The nurse administers vitamin K intramuscularly as prophylaxis to the newborn based on which of the following rationales?
Select one:

Choice A Reason: Place the infant skin to skin with the mother and re-check temperature in 30 minutes. This is because skin-to-skin contact is an effective and safe method of increasing the infant's temperature and promoting thermoregulation. Skin-to-skin contact also has other benefits such as enhancing bonding, breastfeeding, and maternal-infant attachment.

Choice B Reason: Check the infant's CBC and blood cultures, as this is a sign of probable sepsis. This is an unnecessary action that may cause undue stress and discomfort to the infant and the mother. A slightly decreased temperature in a full-term infant is not a sign of probable sepsis, but rather a common finding that may be due to environmental factors, such as exposure to cold air or wet linens.

Choice C Reason: Return the infant to the nursery for close observation under warming lights. This is an undesirable action that may interfere with the early initiation of breastfeeding and bonding between the mother and the infant. Warming lights are not recommended for routine use in healthy newborns, as they may cause dehydration, hyperthermia, or eye damage.

Choice D Reason: Notify the physician immediately and suggest orders for placement in an incubator. This is an excessive action that may indicate a lack of knowledge or confidence on the part of the nurse. An incubator is not indicated for a stable, full term infant with a slightly decreased temperature, as it may expose the infant to unnecessary interventions, infections, or separation from the mother.

Choice A Reason: Vascular spider veins. This is an incorrect answer that refers to a different skin change that occurs during pregnancy, which affects the blood vessels, not the pigment. Vascular spider veins are small red or purple clusters of blood vessels that appear on the skin, especially on the face, neck, chest, or legs. Vascular spider veins are caused by increased blood volume and hormonal changes, which dilate and rupture the capillaries. Vascular spider veins are harmless and usually disappear after delivery.

Choice B Reason: Linea nigra. This is because linea nigra is a term that refers to a darkened vertical line that appears on the abdomen during pregnancy, which runs from the umbilicus to the pubis. Linea nigra is caused by increased production of melanin, which is a pigment that gives color to the skin and hair. Linea nigra is more common and noticeable in women with darker skin tones, and it usually fades after delivery.

Choice C Reason: Melasma. This is an incorrect answer that refers to a different skin change that occurs during pregnancy, which affects the pigment, but not in a linear patern. Melasma is a term that refers to patches of brown or gray-brown discoloration that appear on the face, especially on the forehead, cheeks, nose, or upper lip. Melasma is also caused by increased production of melanin, but it is influenced by sun exposure and genetic factors. Melasma is also known as chloasma or the mask of pregnancy, and it may persist after delivery.

Choice D Reason: Striae gravidarum. This is an incorrect answer that refers to a different skin change that occurs during pregnancy, which affects the connective tissue, not the pigment. Striae gravidarum are stretch marks that appear on the skin, especially on the abdomen, breasts, hips, or thighs. Striae gravidarum are caused by rapid growth and stretching of the skin, which damage the collagen and elastin fibers. Striae gravidarum are initially red or purple, but they fade to white or silver after delivery.