Which pregnant client is most at risk for ABO incompatibility?

A. Feeling hot when the room is cold is not a typical sign or complication of severe preeclampsia. This symptom is more related to general temperature sensitivity and does not indicate the hematologic or vascular complications associated with preeclampsia.

B. Evidence of bleeding, including gums bleeding, petechiae, and purpura, may indicate thrombocytopenia or a progression toward HELLP syndrome (Hemolysis, Elevated Liver enzymes, Low Platelets), a severe complication of preeclampsia. These findings suggest impaired coagulation and increased risk of bleeding, which are life-threatening if not promptly managed. Monitoring for such hematologic complications is essential in severe preeclampsia.

C. Edema of the lower extremities is common in normal pregnancy and mild preeclampsia, but it is not a specific sign of a serious complication. While generalized edema can indicate worsening preeclampsia, isolated lower-extremity edema is not as closely associated with life-threatening complications as bleeding or hematologic abnormalities.

D. Periods of fetal movement followed by quiet periods are typical fetal behavior and do not indicate a maternal complication of preeclampsia. Monitoring for changes in fetal movement is important, but this finding alone does not reflect maternal complications of severe preeclampsia.

A. The client shows signs of magnesium sulfate toxicity: oliguria (urine output <30 mL/hr) and absent deep-tendon reflexes. These are potentially life-threatening signs that require immediate intervention, including preparing for emergent delivery if maternal or fetal status is unstable. Stopping the magnesium infusion and preparing for emergency interventions is critical.

B. Administering Vitamin K is not indicated in this scenario. Vitamin K is used to treat or prevent coagulopathy, such as in newborns or clients on certain anticoagulants, but it does not counteract magnesium toxicity.

C. Increasing the magnesium sulfate infusion would worsen toxicity. The correct action is to stop the infusion immediately and prepare to administer calcium gluconate as an antidote if prescribed.

D. Assessing maternal glucose levels is unrelated to the immediate concern of magnesium toxicity. While glucose monitoring may be part of overall prenatal care, it is not a priority in this emergent situation.

E. Placing the client in Trendelenburg position is not indicated. Positioning does not treat magnesium toxicity and could worsen respiratory compromise in a client with severe preeclampsia. The priority is stopping magnesium, assessing maternal and fetal status, and preparing for emergency delivery if necessary.