A 28-year-old man from Delhi presents on day 7 of fever with platelet count 80,000/μL, hematocrit 48%, and complains of abdominal pain and persistent vomiting. He is alert but restless. What is the most appropriate immediate next step?

Explanation

## Clinical Presentation: Dengue with Warning Signs This patient has: - **Fever day 7** (critical phase) - **Thrombocytopenia** (80,000/μL) — warning sign - **Hemoconcentration** (hematocrit 48%) — plasma leakage - **Abdominal pain + persistent vomiting** — warning signs - **Restlessness** — early sign of hypovolemia/shock **Key Point:** The presence of ANY warning sign mandates hospital admission and IV fluid therapy. This patient is entering or in the critical phase. ## WHO Warning Signs in Dengue | Warning Sign | Pathophysiology | |---|---| | Persistent vomiting | Plasma leakage, GI involvement | | Severe abdominal pain | Hepatomegaly, peritoneal effusion | | Bleeding (petechiae, gum bleed, hematemesis) | Thrombocytopenia + endothelial dysfunction | | Lethargy or restlessness | Hypovolemia, shock | | Hepatomegaly > 2 cm | Liver involvement | | Rapid fall in platelet count | Severe plasma leakage | | Hematocrit rise > 20% | Active plasma leakage | ## Management of Dengue with Warning Signs **High-Yield:** IV fluid resuscitation is the cornerstone of management in the critical phase. ### Fluid Resuscitation Protocol 1. **Establish IV access** (two large-bore cannulae if possible) 2. **Isotonic crystalloid** (0.9% saline or Ringer's lactate) at **5–7 mL/kg/hour** 3. **Monitor hourly:** - Vital signs (HR, BP, RR) - Urine output (target ≥ 0.5 mL/kg/hour) - Hematocrit (repeat every 6–12 hours) - Platelet count 4. **Adjust fluid rate** based on clinical response: - If improving: reduce to 3–5 mL/kg/hour - If deteriorating: increase to 10 mL/kg/hour or consider colloids **Clinical Pearl:** Restlessness is an early sign of inadequate perfusion and hypovolemic shock. Aggressive fluid resuscitation must begin immediately to prevent progression to dengue shock syndrome (DSS). ## Why This Patient Needs Hospital Admission - Multiple warning signs present - Risk of rapid progression to shock - Requires hourly monitoring and titrated IV fluids - Potential need for transfusion if bleeding develops