Final answer:
For a primigravida at 40-weeks' gestation with preeclampsia who has had a seizure, the nurse should monitor blood pressure, update the healthcare provider, and follow preeclampsia protocol, possibly including administration of calcium gluconate if magnesium sulfate toxicity is suspected.
Step-by-step explanation:
In the case of a primigravida at 40-weeks' gestation with preeclampsia who has had a seizure, the nurse's priority is to stabilize the mother and the unborn child. The seizure suggests that the preeclampsia may have progressed to eclampsia, a severe complication. The most urgent actions are to ensure that the mother is in a safe environment to prevent injury from further seizures, to monitor the blood pressure closely, to update the healthcare provider on the client's status including lab results, and to follow preeclampsia protocol which may include the administration of antihypertensive medications and seizure prophylaxis such as magnesium sulfate.
Calcium gluconate could be appropriate if magnesium sulfate toxicity is suspected. This information is based on clinical practices in obstetrics and should always be aligned with the protocols of the healthcare institution and the directives of the healthcare provider.