Correlate the following clinical descriptions of late-pregnancy obstetric emergencies with their corresponding anatomical or pathophysiological etiology.
- Sudden-onset, painful dark red vaginal bleeding with a hypertonic, tender uterus in a patient with severe chronic hypertension.Premature separation of the placenta from the uterine decidua.
- Painless, bright red vaginal bleeding noted shortly after sexual intercourse in a patient with a history of two prior cesarean deliveries.Implantation of placental tissue extending over the internal cervical os.
- Acute vaginal bleeding accompanied by a rapid drop in fetal heart rate to 80/min occurring immediately following artificial rupture of membranes.Fetal blood vessels traversing the amniotic membranes unprotected by Wharton jelly.
- Sudden, tearing abdominal pain with an abrupt cessation of previously regular uterine contractions and a palpable fetal part in the maternal abdomen.Complete, full-thickness disruption of the uterine wall.
Answer
The correct correlations link painful bleeding with hypertonia to premature placental separation (abruption); painless postcoital bleeding to placental implantation over the cervical os (previa); bleeding with fetal bradycardia after membrane rupture to unprotected fetal vessels (vasa previa); and tearing pain with contraction cessation to full-thickness uterine disruption (rupture).
Each clinical vignette provides the classic hallmark features of a specific obstetric emergency. Recognizing whether the bleeding is painful or painless, evaluating the timing of fetal distress relative to membrane rupture, and assessing uterine tone are critical diagnostic steps for distinguishing between these third-trimester and intrapartum complications.
Step-by-Step Solution
Key Concept
Differentiating etiologies of third-trimester bleeding and intrapartum emergencies based on maternal and fetal clinical signs.