A nurse is reviewing the laboratory data of a client who received 2 units of packed RBCs.

Which of the following laboratory findings should the nurse expect following the transfusion?

A. BP 150/92 mm Hg:

• This blood pressure reading is elevated and not a therapeutic effect of magnesium sulfate. In the context of preeclampsia, the goal is usually to lower blood pressure to prevent complications.

B. Pulse rate 100/min:

• The pulse rate of 100/min is not a specific therapeutic effect of magnesium sulfate. However, magnesium sulfate may cause a decrease in heart rate, so monitoring for bradycardia would be important.

C. Flushed face:

• A flushed face is not a specific therapeutic effect of magnesium sulfate. Facial flushing may be associated with other factors, but it is not a primary consideration when monitoring the effectiveness of magnesium sulfate in the context of preeclampsia.

D. Negative clonus:

• Negative clonus is the correct therapeutic effect to monitor. Clonus refers to a series of involuntary, rhythmic, and repetitive muscle contractions and relaxations. In the context of magnesium sulfate administration for preeclampsia, negative clonus (the absence of abnormal reflexes) is a sign that the magnesium levels are within the therapeutic range, helping to prevent seizures.

This is a sign of preeclampsia, a serious complication of pregnancy that can cause high blood pressure, proteinuria, and seizures.

Preeclampsia can affect the placenta, the kidneys, the liver, and the brain of the mother and the fetus. It requires immediate medical attention and may lead to early delivery.

Choice A, bleeding gums, is wrong because it is a common occurrence during pregnancy due to hormonal changes that increase blood flow to the gums. It is not a cause for concern unless it is excessive or accompanied by other symptoms.

Choice B, urinary frequency, is wrong because it is also a normal finding during pregnancy due to the growing uterus putting pressure on the bladder. It is not a sign of infection or kidney problems unless it is associated with pain, burning, or blood in the urine.

Choice D, faintness upon rising, is wrong because it is usually caused by orthostatic hypotension, a drop in blood pressure when changing positions.

This can happen during pregnancy due to the dilation of blood vessels and the increased blood volume. It can be prevented by rising slowly, drinking enough fluids, and avoiding prolonged standing.