Obstetric Nurse Test Obstetric Nurse Pharmacology in Obstetrics 4

Question 1

A patient with a penicillin allergy requires GBS prophylaxis in labor. Which antibiotic is the recommended first alternative?

Accepted Answer

Cefazolin

Answer

Cefazolin is the recommended first-line alternative for GBS prophylaxis in penicillin-allergic patients without high-risk allergy features because cross-reactivity is very low.

Question 2

Indomethacin (Indocin) is used as a tocolytic agent. Which fetal side effect limits its use beyond 32 weeks gestation?

Accepted Answer

Premature closure of the ductus arteriosus

Answer

Indomethacin, an NSAID, inhibits prostaglandin synthesis and can cause constriction of the fetal ductus arteriosus, leading to pulmonary hypertension.

Question 3

A postpartum patient is prescribed low-molecular-weight heparin (enoxaparin) for DVT prophylaxis. Which lab value does NOT require routine monitoring with LMWH, unlike unfractionated heparin?

Accepted Answer

aPTT

Answer

LMWH has a predictable pharmacokinetic profile and does not require routine aPTT monitoring, which is used to monitor unfractionated heparin therapy.

Question 4

Which medication is used to reverse the effects of opioid-induced neonatal respiratory depression at delivery?

Accepted Answer

Naloxone

Answer

Naloxone (Narcan) is an opioid antagonist that rapidly reverses neonatal respiratory depression caused by transplacental opioid transfer.

Question 5

A patient in active labor has an epidural with a continuous infusion. She develops sudden hypotension. What is the nurse's first intervention?

Accepted Answer

Turn patient to left lateral position and increase IV fluids

Answer

Left uterine displacement and IV fluid administration are the initial interventions to treat epidural-induced hypotension by improving venous return and cardiac output.

Obstetric Nurse Test Practice Test

Obstetric Nurse Test Practice Test

Obstetric Nurse Test Obstetric Nurse Pharmacology in Obstetrics 4