The nurse is caring for a pregnant woman who is HIV positive. While teaching her about the use of antiretroviral drugs, the nurse explains that these medications will

A. Quantity of vaginal bleeding. While both placenta previa and abruptio placentae can cause vaginal bleeding, the amount alone does not differentiate between the two conditions. Placenta previa typically causes painless, bright red bleeding, whereas abruptio placentae often presents with concealed or variable bleeding, making quantity an unreliable distinguishing factor.

B. Presence of abdominal pain. Abdominal pain is a key differentiating factor. Placenta previa is characterized by painless vaginal bleeding, while abruptio placentae causes sudden, severe abdominal pain due to placental detachment and uterine muscle irritation. This makes the presence or absence of pain an important assessment finding.

C. Leopold's maneuver results. While Leopold’s maneuvers help determine fetal position and presentation, they do not provide definitive information about the location of the placenta or differentiate between placenta previa and abruptio placentae. Ultrasound is a more reliable diagnostic tool for this purpose.

D. Maternal blood pressure. Although abruptio placentae can lead to hypovolemic shock and blood pressure changes due to hemorrhage, maternal blood pressure alone is not a primary diagnostic criterion for differentiating between the two conditions. Other clinical findings such as pain and ultrasound results are more useful for diagnosis.

A. The patient's blood pressure dropped from 160/120 to 130/90. Hydralazine is an antihypertensive medication used to lower blood pressure in conditions such as eclampsia. A reduction in blood pressure indicates that the medication is achieving its intended effect of controlling hypertension, reducing the risk of complications like stroke or organ damage.

B. The patient states that her headache is gone. While headaches are a symptom of severe hypertension, their resolution does not directly confirm the effectiveness of hydralazine. Other factors, such as pain relief or improved postpartum recovery, could contribute to headache relief.

C. The patient's postoperative weight has dropped from 155 to 144 pounds. Postpartum weight loss is expected due to fluid shifts and loss of pregnancy-related fluids, but it is not a direct measure of hydralazine’s effectiveness. The medication does not act as a diuretic or weight-loss agent.

D. The patient has had no seizures since delivery. While hydralazine helps lower blood pressure, preventing seizures in eclamptic patients is primarily managed with magnesium sulfate, not hydralazine. The absence of seizures is important but does not indicate the specific effectiveness of this antihypertensive medication.