A nurse is assessing a client who is in preterm labor and has a new prescription for terbutaline 0.25 mg subcutaneous.
For which of the following findings should the nurse withhold the medication and report to the provider?

When a client is receiving magnesium sulfate by continuous IV infusion for preterm labor, it is important for the nurse to review the serum medication level to ensure that the client is receiving an appropriate dose and to monitor for signs of magnesium toxicity.
Choice A is not an answer because an indirect Coombs test is used to detect antibodies against red blood cells and is not relevant to magnesium sulfate therapy.
Choice C is not an answer because liver enzymes are not directly relevant to magnesium sulfate therapy.
Choice D is not an answer because uric acid levels are not directly relevant to magnesium sulfate therapy.

Rationales

A. Rust-stained urine.
Rust or brick-dust staining in the diaper is usually caused by urate crystals in the urine. This is a common and benign finding in newborns during the first days of life, particularly when fluid intake is still low. It does not require provider notification unless it persists beyond the first week or is accompanied by other abnormalities.

B. Subconjunctival hemorrhage.
A subconjunctival hemorrhage often results from pressure during delivery, especially in vaginal births. It appears as a bright red patch on the sclera but is harmless and resolves spontaneously within several weeks. It is considered a normal newborn finding and does not need to be reported.

C. Single palmar creases.
A single transverse palmar crease, also known as a simian crease, can be associated with chromosomal abnormalities such as Down syndrome. While it may sometimes be an isolated normal variant, its presence warrants further evaluation. The nurse should report this finding to the provider for assessment and potential genetic follow-up.

D. Transient circumoral cyanosis.
Brief bluish discoloration around the lips in a newborn is typically due to vasomotor instability and is common when the infant is crying or cold. As long as the central mucous membranes remain pink and oxygenation is normal, this finding is not concerning and usually resolves without intervention.