Four newborns were admitted into the neonatal nursery 1 hour ago. They are all sleeping in overhead warmers. Which of the babies should the nurse ask the neonatologist to evaluate?

A) Bacteria that synthesize vitamin K are not present in the newborn's intestinal tract:
Newborns are born with a sterile gastrointestinal tract, meaning they do not yet have the intestinal bacteria necessary to synthesize vitamin K. Vitamin K is essential for the activation of clotting factors, and without sufficient vitamin K, newborns are at risk for bleeding disorders, particularly a condition known as vitamin K deficiency bleeding (VKDB). Administering vitamin K by injection shortly after birth ensures the baby has adequate levels to prevent bleeding.
B) Vitamin K prevents the synthesis of prothrombin in the liver and must be given by injection:
This statement is incorrect. Vitamin K does not prevent the synthesis of prothrombin; rather, it is essential for the liver to synthesize clotting factors, including prothrombin. The injection of vitamin K in newborns is necessary to provide adequate levels of vitamin K to support proper blood clotting, as newborns cannot produce enough on their own at birth due to the absence of gut bacteria that normally produce it.

C) The supply of vitamin K is inadequate for at least 12 months, and the newborn must be supplemented throughout infancy:
While it is true that newborns have a limited supply of vitamin K at birth, this deficiency is typically addressed with a single injection given shortly after birth. Supplementing vitamin K throughout infancy is generally not required, as the infant's gastrointestinal tract will start to develop the necessary bacteria to synthesize vitamin K within the first few weeks to months of life. The first dose of vitamin K prevents bleeding disorders, and in most cases, additional supplementation is not necessary.

D) Most mothers have a diet deficient in vitamin K, which results in the infant being deficient:
While maternal diet does play a role in the newborn's initial vitamin K levels, it is not the primary reason for the deficiency. Vitamin K deficiency in newborns is primarily due to the lack of gut bacteria necessary to produce it, rather than maternal diet. The practice of administering vitamin K to all newborns ensures that they receive adequate levels to prevent bleeding, regardless of maternal dietary intake.

A) Rubra, serosa, alba:
The normal progression of lochia, the vaginal discharge after childbirth, follows a predictable sequence of stages. Lochia rubra is the initial stage, occurring within the first few days postpartum. It is bright red and consists primarily of blood, tissue, and debris from the placenta. After 3-4 days, the discharge changes to lochia serosa, which is pinkish-brown and contains a mixture of blood, serous fluid, and mucous. After 10-14 days, it progresses to lochia alba, which is white or pale yellow and consists mostly of leukocytes (white blood cells), mucus, and epithelial cells. This is the expected progression, which marks the natural healing process after childbirth.

B) Rubra, alba, serosa:
This order is incorrect because lochia serosa comes before lochia alba in the normal sequence. Lochia alba occurs after lochia serosa, not before. This progression would not accurately reflect the typical stages of lochia.

C) Serosa, alba, rubra:
This sequence is incorrect as lochia rubra is the first stage, not lochia serosa. The initial discharge following childbirth is always red and blood-tinged, which is lochia rubra. Serosa and alba come later in the progression, so this order does not follow the correct timeline.

D) Alba, rubra, serosa:
This order is completely incorrect. Lochia rubra (red blood discharge) is the first stage, not lochia alba (white discharge). After childbirth, rubra occurs first, followed by serosa, and then finally alba. This sequence does not reflect the normal postpartum discharge process.