The nurse is caring for an infant with candidal diaper rash. Which topical agent would the nurse expect the healthcare provider to order?

A. It is a type IV hypersensitivity reaction: Urticaria is typically a type I hypersensitivity reaction mediated by IgE, not a delayed type IV reaction. Type IV reactions involve T-cell–mediated responses, such as contact dermatitis, rather than immediate histamine-mediated reactions.

B. Histamine release leads to vasodilation: Urticaria results from mast cell degranulation and histamine release, which increase vascular permeability and cause local vasodilation. This leads to the characteristic erythema, swelling, and itching associated with hives.

C. Wheals appear first followed by erythema: In urticaria, erythema and wheals usually appear simultaneously as a result of histamine-induced vasodilation and plasma leakage into the dermis. There is no distinct sequence of wheals followed by erythema.

D. The nonpruritic rash blanches with pressure: Urticarial lesions are typically pruritic (itchy), not nonpruritic, and may blanch under pressure due to transient vasodilation. Pruritus is a hallmark symptom distinguishing urticaria from other rashes.

A. "Your child will do well after birth once transfusions are administered": This statement focuses on postnatal intervention rather than preventing maternal sensitization during pregnancy, which is the primary purpose of RhoGAM.

B. "RhoGAM kills antibodies you make, so your kid will be protected": RhoGAM does not destroy existing antibodies; it prevents the formation of maternal antibodies against Rh-positive fetal cells. This explanation could mislead the patient.

C. "Your baby may be Rh positive and cause you to make antibodies. These won't affect this baby, but could affect future children if RhoGAM isn't given": RhoGAM prevents maternal sensitization by neutralizing fetal Rh-positive red blood cells before the immune system responds. This explanation clearly communicates the purpose of the medication and the relevance for future pregnancies.

D. "If the baby is Rh negative at birth, he or she will need RhoGAM also": RhoGAM is administered to the mother, not the baby, and is only necessary if the mother is Rh-negative and the fetus is Rh-positive.