A nurse is reinforcing teaching about vitamin K with a client who is postpartum. Which of the following statements should the nurse include?

Choice A rationale Vitamin K's primary physiological role is in coagulation, not in enhancing the immune system to prevent healthcare-associated infections. Newborns receive vitamin K to prevent bleeding disorders, not to boost their immunity against bacterial or viral pathogens. Infection control practices are crucial for preventing healthcare-associated infections, not vitamin K administration. Choice B rationale Vitamin K is essential for the synthesis of clotting factors II, VII, IX, and X in the liver. Newborns have immature livers and limited vitamin K stores, making them susceptible to Vitamin K Deficiency Bleeding (VKDB), also known as hemorrhagic disease of the newborn. Administering vitamin K prophylactically decreases this risk, preventing potentially life-threatening bleeding episodes. Choice C rationale Vitamin K is administered to prevent hemorrhagic disorders and has no known direct impact on reducing complications specifically from the Hepatitis B vaccine. The Hepatitis B vaccine stimulates active immunity against the Hepatitis B virus. Any complications from vaccination are unrelated to the infant's vitamin K status or coagulation cascade. Choice D rationale Jaundice in newborns is primarily caused by elevated unconjugated bilirubin levels due to physiological processes like increased red blood cell breakdown and immature liver conjugation. Vitamin K does not play a role in bilirubin metabolism or excretion, and therefore, it does not decrease the newborn's risk of jaundice. Phototherapy or other interventions are used for hyperbilirubinemia.