Bleeding at 34 Weeks
A 29-year-old G3P2 woman at 34 weeks presents to a zonal hospital with painless vaginal bleeding that started 2 hours ago; she soaked two pads. She has had one prior cesarean delivery. Vitals: BP 96/60 mmHg, HR 116/min, RR 22/min. Uterus is soft and non-tender; fetal heart rate is 148/min and reactive. Speculum examination is deferred. Hemoglobin is 9.8 g/dL; the hospital has no on-site blood bank, an ultrasound machine with a trained operator on call, and operating theatre capability. The referral center is 3 hours by road; an ambulance is available.
1. What is the leading diagnosis, and why is a digital vaginal examination contraindicated here?
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Placenta previa is the leading diagnosis: painless third-trimester bleeding, soft non-tender uterus, prior cesarean (a risk factor for previa and accreta), and stable fetal heart tracing.
Digital vaginal examination is contraindicated because it can provoke catastrophic hemorrhage by disrupting the placenta over the cervical os. The diagnosis is made by transvaginal ultrasound (safe and more accurate than transabdominal), which should be arranged promptly.
Differential to keep in mind: placental abruption (usually painful, tender, with fetal compromise), vasa previa (bleeding with fetal heart changes), and local causes (cervical lesions) - but the painless, soft-uterus picture points to previa.
Principle: in third-trimester bleeding, examine with ultrasound, not fingers.
2. She is hemodynamically borderline and the referral center is 3 hours away. How do you stabilize and decide on transfer versus delivery here?
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Stabilize and transfer, unless she deteriorates or goes into labor.
Stabilization:
- Two large-bore IV lines, crystalloid resuscitation, and cross-match; the absence of a blood bank is a major argument for transfer before she needs transfusion.
- Continuous fetal and maternal monitoring, left lateral tilt, oxygen as needed.
- Corticosteroids for fetal lung maturity (34 weeks - still within the window for benefit in many protocols) and anti-D immunoglobulin if she is Rh-negative.
- Tocolysis is generally avoided in active bleeding; do not mask deterioration.
Decision:
- Transfer to a facility with blood bank and neonatal intensive care if she is stable and not in active labor - the 3-hour road is acceptable only while stable.
- Deliver here if there is maternal instability, non-reassuring fetal status, or active labor - a cesarean may be needed and the theatre is available, but the lack of blood products makes this a last resort.
Document a clear plan and communicate with the receiving center before departure.
3. If ultrasound confirms placenta previa and she later requires cesarean delivery, what additional risk must the team plan for given her prior cesarean, and how does that change the setting?
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Placenta accreta spectrum - prior cesarean plus anterior previa markedly raises the risk of accreta, increta, or percreta.
Planning implications:
- Deliver in a facility with blood bank, experienced obstetric and surgical teams, and interventional radiology or gynecologic-oncology support - not a district hospital.
- Preoperative counseling for possible cesarean hysterectomy and massive transfusion; consent accordingly.
- Avoid attempting placental removal if accreta is suspected; leave the placenta and proceed to hysterectomy or planned conservative management per team protocol.
- Ultrasound/MRI to map placental invasion and plan incision away from the placenta.
- Multidisciplinary team present at delivery: anesthesia, obstetrics, surgery, blood bank, neonatology.
Principle: a prior cesarean turns "previa" into a potential surgical emergency; the delivery venue is part of the treatment.