Here we go – full exam kit for **amniotic fluid, polyhydramnios & oligohydramnios**: * ✅ 15 **detailed case scenarios** * ✅ Differential diagnoses **+ differential case scenarios** * ✅ **25 hard case-based MCQs** in **one HTML+CSS+JS file** --- ## 🧠 15 Detailed Clinical Case Scenarios ### 1️⃣ GDM with Polyhydramnios A 30-year-old G2P1 at **31 weeks** with known **poorly controlled GDM** complains of abdominal tightness and breathlessness. * **Exam:** Fundal height = 35 weeks; difficult to palpate fetal parts; fetal heart well heard; AFI = **28 cm**, fetus appropriate for dates, no gross anomalies. * **Dx:** Mild–moderate **polyhydramnios** due to maternal diabetes. * **Key Management:** * Optimize glycemic control (diet, insulin). * Detailed anomaly scan + fetal echo. * Serial growth scans and AFI. * Plan delivery at 38–39 weeks if no complication. --- ### 2️⃣ Anencephaly with Severe Polyhydramnios 22-year-old primigravida at **28 weeks** presents with very rapid abdominal enlargement and dyspnea. * **Exam:** SFH = 34 weeks; fluid thrill; fetal parts hard to define. * **USG:** AFI = 36 cm; **anencephaly**, no other anomalies. * **Dx:** Severe polyhydramnios secondary to lethal CNS anomaly. * **Key Management:** * Counsel regarding **lethal prognosis**. * Option of pregnancy termination depending on gestation/law or expectant care. * Symptomatic: indomethacin (if <32 wks), therapeutic amnioreduction if severe maternal distress. --- ### 3️⃣ Duodenal Atresia and Polyhydramnios 26-year-old at **30 weeks** with increased SFH. * **USG:** AFI 30 cm; fetus with **“double bubble sign”**, no visible stomach emptying; estimated weight normal. * **Dx:** Polyhydramnios due to **duodenal atresia**. * **Key Management:** * Counsel about need for **neonatal surgery**. * Screen for associated anomalies (especially Down syndrome). * Steroids for lung maturity if early delivery anticipated. * Deliver in **tertiary center** with pediatric surgery. --- ### 4️⃣ TTTS – Acute Polyhydramnios Monochorionic diamniotic twin pregnancy at **26 weeks**. * Mother has sudden breathlessness, tense abdomen. * **USG:** One twin with very large bladder, excessive fluid (AFI for that sac > 30 cm); co-twin “stuck” with very low fluid. * **Dx:** **Twin–Twin Transfusion Syndrome** with polyhydramnios in recipient twin. * **Key Management:** * Refer for fetoscopic laser ablation of placental vascular anastomoses. * Consider serial amnioreduction if laser not available. * Intensive fetal monitoring. --- ### 5️⃣ Idiopathic Mild Polyhydramnios at Term 28-year-old at **38 weeks** with no comorbidities. * **USG:** AFI 25 cm; fetus normal, growth appropriate, no anomalies. * **Dx:** **Mild idiopathic polyhydramnios**. * **Key Management:** * Reassurance + fetal movement counting. * Weekly NST + AFI. * Plan **induction at 40 weeks**, controlled amniotomy (to avoid cord prolapse). * Active management of third stage (risk of PPH). --- ### 6️⃣ Polyhydramnios with Fetal Anemia 27-year-old non-immune pregnant woman at **29 weeks** with history of febrile illness earlier in pregnancy. * **USG:** AFI 31 cm; MCA Doppler shows high velocity (suggesting fetal anemia); hydrops changes. * **Dx:** Fetal anemia (e.g., parvovirus B19) with secondary polyhydramnios. * **Key Management:** * Detailed infection/alloimmunization workup. * Consider **intrauterine transfusion** if indicated. * High-risk surveillance. --- ### 7️⃣ Multipara with Malpresentation and Polyhydramnios 35-year-old G4P3 at **37 weeks** with “baby changing position frequently”. * **Exam:** Variable lie; fundal height > dates; AFI 27 cm; no structural anomaly. * **Dx:** Polyhydramnios with **unstable lie**. * **Key Management:** * Hospital admission near term. * Avoid AROM when head not engaged. * If persistent transverse/oblique → **caesarean**. * Prepare for PPH. --- ### 8️⃣ Early Severe Oligohydramnios – Renal Agenesis 24-year-old at **20 weeks** with decreased fetal movements. * **USG:** Almost **no fluid** (AFI ~1–2 cm), small thorax, absent fetal kidneys, non-visualized bladder, characteristic **Potter facies**. * **Dx:** Bilateral renal agenesis with severe oligohydramnios. * **Key Management:** * Explain uniformly **fatal prognosis** due to pulmonary hypoplasia. * Offer termination as per legal framework. * Genetic counseling for future pregnancy. --- ### 9️⃣ Oligohydramnios in Severe Pre-eclampsia + IUGR 28-year-old at **33 weeks** with headaches and pedal edema. BP 160/110, proteinuria +++. * **USG:** AFI 4 cm, EFW <10th centile, abnormal umbilical artery Doppler (high PI, maybe absent end-diastolic flow). * **Dx:** Oligohydramnios due to **uteroplacental insufficiency**. * **Key Management:** * Stabilize mother (MgSO₄ if severe, antihypertensives). * Steroids if <34 weeks. * Daily CTG; repeat Doppler. * If Doppler critical / CTG non-reassuring → **expedite delivery** (often caesarean). --- ### 🔟 Post-term Oligohydramnios 29-year-old at **41+5 weeks** with reduced fetal movements. * **USG:** AFI 3 cm; fetus appropriate for gestation; BPP borderline. * **Dx:** Post-term pregnancy with oligohydramnios. * **Key Management:** * Induce labor (e.g., prostaglandin/oxytocin if cervix favorable). * Continuous intrapartum CTG (risk of cord compression). * Low threshold for operative delivery if fetal distress. --- ### 1️⃣1️⃣ PROM with Oligohydramnios at 30 Weeks 26-year-old at **30 weeks** with sudden gush of fluid from vagina. * **Speculum:** Pooling of clear fluid; Nitrazine positive. * **USG:** AFI 3 cm; fetus normal. * **Dx:** Preterm PROM with oligohydramnios. * **Key Management:** * Admit; avoid vaginal exams. * Steroids for lung maturity; broad-spectrum antibiotics. * Daily temperature, maternal WBC, CRP for chorioamnionitis. * Delivery if chorioamnionitis, fetal distress, or after 34 weeks depending on policy. --- ### 1️⃣2️⃣ Drug-Induced Oligohydramnios (ACE Inhibitor) 32-year-old with chronic hypertension on **ACE inhibitor** continues drug in early pregnancy. At 30 weeks: decreased movements. * **USG:** AFI 4 cm; fetal kidneys small, echogenic; IUGR. * **Dx:** Drug-induced fetal renal dysfunction → oligohydramnios. * **Key Management:** * Stop ACE inhibitor immediately, switch to pregnancy-safe antihypertensive. * Counsel on fetal prognosis (depends on damage). * Close surveillance, Dopplers, plan delivery based on fetal condition. --- ### 1️⃣3️⃣ Chronic Oligohydramnios without Anomaly 24-year-old at **32 weeks**, symphysiofundal height less than dates. * **USG:** AFI 5 cm; EFW borderline low; no structural anomaly; Doppler mildly increased resistance but not critical. * **Dx:** Chronic oligohydramnios with borderline growth – likely placental insufficiency. * **Key Management:** * Maternal left-lateral rest + hydration. * Frequent CTG, weekly Doppler, AFI. * Plan delivery at 37–38 weeks or earlier if Doppler worsens. --- ### 1️⃣4️⃣ Borderline AFI – Reversible with Hydration 20-year-old primigravida at **30 weeks** with decreased fetal movements. * **USG:** AFI 7 cm (borderline low); fetus normal; NST reactive. * Re-scan after **48 hrs of good oral and IV hydration** → AFI improves to 10 cm. * **Dx:** Functional/relative oligohydramnios. * **Key Management:** * Advise adequate oral fluids (2.5–3 L/day). * Reassurance + kick-count chart. * Periodic AFI monitoring. --- ### 1️⃣5️⃣ Intrapartum Oligohydramnios with Variable Decelerations At **39 weeks** in active labor, CTG shows **recurrent variable decelerations** with every contraction. Vaginal exam: membranes ruptured earlier, thick meconium, minimal forewaters. * **USG intra-labor:** Very low fluid. * **Dx:** Cord compression due to oligohydramnios in labor. * **Key Management:** * **Intrapartum amnioinfusion** via IUPC. * If decelerations persist → expedite delivery (instrumental/LSCS). * Continuous fetal monitoring. --- ## 🔍 Differential Diagnoses & Differential Case Scenarios ### A. Differentials for “Large-for-Dates” with Suspected Polyhydramnios 1. **Multiple pregnancy** 2. **Fetal macrosomia** (e.g., GDM) with normal AFI 3. **Uterine fibroids** 4. **Full bladder / pelvic mass / ovarian tumor** 5. **Ascites** (maternal or fetal) 6. **Molar pregnancy** (especially early, with very large uterus) #### Sample Differential Case A 28-year-old at 30 weeks has SFH = 34 weeks. * Case 1: USG shows **two fetuses**, normal AFI each → **Twins**, not polyhydramnios. * Case 2: USG shows single fetus, EFW >97th centile, AFI 13 cm → **Macrosomia**, AF normal. * Case 3: USG shows single fetus and AFI 30 cm → true **polyhydramnios**. --- ### B. Differentials for “Small-for-Dates” with Suspected Oligohydramnios 1. **IUGR with normal AFI** (constitutional small baby) 2. Wrong dating (late booking, irregular cycles) 3. Fetal demise (no movements, no heart sounds) 4. Oligohydramnios due to: * PROM * Renal agenesis * Placental insufficiency (pre-eclampsia, chronic HTN) * Drugs (ACE-I, NSAIDs) #### Sample Differential Case A 23-year-old at “32 weeks by LMP” has SFH 28 cm. * Case A: USG dating shows 28 weeks, AFI 12 cm, EFW appropriate → **Wrong dates**. * Case B: USG shows 32 weeks, AFI 4 cm, EFW <10th centile → **IUGR with oligohydramnios**. * Case C: USG shows 32 weeks, AFI 11 cm, EFW <10th centile → **IUGR with normal AFI** (better prognosis than B). --- ### C. Differentials for “Leaking Fluid Per Vaginum” 1. **PROM / PPROM** – clear fluid, pooling, ferning, Nitrazine positive 2. **Normal vaginal discharge** – mucoid, not watery, tests negative 3. **Stress urinary incontinence** – leak with cough/sneeze, smell of urine 4. **Sweat** / local hygiene issues #### Sample Differential Case Patient at 34 weeks with “wet underwear”: * Speculum: No pooling, Nitrazine negative → probable **physiologic discharge**. * Speculum: Pooling of clear fluid, positive ferning & Nitrazine → **PROM**. --- ### D. Differentiating Polyhydramnios vs Ascites * **Polyhydramnios:** Fetal parts hard to palpate, fluid within uterus, fetal heart well heard over uterus, USG: increased **AFI**. * **Ascites (maternal):** Shifting dullness, uterus may be of normal size inside; AFI may be normal. #### Sample Case Pregnant woman with distended abdomen and breathlessness – **USG** differentiates: * Case 1: Massive ascites, normal AFI → liver pathology. * Case 2: Huge AFI, fetus “floating” → **polyhydramnios**. --- ### E. Differential for Variable Decelerations in Labor 1. **Cord compression due to oligohydramnios** 2. True **nuchal cord** 3. Cord prolapse 4. Uterine hypertonus with compression Amnioinfusion helps if **oligohydramnios** is the culprit. --- ## 🧾 25 Case-Based MCQs – Single HTML + CSS + JS File You can **copy–paste** this as (for example) `amniotic_fluid_mcq.html` and open in browser. ```html