A nurse is assisting in the care of a client who is at 18 weeks of gestation and reports nausea and vomiting daily that lasts throughout the day.
Which of the following findings indicates the client is experiencing a fluid imbalance?

Choice A rationale

Monitoring urine output is important for assessing fluid balance and kidney function, especially in the context of significant blood loss, as decreased output can indicate hypovolemia. However, actively addressing the source of the bleeding takes precedence over monitoring a secondary effect, as the immediate threat to life is uncontrolled hemorrhage.

Choice B rationale

Performing fundal massage is the highest priority because uterine atony, a relaxed uterus, is the most common cause of postpartum hemorrhage. Massaging the fundus stimulates uterine contractions, which compress blood vessels in the myometrium, thereby reducing blood loss and preventing life-threatening hemorrhage by promoting hemostasis at the placental site.

Choice C rationale

Applying oxygen by face mask is a supportive measure for hypovolemia and shock, increasing oxygen delivery to tissues. While important in a deteriorating situation, it does not address the root cause of the bleeding. The primary focus must be on stopping the hemorrhage before addressing the systemic effects of blood loss.

Choice D rationale

Weighing the perineal pad quantifies blood loss, which is important for accurate assessment of the severity of hemorrhage. While useful for diagnosis and monitoring, this action does not directly intervene to stop the bleeding. The immediate priority is to control the hemorrhage to prevent further blood loss and stabilize the client's condition.

Choice A rationale

An elevated maternal serum alpha-fetoprotein (MSAFP) level is a significant biomarker that can suggest an increased risk of open neural tube defects (NTDs), such as spina bifida or anencephaly. Alpha-fetoprotein is a protein produced by the fetal liver and yolk sac; in cases of open NTDs, larger amounts leak into the amniotic fluid and subsequently cross into the maternal bloodstream, resulting in higher MSAFP levels. Further diagnostic tests like ultrasound or amniocentesis are typically recommended to confirm the diagnosis.

Choice B rationale

Phenylketonuria (PKU) is an inherited metabolic disorder characterized by the inability to metabolize the amino acid phenylalanine. This condition is diagnosed through newborn screening tests that measure phenylalanine levels in the blood, not by maternal serum alpha-fetoprotein screening. MSAFP is not a marker for metabolic disorders like PKU, as it is primarily indicative of fetal structural anomalies, particularly neural tube defects.

Choice C rationale

Trisomy 21, also known as Down syndrome, is a chromosomal disorder caused by the presence of an extra copy of chromosome 21. While MSAFP is part of the "triple screen" or "quad screen" used for aneuploidy screening, an elevated MSAFP level alone is typically associated with neural tube defects. In cases of Trisomy 21, MSAFP levels are usually *lower* than normal, in conjunction with altered levels of other markers like human chorionic gonadotropin (hCG) and unconjugated estriol.

Choice D rationale

Hemophilia is a genetic bleeding disorder caused by a deficiency in specific clotting factors, primarily factors VIII or IX. This condition is inherited in an X-linked recessive pattern and is diagnosed through specialized blood tests that measure clotting factor activity. Maternal serum alpha-fetoprotein screening is not used to detect hemophilia, as it is a marker for fetal structural integrity, particularly concerning neural tube and abdominal wall defects.