with hyperglycemia due to insufficient insulin, which prevents glucose from entering cells and leads to elevated serum glucose levels. Hypoglycemia involves low blood glucose and does not trigger the ketone overproduction seen in DKA. The pathophysiology of DKA centers on insulin deficiency and high circulating glucose.

D. Hypertension: Clients with DKA often experience osmotic diuresis from severe hyperglycemia, leading to dehydration and volume depletion. This intravascular fluid loss more commonly results in hypotension rather than elevated blood pressure. The hemodynamic changes in DKA are primarily related to dehydration and electrolyte imbalance.