Clinical Scenario Analysis
This child presents with acute chest syndrome (ACS) — a life-threatening complication of sickle cell disease characterized by:
Management of Acute Chest Syndrome
Key Point
ACS is a medical emergency requiring immediate empiric antibiotics, oxygen, and supportive care, with exchange transfusion reserved for severe hypoxemia or clinical deterioration.
Rationale for Correct Answer
- 1.
Empiric antibiotics are mandatory — ACS is often triggered by infection (bacterial or viral pneumonia). Common pathogens include Streptococcus pneumoniae, Haemophilus influenzae, and atypical organisms (Mycoplasma, Chlamydia).
- 2.
Ceftriaxone + vancomycin covers typical respiratory pathogens in the sickle cell population.
- 3.
Exchange transfusion is indicated if SpO₂ <90% despite supplemental oxygen, to reduce HbS percentage and improve oxygen delivery.
- 4.
Time-sensitive intervention — delays in antibiotics increase mortality risk.
Supportive Management (Concurrent)
| Intervention | Rationale |
|---|
| High-flow oxygen | Maintain SpO₂ >94%; reduce sickling |
| IV hydration | Avoid dehydration; maintain renal perfusion |
| Analgesia | Manage pain; facilitate breathing and mobilization |
| Incentive spirometry | Prevent atelectasis |
| Blood cultures | Identify organism; guide antibiotic de-escalation |
High-YieldNEET PG
Exchange transfusion is NOT first-line but is triggered by:
Why Exchange Transfusion?
Exchange transfusion reduces HbS% (goal <30%), improving rheology and oxygen delivery. It is a bridge therapy, not definitive treatment.
