A 35-year-old man from Delhi presents on day 6 of fever with sudden onset of epigastric pain, vomiting, and restlessness. His temperature is 38.5°C, pulse 110/min, blood pressure 100/70 mmHg, and respiratory rate 22/min. Examination reveals hepatomegaly (3 cm below costal margin) and a petechial rash. Laboratory findings: WBC 3,200/μL, platelets 45,000/μL, haematocrit 42% (baseline 38%), and AST 320 U/L. Dengue serology is positive. What is the most appropriate immediate management?

Explanation

## Management of Dengue with Warning Signs and Early Plasma Leakage This patient has **dengue with warning signs progressing to severe dengue** with evidence of early plasma leakage. The cornerstone of management is **judicious fluid resuscitation**. ### Clinical Assessment of This Patient **Key Point:** The patient meets criteria for severe dengue: - **Warning signs:** Severe abdominal pain, vomiting, restlessness (lethargy/restlessness), hepatomegaly > 2 cm - **Plasma leakage:** Haematocrit rise from 38% to 42% (4% rise ≥ 20% of baseline indicates leakage) - **Thrombocytopenia:** 45,000/μL (< 100,000) - **Elevated transaminases:** AST 320 U/L (hepatic involvement) ### Fluid Management Algorithm ```mermaid flowchart TD A[Dengue with warning signs]:::outcome --> B{Evidence of plasma leakage?}:::decision B -->|Yes| C[Severe dengue]:::outcome C --> D{Shock present?}:::decision D -->|No| E[Maintenance + deficit replacement<br/>IV NS 5-10 mL/kg/hr<br/>Monitor vitals & Hct q4-6h]:::action D -->|Yes| F[Aggressive resuscitation<br/>IV NS 10-20 mL/kg/hr<br/>Target MAP restoration<br/>Consider colloids if ongoing leak]:::urgent E --> G[Reassess q4-6h<br/>Reduce rate if Hct stable<br/>Increase if Hct rising]:::action F --> H[Vasopressors if needed<br/>Platelet/FFP only if spontaneous bleeding]:::action ``` ### Fluid Resuscitation Strategy | Phase | Fluid Type | Rate | Monitoring | Goal | |-------|-----------|------|-----------|------| | **No shock** | Normal saline | 5–10 mL/kg/hr | Vitals, Hct q4–6h | Urine output > 0.5 mL/kg/hr, stable Hct | | **Shock** | Normal saline | 10–20 mL/kg/hr | Vitals q1–2h, Hct q2–4h | Restore BP, narrow pulse pressure, urine output | | **Ongoing leak** | Colloid (albumin 5%) | 10–20 mL/kg/hr | As above | Reduce crystalloid requirement | **High-Yield:** This patient has **no shock** (BP 100/70 mmHg is acceptable, pulse pressure 30 mmHg is not yet critically narrow). He requires **maintenance + deficit replacement** at **5–10 mL/kg/hr** with close monitoring. ### Why NOT Other Interventions? **Mnemonic:** **ABCD** of severe dengue management: - **A**void over-resuscitation (leads to pulmonary oedema, ARDS) - **B**lood products only if spontaneous bleeding (not prophylactically) - **C**lose monitoring of haematocrit and vital signs - **D**iuretics only if fluid overload develops **Clinical Pearl:** Platelet transfusion is indicated only if: - Spontaneous bleeding (not just thrombocytopenia) - Platelet count < 10,000/μL with bleeding risk - Planned invasive procedure with count < 50,000/μL This patient has petechiae (not spontaneous bleeding) and platelets 45,000/μL — transfusion is **not indicated**. **Warning:** Dexamethasone has **no role** in dengue management and may worsen outcomes by masking deterioration and increasing infection risk.