Treatment of Dengue Fever with Warning Signs or High-Risk Comorbidity: Reduced Perfusion and Raised Haematocrit
Dengue patients who present with warning signs, or who belong to a special high-risk population with comorbidities, represent a distinct and more urgent clinical group. When systolic pressure is still maintained but signs of reduced perfusion are present alongside a raised haematocrit, prompt protocol-guided management is required.
Clinical Situation
- Dengue with warning signs, or special/high-risk population (comorbidity present)
- Systolic pressure maintained — but signs of reduced perfusion are present
- Raised haematocrit
Patients fitting this profile are considered moderately ill and are classified as Group B, requiring closer observation and timely intervention.
Treatment Approach
Management involves prompt initiation of isotonic crystalloid fluid therapy, with the rate and duration subsequently adjusted in stages based on clinical response.
The complete stepwise titration schedule, monitoring criteria, and decision thresholds are in the full protocol below.
Treatment Goals
Clinical response is reassessed after the first hour. Key improvement markers include:
Blood pressure improved
Pulse pressure improved
Haematocrit decreased
Urine output improved
Capillary refilling improved
References
- The dengue patients with warning signs and high-risk groups are considered to be as moderately ill and classified as Group B.
- Includes dengue with warning signs or all special populations.
- Grade B with warning signs in adults (systolic pressure maintained + signs of reduced perfusion), HCT high.
- Isotonic fluid: 0.9% NS or RL are preferred.
- Start isotonic crystalloid 5–10 mL/kg/h for 1 h.
- Start fluid at 5–7 mL/kg/h for 1–2 h reducing to 3–5 mL/kg/h for 2–4 h and then reduce to 2–3 mL/kg/h or less according to the clinical response.
- IV crystalloid, reduce gradually 3–5 mL/kg/h for 2–4 h · 2–3 mL/kg/h for 2–4 h · 1.5 mL/kg/h for 2–4 h.
- Stop IV fluids at 24–48 h.
- Improvement: BP improved, pulse pressure improved, HCT decreased, urine output improved, capillary refilling.
- Adequate intravenous fluid volume may be required to maintain good perfusion and urine output of about 0.5 mL/kg/h.
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