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OG8.1-10 | Antenatal Care — PBL Case

CLINICAL SETTING

Meena, a 35-year-old woman from a rural area, arrives at the district hospital outpatient department for the first time in her pregnancy at 34 weeks of gestation. She is accompanied by her mother-in-law. Meena has had two previous caesarean sections — the first for foetal distress at term 5 years ago, and the second for the same indication 3 years ago. She has had no antenatal care in this pregnancy, citing distance from the health centre and family obligations. She complains of feeling 'weak and breathless' for the past two weeks. On first examination by the intern: height 152 cm, weight 61 kg, BP 152/98 mmHg, pulse 96 bpm, respiratory rate 20/min. She appears pale. Her abdomen shows a gravid uterus with the fundus palpable at 33 cm from the symphysis pubis. The baby is in cephalic presentation. There is 2+ pedal oedema. She reports that her baby is moving less than usual over the past 48 hours.

Trigger 1: Trigger 1 — First Encounter: Registering the Red Flags

The intern records the history and examination findings and calls the registrar. The registrar reviews the case: Meena is G3P2 with two previous LSCS scars. She has had no ANC, no investigations, and no vaccinations in this pregnancy. The registrar notices: BP 152/98 mmHg on two readings taken 10 minutes apart; pallor; reduced fetal movements for 48 hours; pedal oedema 2+; and a fundal height of 33 cm at 34 weeks. The uterus feels tense on abdominal palpation. Fetal heart rate auscultated at 148 beats/min.

DISCUSSION POINTS

  • Which findings in Meena's presentation represent immediate high-risk red flags, and how would you prioritise them using the inverted pyramid of care?
  • What is the significance of having two previous LSCS scars in the context of an unregistered pregnancy presenting at 34 weeks? What complications are you already thinking about?
  • The intern did not measure Meena's BP until her first visit. What does this case illustrate about the consequences of delayed entry into antenatal care and the inverted pyramid of care principle?
Click to reveal Trigger 2: Trigger 2 — Investigation Results (discuss previous trigger first!)

Trigger 2: Trigger 2 — Investigation Results

Urgent investigations are sent. Results: Haemoglobin 8.2 g/dL, MCV 72 fL, platelets 1,86,000/µL, serum creatinine 0.9 mg/dL, urine dipstick 2+ protein, random blood glucose (non-fasting, 2-hour DIPSI) 162 mg/dL. Ultrasound report (done 30 minutes later): live singleton, cephalic, estimated fetal weight 2.1 kg (below 10th centile for 34 weeks), placenta posterior grade II, amniotic fluid index 9 cm, non-reactive NST. The ultrasound also shows a lower uterine segment thickness of 1.6 mm at the previous LSCS scar site.

DISCUSSION POINTS

  • Using the DIPSI protocol result and the definition you know, does Meena have GDM? Explain your reasoning and state the protocol cut-off you are applying.
  • The fetus is below the 10th centile with a non-reactive NST. Construct a differential diagnosis for this finding, and propose the next steps in fetal surveillance — specifically, what does a complete biophysical profile assess and what score would prompt you to recommend delivery?
  • The lower uterine segment thickness is 1.6 mm on a scan at 34 weeks. What is the clinical significance of this finding in a woman with two previous LSCS scars who is considering any form of labour?
Click to reveal Trigger 3: Trigger 3 — The Blood Pressure Escalates (discuss previous trigger first!)

Trigger 3: Trigger 3 — The Blood Pressure Escalates

Two hours into admission, Meena's blood pressure is re-checked: 168/112 mmHg. She develops a severe frontal headache and reports seeing 'flashing lights'. The senior resident is called. The resident reviews the urine protein (2+, confirmed on repeat dipstick), the haemogram (no thrombocytopaenia; platelets 1,86,000), and the LFTs (now returned: ALT 48 U/L, AST 52 U/L — mildly elevated). The clinical diagnosis is severe-feature pre-eclampsia.

DISCUSSION POINTS

  • Define the BP threshold that constitutes severe features in pre-eclampsia. Name the two first-line antihypertensive agents that can be used to acutely lower BP in this situation and state which is contraindicated and why.
  • The senior resident wants to start MgSO4. Describe the Zuspan intravenous regimen (loading dose and maintenance infusion) and list the three clinical parameters you must monitor continuously once MgSO4 is running. What is the antidote if toxicity occurs?
  • Meena has two previous LSCS scars and a LUS thickness of 1.6 mm. She now has severe pre-eclampsia. How does this combination of factors influence the decision between an emergency caesarean section and conservative management?
Click to reveal Trigger 4: Trigger 4 — After Delivery (discuss previous trigger first!)

Trigger 4: Trigger 4 — After Delivery

Meena undergoes an emergency lower-segment caesarean section under spinal anaesthesia. The intraoperative finding is a thin, translucent lower uterine segment scar — near-complete dehiscence without rupture. A live female infant is delivered weighing 1.98 kg; APGAR scores 7 at 1 minute, 9 at 5 minutes. The baby is transferred to the NICU. Postoperatively, Meena's BP stabilises on oral nifedipine. She is counselled about breastfeeding, contraception, and future pregnancies. She asks: 'Will I ever be able to have another baby normally?' Her mother-in-law adds: 'We want to know if the next baby will be a boy.'

DISCUSSION POINTS

  • What is the appropriate counselling for Meena regarding future pregnancies given that she now has three caesarean sections and a documented near-dehiscence? Discuss TOLAC eligibility and the evidence base for or against offering a trial of labour.
  • How do you respond to the mother-in-law's question about sex determination? Identify the legislation that governs your response and explain its rationale. What are the consequences of complying with such a request?
  • Meena received no TT vaccination in this pregnancy. What are the implications for her neonate — and for Meena herself — in terms of neonatal tetanus risk? How would you address this in the post-delivery period?
Click to reveal Trigger 5: Trigger 5 — Systems Reflection (discuss previous trigger first!)

Trigger 5: Trigger 5 — Systems Reflection

During a team debrief, the obstetric team reflects on Meena's case. The questions are: Why did Meena not access ANC earlier? What barriers existed (geographic, cultural, economic, health-system)? What would a functioning 'inverted pyramid of care' have looked like for Meena in an ideal system? The team is asked to identify, at a systems level, the missed opportunities that allowed this high-risk woman to present undetected at 34 weeks.

DISCUSSION POINTS

  • Identify at least four system-level factors (not individual patient choices) that contributed to Meena's delayed presentation. For each, suggest a practical intervention at the primary health centre or community level.
  • If Meena had been registered at 10 weeks and followed a standard ANC schedule, which visits or investigations would most likely have detected her hypertension, anaemia, and GDM earlier — and what management would have been initiated at that point?
  • Reflect on the role of the healthcare provider in non-judgmental communication when a woman presents late for ANC. What specific communication strategies would you use in the first clinical encounter with Meena to build trust and ensure adherence to the remaining pregnancy management plan?

Group Task Assignments

  • Map all risk factors identified in Meena's case to the specific ANC competencies (OG8.1–OG8.10) they relate to, and discuss which early ANC visit would have first detected each.
  • Construct a complete management timeline for Meena from her first presentation at 34 weeks: immediate priorities → investigations → treatment → delivery → post-delivery care. Present as a structured table with time-stamps.
  • Debate: 'In a resource-limited rural setting, is the DIPSI protocol more practical than IADPSG for GDM screening?' Each group member takes a position and defends it with evidence from the case and standard references.
  • Role-play the counselling conversation with Meena (or a family member) at the post-delivery visit, addressing: future pregnancy safety, contraception options, breastfeeding while on antihypertensives, and the PCPNDT response.

Learning Issues

Research these questions and bring your findings to the discussion.

  1. [OG8.1] What are the specific high-risk features in this case, and which level of care does the inverted pyramid of care direct her to?
  2. [OG8.3] How does fundal height measurement and abdominal examination change management decisions in a woman with suspected fetal growth restriction?
  3. [OG8.4] What is the clinical significance of a non-reactive NST in the context of a small-for-gestational-age fetus at 34 weeks, and what is the BPP scoring system?
  4. [OG8.5] What is the clinical significance of a lower uterine segment thickness of 1.6 mm in a woman with two previous caesarean sections, and how does it affect delivery planning?
  5. [OG8.7] What is the consequence of no TT vaccination in this pregnancy for the neonate, and what is the corrective action postpartum?
  6. [OG8.8] What investigations are mandated at first presentation and why — and how does delayed presentation change the investigation priorities?
  7. [OG8.9] How is a small-for-gestational-age fetus with a non-reactive NST evaluated, and what are the causes of antepartum fetal growth restriction?
  8. [OG8.10] What is the evidence base for and against TOLAC in a woman with two previous lower-segment caesarean scars and a documented near-dehiscence?