Short note on phoenix sepsis score
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Phoenix sepsis criteria pediatric
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Phoenix sepsis score pediatric criteria scoring 2024
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https://pedemmorsels.com/pediatric-sepsis-definition-2024
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PMID: 38245897
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https://sccm.org/clinical-resources/sepsis-definitions
I now have enough information to write a comprehensive short note. Here it is:
Phoenix Sepsis Score
Background
Published in JAMA on January 21, 2024, the Phoenix Sepsis Score was developed by the Society of Critical Care Medicine (SCCM) Pediatric Sepsis Definition Task Force. It replaced the 2005 International Pediatric Sepsis Consensus Conference (IPSCC) criteria, which relied on SIRS (Systemic Inflammatory Response Syndrome) - a framework proven to have poor predictive properties in children.
The name has two inspirations: the mythical phoenix rising from ashes (representing a fresh start for pediatric sepsis definitions), and the fact that the 2024 SCCM Congress was held in Phoenix, Arizona.
The score was derived and validated across >3.6 million pediatric EHR encounters from 10 health systems across 5 countries (USA, Colombia, Bangladesh, China, Kenya) - Sanchez-Pinto et al., JAMA 2024.
Definition of Pediatric Sepsis (Phoenix)
Sepsis = Suspected or confirmed infection + Phoenix Sepsis Score ≥ 2 pointsSeptic Shock = Sepsis + ≥ 1 point in the Cardiovascular domain
The term "severe sepsis" is abolished - by definition, any sepsis under this framework represents life-threatening organ dysfunction.
Applies to: Children < 18 years
Does NOT apply to: Newborns during birth hospitalization, or neonates with post-conceptional age < 37 weeks.
The Phoenix Sepsis Score - Domains and Points
The score uses 4 organ systems, with a maximum of 12 points total.
1. Respiratory (0-3 points)
| Finding | Points |
|---|---|
| PaO2/FiO2 100-199 OR SpO2/FiO2 148-220 | 1 |
| PaO2/FiO2 < 100 OR SpO2/FiO2 < 148 | 2 |
| Mechanically ventilated (IMV) with any oxygenation impairment | +1 additional |
2. Cardiovascular (0-6 points)
Points are assigned for:
- Severe age-adjusted hypotension (1 pt)
- Multiple vasopressors (additional points)
- High lactate (≥5 mmol/L = 2 pts; 2-<5 mmol/L = 1 pt)
≥ 1 cardiovascular point = criteria met for septic shock (in the context of sepsis)
3. Coagulation (0-2 points)
| Finding | Points |
|---|---|
| Platelet count < 100 x10³/µL | 1 |
| INR > 1.3 | 1 |
| D-dimer > 2 mg/L fibrinogen equivalent units | 1 |
| Fibrinogen < 100 mg/dL | 1 |
| (Each finding is 1 point; max 2 points in this domain) |
4. Neurological (0-2 points)
| Finding | Points |
|---|---|
| GCS ≤ 10 | 1 |
| Fixed bilateral pupils (not drug-induced) | 1 |
Key rule: Unmeasured variables contribute 0 points - you do NOT need all variables to apply the score.
Performance and Mortality Correlation
The Phoenix Score correlates strongly with in-hospital mortality in children with suspected infection:
| Category | Mortality (Higher-resource) | Mortality (Lower-resource) |
|---|---|---|
| Suspected infection only | ~0.7% | ~3.6% |
| Phoenix Score ≥ 2 (Sepsis) | ~7.1% | ~28.5% |
| Septic Shock (+ CV points) | >10% | ~33% |
Children meeting Phoenix criteria for sepsis had 8 times the risk of in-hospital mortality compared to all children with suspected infection.
Key Differences from Previous Criteria (IPSCC 2005)
| Feature | IPSCC 2005 | Phoenix 2024 |
|---|---|---|
| Basis | SIRS criteria | Organ dysfunction |
| Organ systems | Multiple, complex | 4 (Respiratory, CV, Neuro, Coagulation) |
| Term "Severe Sepsis" | Used | Abolished |
| SIRS | Required | Not used |
| Data source | Expert consensus | >3.6 million EHR encounters, multicenter, multinational |
| Septic shock definition | Circulatory failure | Sepsis + ≥1 CV point |
Important Caveats
- The Phoenix Score is a classification tool, not an early screening tool. It should only be applied after you have already identified suspected or confirmed infection.
- SIRS-based criteria still play a role in early recognition and screening for children with impending organ dysfunction - relying solely on Phoenix may delay treatment in early-stage illness.
- Clinical documentation, billing, and coding systems may still lag behind the new definitions.
- Children with sepsis scoring points only in the primary affected organ (e.g., respiratory points for a child with pneumonia) have lower mortality than those with remote organ involvement.
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