{"uid":"cap_SSW6AoFhIjTvkSyUPd63Y","slug":"samuel-2002-pediatric-appendicitis-score-pas-calculator-ab721978","name":"Samuel 2002 Pediatric Appendicitis Score (PAS) Calculator","description":"Samuel 2002 pediatric appendicitis score from eight caller-assigned findings, ages 4-15, max 10. Cough/percussion/hopping RLQ and RIF tenderness score 2; anorexia, pyrexia, nausea/emesis, leukocytosis, neutrophilia, and migration score 1. Fever and labs are flags, not unpublished cutoffs. Not Alvarado (MANTRELS). Not a diagnosis or operating-room protocol. magent does not examine the abdomen.","url":"https://api.magentlab.com/api/calc/pas","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","required":["age","cough_percussion_hopping_rlq","anorexia","pyrexia","nausea_emesis","rif_tenderness","leukocytosis","neutrophilia","migration"],"properties":{"age":{"type":"integer","description":"Age in years as an integer from 4 to 15 (Samuel 2002 derivation cohort). Age does not add points. 3 and 16 are rejected."},"pyrexia":{"type":"boolean","description":"Caller-assigned pyrexia (Samuel named pyrexia; the derivation paper does not publish a °C cutoff). true scores 1; false scores 0."},"anorexia":{"type":"boolean","description":"Anorexia (Samuel). true scores 1; false scores 0."},"migration":{"type":"boolean","description":"Migration of pain (Samuel). true scores 1; false scores 0."},"leukocytosis":{"type":"boolean","description":"Caller-assigned leukocytosis (Samuel 2002; no published WBC cutoff). true scores 1; false scores 0."},"neutrophilia":{"type":"boolean","description":"Caller-assigned neutrophilia (Samuel 2002; no published percent or count cutoff). true scores 1; false scores 0."},"nausea_emesis":{"type":"boolean","description":"Nausea or emesis (Samuel). true scores 1; false scores 0."},"rif_tenderness":{"type":"boolean","description":"Tenderness over the right iliac fossa (Samuel physical sign 5). true scores 2; false scores 0."},"cough_percussion_hopping_rlq":{"type":"boolean","description":"Cough, percussion, or hopping tenderness in the right lower quadrant (Samuel physical sign 1). true scores 2; false scores 0."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/pas","count":2,"items":[{"age":10,"score":0,"formula":"pas","citation":{"id":"samuel-2002","doi":"10.1053/jpsu.2002.32893","pmid":"12037754","title":"Pediatric appendicitis score","source":"J Pediatr Surg. 2002;37(6):877-881","authors":"Samuel M"},"max_score":10,"components":[{"factor":"cough_percussion_hopping_rlq","points":0,"present":false},{"factor":"anorexia","points":0,"present":false},{"factor":"pyrexia","points":0,"present":false},{"factor":"nausea_emesis","points":0,"present":false},{"factor":"rif_tenderness","points":0,"present":false},{"factor":"leukocytosis","points":0,"present":false},{"factor":"neutrophilia","points":0,"present":false},{"factor":"migration","points":0,"present":false}],"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","formula_expression":"PAS = 2*cough_percussion_hopping_rlq + anorexia + pyrexia + nausea_emesis + 2*rif_tenderness + leukocytosis + neutrophilia + migration; max 10"},{"age":10,"score":0,"formula":"pas","citation":{"id":"samuel-2002","doi":"10.1053/jpsu.2002.32893","pmid":"12037754","title":"Pediatric appendicitis score","source":"J Pediatr Surg. 2002;37(6):877-881","authors":"Samuel M"},"max_score":10,"components":[{"factor":"cough_percussion_hopping_rlq","points":0,"present":false},{"factor":"anorexia","points":0,"present":false},{"factor":"pyrexia","points":0,"present":false},{"factor":"nausea_emesis","points":0,"present":false},{"factor":"rif_tenderness","points":0,"present":false},{"factor":"leukocytosis","points":0,"present":false},{"factor":"neutrophilia","points":0,"present":false},{"factor":"migration","points":0,"present":false}],"disclaimer":"Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.","formula_expression":"PAS = 2*cough_percussion_hopping_rlq + anorexia + pyrexia + nausea_emesis + 2*rif_tenderness + leukocytosis + neutrophilia + migration; max 10"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Sxyc8AjzEGuEYLfYM5Rgo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Samuel 2002 Pediatric Appendicitis Score (max 10) for children aged 4–15 from eight caller-assigned clinical findings","exampleAgentPrompt":"Calculate the Pediatric Appendicitis Score for a 9-year-old who has anorexia, nausea, migration of pain, cough/hopping tenderness in the RLQ, RIF tenderness, and the clinician flagged pyrexia, leukocytosis, and neutrophilia as present.","exampleUseCases":[{"title":"Pediatric ER triage decision support","prompt":"I have a 7-year-old in the ER with right iliac fossa tenderness and cough/percussion/hopping tenderness in the RLQ. She has anorexia and has been vomiting, migration of pain is present, and labs show leukocytosis and neutrophilia. No fever flagged. Can you compute her Samuel PAS score?"},{"title":"Telemedicine pre-transfer appendicitis risk","prompt":"We're considering transferring a 12-year-old boy to a surgical center — he has migration of pain, anorexia, RIF tenderness, and nausea, no cough tenderness, no pyrexia, and labs show leukocytosis but not neutrophilia. What's his PAS score so we can decide urgency?"},{"title":"Clinical audit of appendicitis scoring accuracy","prompt":"For a 15-year-old patient in our audit dataset: anorexia yes, pyrexia yes, nausea yes, leukocytosis yes, neutrophilia yes, migration yes, RIF tenderness yes, cough/percussion/hopping RLQ tenderness yes — please calculate the Samuel 2002 PAS total score."}],"resultDescription":"Returns the computed Pediatric Appendicitis Score as an integer from 0 to 10, reflecting the sum of eight weighted clinical items: cough/percussion/hopping RLQ tenderness and RIF tenderness each contribute 2 points; anorexia, pyrexia, nausea/emesis, leukocytosis, neutrophilia, and migration of pain each contribute 1 point. The response may include a breakdown of individual item contributions for audit or display purposes.","failureModes":["Age outside 4–15 range (e.g., 3 or 16) is rejected with a validation error","Missing any of the nine required query parameters returns an error","Non-boolean values for flag fields cause schema validation failure","Incorrect type for age (non-integer, float) causes rejection","Network or payment errors (402) if x402 payment is not properly attached"],"whenToPreferThis":"Use this endpoint when you need a structured, reproducible Samuel 2002 PAS computation for a child aged 4–15 with caller-assigned clinical findings and lab flags. Prefer this over Alvarado/MANTRELS scoring endpoints — this is explicitly the Samuel 2002 pediatric-specific tool, not the adult-oriented MANTRELS. Appropriate when a clinician or structured decision-support workflow has already assessed and assigned the eight binary clinical findings and needs a reliable score returned without manual arithmetic.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:39:07.378Z","isFirstParty":false}