The nurse administers a RhoGAM injection to a client with a negative blood type at 28 weeks gestation.

The client asks the nurse if future injections of this medication are needed.

What is the best response by the nurse?

The nurse must understand the physiological status of a newborns coagulation system and the role of intestinal flora. Knowledge of the mechanism of vitamin K synthesis and the prevention of Vitamin K Deficiency Bleeding is essential for this response.

Choice A rationale

Maternal diet is not the primary cause of newborn vitamin K deficiency. Even with a perfect maternal diet, vitamin K does not easily cross the placenta, leaving all newborns with low levels of the vitamin at birth.

Choice B rationale

This statement is scientifically incorrect because vitamin K actually promotes and is essential for the synthesis of prothrombin and other clotting factors in the liver. It does not prevent synthesis; it is a required cofactor for it.

Choice C rationale

Newborns have a sterile gut at birth, lacking the bacteria necessary to synthesize vitamin K. This deficiency impairs the production of clotting factors 2, 7, 9, and 10, significantly increasing the risk of life-threatening hemorrhagic disease.

Choice D rationale

Vitamin K is not needed for a full year via injection. Once the infant begins feeding and intestinal flora are established, they can synthesize their own vitamin K. The risk is highest during the first week..

This question assesses the nurses ability to categorize signs of pregnancy as presumptive, probable, or positive. The nurse must apply knowledge of diagnostic criteria to explain why subjective symptoms are not definitive evidence of a developing fetus or pregnancy.

Choice A rationale

Presumptive signs like nausea and urinary frequency are subjective and can be caused by various conditions like infection or stress. Telling a client they are definitely pregnant based only on these symptoms is medically inaccurate and unprofessional.

Choice B rationale

A pregnancy test and fundal height are considered probable signs of pregnancy. While more objective than presumptive signs, they can still be influenced by other factors like molar pregnancies or tumors, thus they do not provide absolute certainty.

Choice C rationale

This is the best response because it acknowledges the clients symptoms while explaining that they are presumptive. Positive signs, such as hearing the fetal heartbeat, are the only definitive way to confirm a pregnancy is actually present.

Choice D rationale

Delaying assessment for four weeks is inappropriate when a client presents with missed periods and pregnancy symptoms. Immediate diagnostic steps are necessary to establish prenatal care, confirm the pregnancy, and rule out any potential ectopic or abnormal gestations.