{"uid":"cap_Bs4Zi_jpoWzM59ZHukpzO","slug":"dragon-score-calculator-for-iv-thrombolysis-outcome-9cd57bf1","name":"DRAGON Score Calculator for IV Thrombolysis Outcome","description":"DRAGON (Strbian 2012 Neurology) for 3-month outcome after IV thrombolysis. CT hyperdense artery or early infarct 0/1/2, prestroke mRS >1 (1), age <65/65-79/>=80 (0/1/2), glucose >8 mmol/L (mg/dL /18) (1), onset-to-treatment >90 min (1), NIHSS 0-4/5-9/10-15/>15 (0/1/2/3); max 10. Tabulated mRS 0-2 and mRS 5-6 percents for scores 0-1, 2, 3, 8, and 9-10 only. Not a tPA decision. Not studied in basilar occlusion. magent does not read CT or assign NIHSS.","url":"https://api.magentlab.com/api/calc/dragon","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","nihss","onset_to_treatment_min","hyperdense_artery","early_infarct_signs","prestroke_mrs_gt_1"],"properties":{"age":{"type":"integer","description":"Age in years (18-120). Strbian 2012: <65 scores 0; 65-79 scores 1; ≥80 scores 2."},"nihss":{"type":"integer","description":"Caller-assigned NIH Stroke Scale total (integer 0-42). 0-4 scores 0; 5-9 scores 1; 10-15 scores 2; >15 (16-42) scores 3. magent does not compute NIHSS or examine the patient."},"glucose_mg_dl":{"type":"number","description":"Baseline glucose in mg/dL (50-1000). Converted as mmol/L = mg/dL / 18. Provide this or glucose_mmol_l, not both. >144 mg/dL scores; 144 does not."},"glucose_mmol_l":{"type":"number","description":"Baseline glucose in mmol/L (2.8-55.5). Provide this or glucose_mg_dl, not both. 1 point if >8.0; 8.0 does not score."},"hyperdense_artery":{"type":"boolean","description":"(Hyper)dense cerebral artery sign on admission CT as assigned by the caller (Strbian 2012). true scores 1. Combined with early_infarct_signs: none 0, either 1, both 2. magent does not read CT."},"prestroke_mrs_gt_1":{"type":"boolean","description":"Prestroke modified Rankin Scale >1 as assigned by the caller (Strbian 2012). true scores 1; false scores 0. Do not send a raw mRS integer. magent does not assign mRS."},"early_infarct_signs":{"type":"boolean","description":"Early infarct signs on admission CT as assigned by the caller (Strbian 2012). true scores 1. Combined with hyperdense_artery: none 0, either 1, both 2. magent does not read CT."},"onset_to_treatment_min":{"type":"integer","description":"Onset-to-treatment time in minutes (integer 0-360). >90 scores 1; 90 does not. magent does not clock the delay."}}}},"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_C1XjdYEmG7D4-cmUr9hZA","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 DRAGON score (Strbian 2012) to estimate 3-month functional outcome probabilities after IV thrombolysis in acute ischemic stroke","exampleAgentPrompt":"Calculate the DRAGON score for my 74-year-old stroke patient: NIHSS is 11, onset-to-treatment was 110 minutes, hyperdense artery sign is present on CT, no early infarct signs, prestroke mRS was greater than 1, and baseline glucose is 162 mg/dL — what are the 3-month mRS 0-2 and mRS 5-6 outcome probabilities?","exampleUseCases":[{"title":"ED prognosis for thrombolysis candidate","prompt":"I have a 68-year-old patient getting tPA right now — NIHSS 14, onset to treatment 85 minutes, no hyperdense artery, no early infarct signs, prestroke mRS was fine (not >1), glucose 190 mg/dL. Can you compute their DRAGON score and tell me the expected 3-month good outcome and severe disability rates?"},{"title":"Post-tPA family counseling prep","prompt":"Help me counsel a family: the patient is 82 years old, NIHSS 17, treatment started 120 minutes after onset, CT shows both hyperdense artery and early infarct signs, prestroke mRS >1, glucose 9.2 mmol/L. Run the DRAGON score so I know the mRS 0-2 and mRS 5-6 percentages to discuss."},{"title":"Stroke registry data enrichment","prompt":"For this registry case — age 61, NIHSS 6, onset-to-treatment 55 minutes, hyperdense artery false, early infarct signs false, prestroke mRS not greater than 1, glucose 105 mg/dL — compute the DRAGON score and the associated outcome probabilities for the 3-month follow-up field."}],"resultDescription":"Returns the total DRAGON score (integer 0-10) and tabulated probability percentages for mRS 0-2 (good functional outcome) and mRS 5-6 (death or severe disability) at 3 months, drawn from the Strbian 2012 lookup table for the computed score band. Scores outside tabulated bands (e.g. 4-7) may return interpolated or nearest-band values per the API's implementation.","failureModes":["Missing required parameters (age, nihss, onset_to_treatment_min, hyperdense_artery, early_infarct_signs, prestroke_mrs_gt_1) returns 400 error","Providing both glucose_mg_dl and glucose_mmol_l simultaneously returns an error","Age or NIHSS outside valid range returns validation error","Score falls outside the tabulated bands (0-1, 2, 3, 8, 9-10) — intermediate scores may lack exact mRS percentage lookup","Payment not provided or insufficient results in 402 response"],"whenToPreferThis":"Use this endpoint when you need a validated, automatable DRAGON score computation for acute ischemic stroke patients who have received or are about to receive IV thrombolysis, and you already have caller-assigned NIHSS, CT findings, and clinical parameters available. Prefer this over manual calculation when building stroke registries, clinical dashboards, or agent-assisted ED workflows. Do not use for basilar artery occlusion, as it was not studied in that population, and do not use as a tPA go/no-go decision tool.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:57:17.086Z","isFirstParty":false}