A 10-month-old infant diagnosed with developmental dysplasia of the hip (DDH) has been fitted with a Pavlik harness. During a follow-up visit, the nurse notices redness and skin breakdown under the straps. What is the most appropriate nursing action to address this complication while maintaining effective treatment?

A. "It depends on what caused the defect" is incorrect because while risk factors may vary, the critical period for heart development is well-established. Heart formation occurs during a specific window in fetal development, regardless of the cause.

B. "They usually occur in the first 2 weeks of development" is incorrect because the first two weeks after fertilization (the pre-embryonic period) involve cellular proliferation and implantation, not organ formation. Heart structures have not yet developed during this period.

C. "We don't really know when such defects occur" is incorrect because the timing of congenital heart development is well-documented. Most defects arise during a defined embryonic period.

D. "They occur between the third and eighth weeks of development" is correct. The heart begins forming in the third week after fertilization, and most major structural cardiac development occurs by the eighth week. Exposure to teratogens, maternal illnesses, or genetic factors during this period can lead to congenital heart defects.

A. Administering oxygen via a nonrebreather mask is incorrect as the priority action. Although oxygen can improve fetal oxygenation, it does not directly relieve compression of the umbilical cord, which is the immediate, life-threatening issue in a prolapsed cord. Oxygen may be used after cord compression is relieved, but it is not the first intervention.

B. Placing a rolled towel beneath one of the client’s hips is incorrect because this action alone is insufficient to relieve pressure on the umbilical cord. While positioning such as Trendelenburg or knee-chest may help reduce cord compression, the most immediate and effective intervention is manual elevation of the presenting part.

C. Applying internal upward pressure to the presenting part using two gloved fingers is correct because this action immediately relieves pressure on the prolapsed umbilical cord, restoring fetal blood flow and oxygenation. The nurse must maintain this pressure continuously until the patient is taken for emergency delivery, usually by cesarean section. This is the highest priority life-saving intervention.

D. Increasing the IV infusion rate to provide a fluid bolus is incorrect because fluids do not address the mechanical compression of the umbilical cord. Although IV fluids may be part of overall management, they do not correct the acute cause of fetal hypoxia in cord prolapse.