🧠 Pediatric NEXUS II Head CT Instrument
UseWhen to use: children after blunt head trauma when choosing CT vs observation.
StrataZero criteria → CT often deferrable; any criterion → not ruled out.
LimitsWhen not to use: instead of PECARN where that is local standard. · Pitfall: ignoring mechanism or infant-specific cues. · Neurosurgical red flags override any score.
SourcePediatric NEXUS II head CT decision instrument literature
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
Paste the link in Slack, Teams, X, or LinkedIn — the preview image comes from this page’s Open Graph card.
Methodology · worked example, guidelines & full notes
Seven criteria.
When to use
When to use: children after blunt head trauma when choosing CT vs observation.
How it works
Low risk only if NONE of: skull fracture, altered alertness, neuro deficit, persistent vomiting, scalp hematoma, abnormal behavior, coagulopathy.
Key points
- Seven criteria.
- Zero = low-risk cue.
- Next: PECARN / observation.
References
- Pediatric NEXUS II head CT decision instrument literature
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Evidence of significant skull fracture | No |
|---|---|
| Altered level of alertness | No |
| Neurologic deficit | No |
| Persistent vomiting | No |
| Scalp hematoma | No |
| Abnormal behavior | No |
| Coagulopathy | No |
→Ped NEXUS IINo high-risk criteria
- Cue：Instrument suggests very low risk — CT often deferrable if otherwise well
| Evidence of significant skull fracture | Yes |
|---|---|
| Altered level of alertness | Yes |
| Neurologic deficit | Yes |
| Persistent vomiting | Yes |
| Scalp hematoma | Yes |
| Abnormal behavior | Yes |
| Coagulopathy | Yes |
→Ped NEXUS IINot ruled out
- Positive criteria：7/7
- Cue：≥1 criterion — consider CT / shared decision / observation pathway
Verification & sources · governance
FAQ
Frequently asked questions
- Does Pediatric NEXUS II Head CT Instrument upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Pediatric NEXUS II Head CT Instrument calculated in practice? Can you show a worked example?
- Inputs: Evidence of significant skull fracture No, Altered level of alertness No, Neurologic deficit No, Persistent vomiting No, Scalp hematoma No, Abnormal behavior No, Coagulopathy No → Result: Ped NEXUS II No high-risk criteria（Cue: Instrument suggests very low risk — CT often deferrable if otherwise well） Inputs: Evidence of significant skull fracture Yes, Altered level of alertness Yes, Neurologic deficit Yes, Persistent vomiting Yes, Scalp hematoma Yes, Abnormal behavior Yes, Coagulopathy Yes → Result: Ped NEXUS II Not ruled out（Positive criteria: 7/7, Cue: ≥1 criterion — consider CT / shared decision / observation pathway）