Obstetric Nurse Test Obstetric Nurse Pharmacology in Obstetrics 5

Question 1

A nurse is administering Rh immune globulin (RhoGAM) to an Rh-negative postpartum patient. Within what timeframe must it be given to be effective?

Accepted Answer

Within 72 hours of delivery

Answer

RhoGAM must be administered within 72 hours of delivery to prevent Rh sensitization by destroying fetal Rh-positive cells before the maternal immune system mounts a response.

Question 2

A laboring patient received IV morphine 8 mg 1 hour ago. She is now 10 cm and begins pushing. What is the nurse's priority concern regarding the neonate?

Accepted Answer

Neonatal respiratory depression at delivery

Answer

Morphine administered close to delivery crosses the placenta and can cause neonatal respiratory depression; naloxone and resuscitation equipment must be immediately available.

Question 3

Which medication is used prophylactically in a patient with a history of preeclampsia to reduce recurrence risk in the current pregnancy?

Accepted Answer

Low-dose aspirin (81 mg daily)

Answer

Low-dose aspirin started before 16 weeks gestation significantly reduces the risk of preeclampsia recurrence by inhibiting thromboxane A2-mediated platelet aggregation and vasoconstriction.

Question 4

A patient is receiving IV magnesium sulfate at 2 g/hr. She becomes confused and her deep tendon reflexes are absent. Serum magnesium is 10 mEq/L. What is the nurse's immediate action?

Accepted Answer

Stop the infusion and administer calcium gluconate 1 g IV

Answer

Loss of deep tendon reflexes and confusion indicate severe magnesium toxicity; the infusion must be stopped immediately and calcium gluconate administered as the antidote.

Question 5

Which class of medication is contraindicated in all trimesters of pregnancy due to risk of fetal renal dysgenesis and oligohydramnios?

Accepted Answer

ACE inhibitors

Answer

ACE inhibitors are absolutely contraindicated in pregnancy because they impair fetal renal perfusion, leading to renal dysgenesis, oligohydramnios, and fetal/neonatal death.

Obstetric Nurse Test Practice Test

Obstetric Nurse Test Practice Test

Obstetric Nurse Test Obstetric Nurse Pharmacology in Obstetrics 5