A nurse is caring for a client who is at 30 weeks of gestation and is receiving magnesium sulfate for preeclampsia. The nurse should recognize which of the following manifestations as an adverse reaction to the medication?

Choice A rationale:
Placing the client in a Trendelenburg position (head down and feet up) is not recommended after a convulsion in a pregnant client. It could potentially compromise blood flow to the brain and fetus. The priority after a convulsion is to ensure the client's airway and oxygenation.

Choice B rationale:
Assisting the client to void might be necessary during the course of care but is not the immediate action needed after a convulsion. The priority is to address airway and oxygenation needs.

Choice C rationale:
Administering oxygen to the client via face mask at 10 L/min is the correct action after the client experiences a convulsion. Eclampsia is a severe complication of preeclampsia, characterized by seizures. Providing oxygen ensures adequate oxygenation to the brain and vital organs during and after the convulsion.

Choice D rationale:
Giving calcium gluconate is not the appropriate action for eclampsia. Calcium gluconate is used to treat hyperkalemia and calcium channel blocker overdose. It does not address the underlying issue of eclampsia or prevent further convulsions. The immediate focus should be on managing the convulsions and ensuring the client's safety and well-being.

Choice A rationale:
The incompetent cervix is not related to the client's current situation. An incompetent cervix refers to a weakened cervix that may result in premature dilation during pregnancy, leading to potential pregnancy loss or preterm birth. It is not relevant to the client's current stage of labour and cervical dilation.

Choice B rationale:
Postpartum haemorrhage is the correct condition to be concerned about in this situation. The client is 80% effaced and 8 cm dilated, which indicates she is in active labour. These signs of progress indicate that she is at risk for excessive bleeding after delivery, which is known as postpartum haemorrhage.

Choice C rationale:
An ectopic pregnancy occurs when a fertilized egg implants outside the uterus, typically in the fallopian tube. This condition is not related to the client's current presentation, as she is already in active labour.

Choice D rationale:
Hyperemesis gravidarum is severe and persistent nausea and vomiting during pregnancy, usually during the first trimester. This condition is not relevant to the client's current situation, which involves active labour and cervical dilation.