{"uid":"cap_kigoWpBMW7oYK6a0Sw74N","slug":"cp-sss-calculator-cincinnati-prehospital-stroke-severity-scale-f1f6a466","name":"CP-SSS Calculator (Cincinnati Prehospital Stroke Severity Scale)","description":"Katz 2015 Cincinnati Prehospital Stroke Severity Scale (CP-SSS): gaze deviation 2 if present else 0 + abnormal LOC 1 + arm cannot hold 10 s 1. Max 4. severe_stroke_suggested iff score ≥ 2. Not the 3-item CPSS facial/arm/speech screen, not NIHSS, not a tPA decision. magent does not examine the patient.","url":"https://api.magentlab.com/api/calc/cpsss","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":["gaze_deviation","loc_abnormal","arm_weakness"],"properties":{"arm_weakness":{"type":"boolean","description":"Caller-assigned Katz 2015 arm weakness: cannot hold arm up for 10 s (arm falls or no effort against gravity). true if present. magent does not examine the patient."},"loc_abnormal":{"type":"boolean","description":"Caller-assigned Katz 2015 incorrect level of consciousness (cannot answer age or current month correctly, or cannot follow commands). true if abnormal, false if normal. magent does not examine the patient."},"gaze_deviation":{"enum":[0,2],"type":"integer","description":"Caller-assigned Katz 2015 conjugate gaze deviation. Integer 0 absent or 2 present (not 1). magent does not examine the patient."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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_PLXm9YmGNDejBNoBOvGcX","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 Katz 2015 Cincinnati Prehospital Stroke Severity Scale (CP-SSS) score from gaze deviation, level of consciousness, and arm weakness to flag potential large-vessel occlusion stroke.","exampleAgentPrompt":"Score this suspected stroke patient on the Cincinnati Prehospital Stroke Severity Scale: gaze deviation is present (score 2), the patient cannot correctly answer their age or follow commands (LOC abnormal), and the arm falls without sustained effort — do the math and tell me if the score suggests a severe stroke.","exampleUseCases":[{"title":"Prehospital LVO triage decision","prompt":"EMS is on scene with a patient showing conjugate gaze deviation present, abnormal level of consciousness (can't state their age), and arm weakness with no effort against gravity. Run the CP-SSS and tell me if the score hits the severe stroke threshold."},{"title":"Negative screen — no severe stroke features","prompt":"Check the CP-SSS for a patient with no gaze deviation, normal LOC, and arm weakness only — gaze deviation absent (0), LOC normal, arm weakness true. Is there a severe stroke flag?"},{"title":"Clinical documentation and handoff support","prompt":"I need the CP-SSS score documented for a stroke alert patient: gaze deviation present, level of consciousness abnormal, no arm weakness detected. Give me the total score and whether severe stroke is suggested."}],"resultDescription":"Returns the total CP-SSS score (integer 0–4, where gaze deviation contributes 0 or 2 points and each of LOC abnormality and arm weakness contribute 1 point each), plus a boolean or equivalent flag indicating whether the score is ≥ 2 (severe stroke suggested). Does not make treatment decisions or tPA recommendations.","failureModes":["Missing required query parameters (gaze_deviation, loc_abnormal, arm_weakness) returns a validation error","gaze_deviation supplied as 1 instead of 0 or 2 is rejected (enum constraint)","Network or payment failure returns HTTP 402 or 5xx","Caller misclassifies clinical findings before input — garbage in, garbage out; the API cannot examine the patient"],"whenToPreferThis":"Use this endpoint when you need a programmatic, auditable CP-SSS calculation based on the Katz 2015 three-item scale (gaze deviation, LOC, arm weakness) — especially in prehospital or emergency triage workflows where consistent scoring and large-vessel occlusion flagging are needed. Prefer this over manual arithmetic when integrating stroke scoring into an automated clinical decision-support pipeline. Do not use as a substitute for the classic three-item CPSS (facial droop/arm drift/speech), for NIHSS computation, or for tPA eligibility determination.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:54:19.746Z","isFirstParty":false}