A patient is 3 days post c-section delivery for eclampsia. The client is receiving hydralazine (Apresoline). Which of the following would indicate that the medication is effective?

A. Midplane contracture of the pelvis. Pelvic contractures can lead to dystocia by restricting the fetal head's descent. A midplane contracture narrows the pelvic midsection, making labor prolonged and difficult. This is a common cause of dystocia.

B. Disproportion of the pelvis. Cephalopelvic disproportion (CPD), where the fetal head is too large for the maternal pelvis, is a well-known cause of dystocia. It often results in prolonged labor, failure to progress, and the need for cesarean delivery.

C. Low-lying placenta. A low-lying placenta does not directly cause dystocia. Instead, it may lead to placenta previa, which often requires cesarean delivery before labor even begins. Since it does not typically cause prolonged or difficult labor, it is the least common cause of dystocia.

D. Compromised bearing-down efforts as a result of pain medication. Excessive pain medication, especially epidurals or narcotics, can weaken maternal pushing efforts, leading to prolonged second-stage labor. This is a recognized cause of dystocia, particularly in multiparous women.

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.