A nurse is teaching the parent of a newborn about car seat safety. Which of the following statements should the nurse make?

Choice A reason:

Nevus flammeus, also known as a port-wine stain, is a flat, pink, red, or purple mark on the skin present at birth. It is a congenital vascular malformation and does not involve swelling that crosses suture lines.

Choice B reason:

Caput succedaneum is the correct diagnosis for swelling that crosses suture lines on a newborn's head, typically associated with a prolonged or difficult vaginal delivery, especially with the use of vacuum extraction.

Choice C reason:

Cephalohematoma is a collection of blood under the periosteum of the cranial bones that does not cross suture lines. It appears soon after birth and is usually caused by birth trauma.

Choice D reason:

Erythema toxicum is a common rash in newborns, presenting as red patches with small white or yellow pustules. It does not cause swelling over the head that crosses suture lines.

Choice A rationale:

Increased pancreatic activity during pregnancy causing fat intolerance is not related to the cause of indigestion and heartburn. Pancreatic activity can change during pregnancy, but it does not directly impact indigestion and heartburn.

Choice B rationale:

Increased estrogen production causing more hydrochloric acid in the stomach is not the cause of indigestion and heartburn during pregnancy. While hormones can influence digestion, the mechanism for indigestion and heartburn lies elsewhere.

Choice C rationale:

Pressure from the growing uterus pushing up on the stomach and intestines is a contributing factor to indigestion and heartburn during pregnancy. However, it is not the primary cause. The main cause is related to the relaxation of the cardiac sphincter.

Choice D rationale:

Progesterone causes relaxation of the cardiac sphincter, which is a muscular valve that prevents stomach acid from flowing back into the esophagus. When this sphincter relaxes, it can lead to acid reflux and subsequent indigestion and heartburn during pregnancy. The nurse should educate the client about this hormonal effect to help manage these symptoms effectively.