A 3-year-old girl from an urban slum in Mumbai is referred to the nutrition rehabilitation centre (NRC) with severe acute malnutrition (SAM) and clinical signs of kwashiorkor. The ICDS team needs to confirm the diagnosis and assess the severity of protein deficiency. Which investigation is most appropriate to guide initial management?

Explanation

## Biochemical Assessment of Kwashiorkor in NRC Settings ### Why Serum Albumin and Total Serum Protein Are Indicated **Key Point:** In a child with clinical kwashiorkor (edema, skin changes, hepatomegaly), serum albumin and total serum protein are the investigations of choice to confirm protein malnutrition and guide nutritional rehabilitation. **High-Yield:** These markers: - **Confirm hypoproteinemia** — the hallmark of kwashiorkor - **Guide feeding protocols** — albumin < 2.5 g/dL indicates severe protein deficiency requiring cautious refeeding - **Monitor response to therapy** — serial measurements track recovery during NRC admission - **Assess organ dysfunction** — low albumin reflects hepatic synthetic dysfunction and increased infection risk ### Biochemical Profile in Kwashiorkor | Parameter | Kwashiorkor | Marasmus | Significance | | --- | --- | --- | --- | | Serum Albumin | ↓↓ (< 2.5 g/dL) | Relatively preserved | Protein deficiency marker | | Total Serum Protein | ↓ (< 5.5 g/dL) | Mildly ↓ | Reflects visceral protein status | | Hemoglobin | Often low | Low | Anemia common in both | | Blood glucose | May be low | Low | Risk of hypoglycemia | | Electrolytes | Abnormal (K^+^, Mg^2+^) | Abnormal | Refeeding syndrome risk | **Clinical Pearl:** Serum albumin has a 2–3 week half-life, so it reflects recent protein intake and is ideal for monitoring NRC response. Prealbumin (half-life 2–3 days) is more sensitive for acute changes but is not routinely available in Indian NRC settings. ### Role in NRC Management **Key Point:** Albumin level directly influences: 1. **Feeding strategy** — albumin < 2.5 g/dL requires phase-wise refeeding to prevent refeeding syndrome 2. **Antibiotic selection** — hypoproteinemia affects drug distribution and dosing 3. **Infection risk assessment** — low albumin increases susceptibility to secondary infections 4. **Discharge readiness** — albumin > 3.0 g/dL is a criterion for home-based follow-up **Mnemonic:** **KWASH** = **K**eep **W**atch on **A**lbumin, **S**erum protein, **H**epatic function.