🧒 Pediatric Appendicitis Score (PAS)
UseDescribing the likelihood of appendicitis in a child with acute abdominal pain.
StrataSamuel 2002 (PMID 12037754): 8 variables, maximum 10; sensitivity 1 and specificity 0.92 in the original stud…
LimitsNot a diagnosis or disposition decision on its own. · Interpret with history, examination and other tests. · For licensed clinicians; does not replace clinical judgement.
SourceSamuel M. Pediatric appendicitis score. J Pediatr Surg 2002;37:877-81. PMID 12037754
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
8 items, maximum 10.
When to use
Describing the likelihood of appendicitis in a child with acute abdominal pain.
How it works
Cough/percussion/hopping tenderness 2 + RLQ tenderness 2 + anorexia, fever ≥38 °C, nausea/vomiting, migration, WBC >10×10⁹/L, neutrophils >7.5×10⁹/L 1 each; maximum 10.
Key points
- 8 items, maximum 10.
- Sensitivity 1, specificity 0.92 in the original study (Samuel 2002).
- Combine with serial examination and imaging.
References
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.
| Cough/percussion/hopping tenderness (RLQ) | No |
|---|---|
| Right lower quadrant tenderness | No |
| Anorexia | No |
| Fever ≥38 °C | No |
| Nausea/vomiting | No |
| Migration of pain to RLQ | No |
| WBC >10×10⁹/L | No |
| Neutrophils >7.5×10⁹/L | No |
→PAS0/10
- Scoring：Cough/percussion/hopping tenderness and RLQ tenderness 2 each; others 1 each
| Cough/percussion/hopping tenderness (RLQ) | Yes (+2) |
|---|---|
| Right lower quadrant tenderness | Yes (+2) |
| Anorexia | Yes (+1) |
| Fever ≥38 °C | Yes (+1) |
| Nausea/vomiting | Yes (+1) |
| Migration of pain to RLQ | Yes (+1) |
| WBC >10×10⁹/L | Yes (+1) |
| Neutrophils >7.5×10⁹/L | Yes (+1) |
→PAS10/10
- Scoring：Cough/percussion/hopping tenderness and RLQ tenderness 2 each; others 1 each
Verification & sources · governance
FAQ
Frequently asked questions
- Does Pediatric Appendicitis Score (PAS) 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 Appendicitis Score (PAS) calculated in practice? Can you show a worked example?
- Inputs: Cough/percussion/hopping tenderness (RLQ) No, Right lower quadrant tenderness No, Anorexia No, Fever ≥38 °C No, Nausea/vomiting No, Migration of pain to RLQ No, WBC >10×10⁹/L No, Neutrophils >7.5×10⁹/L No → Result: PAS 0 /10（Scoring: Cough/percussion/hopping tenderness and RLQ tenderness 2 each; others 1 each） Inputs: Cough/percussion/hopping tenderness (RLQ) Yes (+2), Right lower quadrant tenderness Yes (+2), Anorexia Yes (+1), Fever ≥38 °C Yes (+1), Nausea/vomiting Yes (+1), Migration of pain to RLQ Yes (+1), WBC >10×10⁹/L Yes (+1), Neutrophils >7.5×10⁹/L Yes (+1) → Result: PAS 10 /10（Scoring: Cough/percussion/hopping tenderness and RLQ tenderness 2 each; others 1 each）