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

Choice A Reason: Maintain the client on strict bedrest. This is an inappropriate action that may worsen the client's condition and increase her isolation and depression. Postpartum psychosis requires prompt psychiatric treatment with medication and psychotherapy, not bedrest.

Choice B Reason: Carefully monitor intake and output. This is an irrelevant action that has no direct relation to postpartum psychosis or its management. Monitoring intake and output may be indicated for other postpartum complications such as hemorrhage, infection, or preeclampsia.

Choice C Reason: Restrict visitation of the client's partner. This is an unnecessary action that may deprive the client of social support and emotional comfort. The partner may be an important source of help and information for the client and the health care team. The partner should be involved in the client's care and education, unless there are signs of abuse or violence.

Choice D Reason: Closely supervise all infant care and interaction. This is because postpartum psychosis is a severe mental disorder that occurs in some women after childbirth, which can cause delusions, hallucinations, paranoia, mood swings, confusion, and suicidal or homicidal thoughts. Postpartum psychosis can pose a danger to both the mother and the infant, as the mother may harm herself or the infant due to distorted perceptions or impulses. The nurse should closely supervise all infant care and interaction to ensure safety and prevent injury.

Choice A Reason: IgG. This is an incorrect answer that refers to a different type of antibody that is not abundant in breast milk. IgG is a type of antibody that provides systemic immunity against various antigens. IgG is found in low concentrations in breast milk, as it does not cross the mammary epithelium easily. IgG can protect the infant from some infections, but it is mainly transferred from the mother to the fetus through the placenta during pregnancy.

Choice B Reason: IgE. This is an incorrect answer that refers to a different type of antibody that is not relevant to breast milk. IgE is a type of antibody that mediates allergic reactions and parasitic infections. IgE is found in very low concentrations in breast milk, as it does not have a significant role in mucosal immunity. IgE can trigger mast cells and basophils to release histamine and other inflammatory mediators, which can cause symptoms such as itching, swelling, or bronchoconstriction.

Choice C Reason: IgA. This is because IgA is a type of antibody that protects mucosal surfaces from pathogens and toxins. IgA is found in high concentrations in breast milk, especially in colostrum (the first milk produced after delivery). IgA can bind to bacteria and viruses in the infant's gastrointestinal tract and prevent them from ataching to the intestinal wall or crossing into the bloodstream. IgA can also enhance the infant's immune system by stimulating lymphoid tissue development and modulating inflammatory responses.

Choice D Reason: IgM. This is an incorrect answer that refers to a different type of antibody that is not abundant in breast milk. IgM is a type of antibody that activates complement system and agglutinates antigens. IgM is found in low concentrations in breast milk, as it does not cross the mammary epithelium easily due to its large size. IgM can protect the infant from some infections, but it is mainly produced by the infant's own immune system in response to exposure to antigens.