A 35-year-old G3P2 woman currently 39 weeks pregnant presents to the emergency department with painful vaginal bleeding shortly after a motor vehicle accident in which she was a passenger. She had her seat belt on and reports that the airbag deployed immediately upon her car's impact against a tree. She admits that she actively smokes cigarettes. Her prenatal workup is unremarkable. Her previous pregnancies were remarkable for one episode of chorioamnionitis that resolved with antibiotics. Her temperature is 98.6°F (37°C), blood pressure is 90/60 mmHg, pulse is 130/min, and respirations are 20/min. The fetal pulse is 110/min. Her uterus is tender and firm. The remainder of her physical exam is unremarkable. What is the most likely diagnosis?
APlacental abruption
BEclampsia
CVasa previa
DPreterm labor
EPreeclampsia
A 27-year-old woman, gravida 2, para 1, at 37 weeks' gestation is admitted to the hospital in active labor. She has received routine prenatal care, but she has not been tested for group B streptococcal (GBS) colonization. Pregnancy and delivery of her first child were complicated by an infection with GBS that resulted in sepsis in the newborn. Current medications include folic acid and a multivitamin. Vital signs are within normal limits. The abdomen is nontender and contractions are felt every 4 minutes. There is clear amniotic fluid pooling in the vagina. The fetus is in a cephalic presentation. The fetal heart rate is 140/min. Which of the following is the most appropriate next step in management?
AObtain vaginal-rectal swab for nucleic acid amplification testing
BObtain vaginal-rectal swab for GBS culture
CAdminister intrapartum intravenous penicillin
DReassurance
EObtain vaginal-rectal swab for GBS culture and nucleic acid amplification testing
A 30-year-old woman, gravida 2, para 1, at 31 weeks' gestation is admitted to the hospital because her water broke one hour ago. Pregnancy has been complicated by iron deficiency anemia and hypothyroidism treated with iron supplements and L-thyroxine, respectively. The patient followed-up with her gynecologist on a regular basis throughout the pregnancy. Pregnancy and delivery of her first child were uncomplicated. Pulse is 90/min, respirations are 17/min, and blood pressure is 130/80 mm Hg. The abdomen is nontender. She has had 8 contractions within the last hour. Pelvic examination shows cervical dilation of 3 cm. The fetal heart rate is 140/min with no decelerations. In addition to administration of dexamethasone and terbutaline, which of the following is the most appropriate next step in the management of this patient?
AAdminister prophylactic azithromycin
BEmergency cesarean delivery
CAdministration of anti-RhD immunoglobulin
DCervical cerclage
EAdministration of magnesium sulfate
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