A 35-year-old man from Delhi presents on day 5 of fever with sudden onset of severe epigastric pain, persistent vomiting, and lethargy. Vital signs: temperature 38.2°C, pulse 112/min (weak), blood pressure 98/65 mmHg, respiratory rate 24/min. Skin is warm and flushed. Laboratory: platelet count 28,000/μL, haematocrit 52% (baseline 42%), AST 580 U/L, ALT 240 U/L, albumin 2.8 g/dL. Chest X-ray shows bilateral pleural effusions. What is the most appropriate immediate management?

Explanation

## Management of Dengue Shock Syndrome (DSS) ### Clinical Diagnosis: Dengue Shock Syndrome (Grade III–IV DHF) **Key Point:** This patient has: - **Fever + haemorrhagic manifestations:** Severe abdominal pain, vomiting, lethargy (spontaneous bleeding/plasma leakage) - **Thrombocytopenia:** 28,000/μL - **Plasma leakage:** Haematocrit 52% (elevated from baseline 42%), bilateral pleural effusions, low albumin (2.8 g/dL) - **Circulatory failure:** Weak pulse, BP 98/65 mmHg, tachycardia (112/min), tachypnoea (24/min) — signs of **shock** This is **Dengue Shock Syndrome** (Grade III–IV DHF). ### Management Algorithm for DSS ```mermaid flowchart TD A[Dengue Shock Syndrome diagnosed]:::outcome --> B[Establish IV access]:::action B --> C[Fluid resuscitation: Isotonic crystalloid]:::action C --> D{Haemodynamic response?}:::decision D -->|Improved: BP stable, urine output adequate| E[Continue maintenance fluids]:::action D -->|No response after 1-2L bolus| F[Reassess: ongoing plasma leakage?]:::decision F -->|Yes| G[Increase fluid rate; consider colloid]:::action F -->|No| H[Prepare for transfusion if bleeding]:::action G --> I{Persistent shock?}:::decision I -->|Yes| J[Vasopressor support: dopamine/noradrenaline]:::urgent I -->|No| E H --> K[Monitor platelet count, Hct, urine output]:::action J --> K ``` ### Immediate Management Steps **High-Yield:** The cornerstone of DSS management is **aggressive fluid resuscitation** with isotonic crystalloid (normal saline or Ringer's lactate): 1. **Establish IV access:** Two large-bore cannulae 2. **Fluid bolus:** 10–20 mL/kg isotonic crystalloid over 15–30 minutes 3. **Reassess:** Check BP, pulse, urine output, mental status 4. **If improved:** Continue maintenance fluids (avoid over-resuscitation; risk of pulmonary oedema) 5. **If no response:** Consider colloid (FFP, albumin) or vasopressor support (dopamine, noradrenaline) 6. **Transfusion:** Only if active bleeding or Hct continues to rise despite fluids **Clinical Pearl:** The critical phase of dengue (days 3–7) is when plasma leakage peaks and shock develops. Fluid resuscitation must be titrated carefully to avoid both hypovolaemic shock and fluid overload (pulmonary oedema, pleural effusion worsening). **Mnemonic:** **FLUID FIRST** in DSS - **F**luids: isotonic crystalloid, 10–20 mL/kg bolus - **L**aboratory: monitor Hct, platelets, albumin, electrolytes - **U**rine output: target ≥0.5 mL/kg/hr - **I**V access: two large-bore cannulae - **D**opamine/vasopressors: only if shock persists after fluids ### Why Option 1 (Oral Rehydration) is Dangerous This patient is in shock (hypotensive, tachycardic, altered mental status) and cannot tolerate oral intake. Oral rehydration is inadequate and delays critical IV therapy. ### Why Option 3 (Immediate Transfusion) is Premature There is no evidence of active bleeding (no haematemesis, melaena, or severe spontaneous bleeding). Transfusion is reserved for patients with ongoing bleeding or Hct that continues to rise despite adequate fluid resuscitation. Unnecessary transfusion increases the risk of volume overload. ### Why Option 4 (Antibiotics + Steroids) is Incorrect Dengue is viral; antibiotics are not indicated unless secondary bacterial infection is suspected. Corticosteroids have no proven benefit in dengue and may increase the risk of secondary infection.