A 32-year-old multigravida (G3P2L2) attends her antenatal clinic at 24 weeks of gestation. She has no significant past medical history. On routine examination, her blood pressure is 138/88 mmHg (baseline BP at 14 weeks was 110/70 mmHg). Urine dipstick shows 1+ proteinuria. Fasting blood glucose is 105 mg/dL and 2-hour post-75 g OGTT is 165 mg/dL. Which of the following is the most appropriate next step in the management of this patient according to the NRHM antenatal care guidelines?

Explanation

## Second Trimester Antenatal Care — GDM Diagnosis & Hypertension Monitoring ### Clinical Interpretation of Findings at 24 Weeks **Key Point:** At 24 weeks, the patient meets diagnostic criteria for gestational diabetes mellitus (GDM) based on the 75 g oral glucose tolerance test (OGTT), and shows early signs of gestational hypertension that require monitoring but do not yet meet preeclampsia criteria. ### GDM Diagnosis — WHO Criteria (2013) | Parameter | Value | Interpretation | |-----------|-------|----------------| | **Fasting glucose** | ≥92 mg/dL | Abnormal | | **1-hour post-75 g glucose** | ≥180 mg/dL | Abnormal | | **2-hour post-75 g glucose** | ≥153 mg/dL | Abnormal | | **Patient's 2-hour value** | 165 mg/dL | **DIAGNOSTIC** | **High-Yield:** A single abnormal value on the 75 g OGTT is sufficient to diagnose GDM in the WHO 2013 criteria (adopted by NRHM). The patient's 2-hour value of 165 mg/dL exceeds the threshold of 153 mg/dL. ### Hypertension Assessment **Clinical Pearl:** The patient shows a rise in BP from baseline (110/70 → 138/88 mmHg) with 1+ proteinuria. This suggests **gestational hypertension** (elevated BP without proteinuria) or **early preeclampsia** (elevated BP + proteinuria). However: - **Preeclampsia diagnosis** requires BP ≥140/90 mmHg (or ≥160/110 for severe) AND proteinuria ≥0.3 g/24 h (or 1+ on dipstick in context of symptoms). - Current BP is 138/88 mmHg (borderline). - Proteinuria is 1+ (mild) — requires quantification via 24-hour urine or protein:creatinine ratio to confirm preeclampsia. - **No symptoms of severe preeclampsia** (headache, epigastric pain, visual disturbance) are mentioned. ### Appropriate Management (NRHM Guidelines) 1. **Diagnose GDM** → Refer to dietitian for medical nutrition therapy (MNT). 2. **Initiate glucose self-monitoring** (fasting and postprandial). 3. **Monitor blood pressure** at each visit (currently gestational hypertension; not yet preeclampsia). 4. **Repeat urine examination** to assess proteinuria trend. 5. **Consider 24-hour urinary protein** if proteinuria persists or worsens (to confirm preeclampsia). 6. **Antihypertensive therapy** is NOT indicated at BP 138/88 mmHg without confirmed preeclampsia; only if BP ≥160/110 mmHg (severe) or if preeclampsia is confirmed. **Mnemonic: GDM Management — DIET-M** - **D**ietary counseling (first-line) - **I**nsulin (if diet fails to achieve targets) - **E**xercise & education - **T**esting (self-monitoring of blood glucose) - **M**onitoring (maternal & fetal) ### Why Insulin Is NOT Started Immediately Insulin is indicated only if: - Dietary management fails to achieve glycemic targets (fasting <95 mg/dL, 2-hour postprandial <120 mg/dL). - Patient is diagnosed with pregestational diabetes or has severe hyperglycemia. First-line therapy for GDM is always **medical nutrition therapy (MNT)** with glucose monitoring. [cite:Park 26e Ch 10; NRHM Guidelines on Antenatal Care]