{"uid":"cap_4pye7RpHWp_mTeAp75hqw","slug":"magent-mbig-khan-2020-modified-brain-injury-guidelines-calculator-f17f12a4","name":"magent mBIG — Khan 2020 Modified Brain Injury Guidelines Calculator","description":"Khan 2020 modified Brain Injury Guidelines (mBIG), not original Joseph 2014 BIG. First-match worst-wins tier 3 then 2 then 1 from caller-assigned GCS, focal or pupillary abnormality, anticoagulant or antiplatelet excluding aspirin alone, EtOH >80 mg/dL, skull fracture, SDH mm, IPH mm and multiple IPH, SAH pattern and mm, any EDH, and IVH. Any EDH is mBIG 3. magent does not read CT. Adults with mild TBI and traumatic ICH. Not a diagnosis or neurosurgical plan. Not a medical device.","url":"https://api.magentlab.com/api/calc/mbig","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":["gcs","focal_neuro_or_pupillary_abnormality","ac_ap_excluding_aspirin","etoh_gt_80","skull_fracture","sdh_mm","iph_mm","multiple_iph","sah_pattern","sah_mm","edh","ivh"],"properties":{"edh":{"type":"boolean","description":"Any epidural hematoma as assigned by the caller. true or false. Any EDH is mBIG 3 (Khan 2020 safety modification versus original BIG size bands). magent does not read CT."},"gcs":{"type":"integer","description":"Caller-assigned Glasgow Coma Scale total, integer 3-15. Khan 2020 methods: GCS of 12 or less is an abnormal neurologic examination and is mBIG 3. magent does not compute eye, verbal, or motor GCS."},"ivh":{"type":"boolean","description":"Intraventricular hemorrhage as assigned by the caller. true or false. true is mBIG 3. magent does not read CT."},"iph_mm":{"type":"number","description":"Largest intraparenchymal hemorrhage size in millimetres as assigned by the caller (0-40). mBIG 1 if <4, mBIG 2 if >=4 and <8, mBIG 3 if >=8. Use 0 when no IPH. magent does not measure IPH or read CT."},"sah_mm":{"type":"number","description":"SAH thickness in millimetres as assigned by the caller (0-20). mBIG 1 if <1, mBIG 2 if 1-3, mBIG 3 if >3. Use 0 when none. Combined with sah_pattern; either scattered pattern or >3 mm is mBIG 3. magent does not measure SAH."},"sdh_mm":{"type":"number","description":"Largest subdural hematoma thickness in millimetres as assigned by the caller (0-40). mBIG 1 if <4, mBIG 2 if >=4 and <8, mBIG 3 if >=8. magent does not measure SDH or read CT."},"etoh_gt_80":{"type":"boolean","description":"Blood alcohol concentration >80 mg/dL as assigned by the caller (Khan 2020 intoxication definition, US legal driving limit). true or false. true excludes mBIG 1 (mBIG 2 unless a mBIG 3 feature is also met). magent does not assay ethanol."},"sah_pattern":{"enum":["none_or_trace","localized","scattered"],"type":"string","description":"Traumatic SAH pattern as assigned by the caller from Khan 2020 sulci/hemisphere definitions that replace original BIG trace/localized/scattered: none_or_trace (<=3 sulci and <1 mm), localized (one hemisphere, >3 sulci, 1-3 mm), or scattered (bi-hemispheric or >3 mm). magent does not read CT."},"multiple_iph":{"type":"boolean","description":"Multiple intraparenchymal hemorrhages as assigned by the caller. true or false. true is mBIG 3. magent does not count lesions on CT."},"skull_fracture":{"enum":["none","nondisplaced","displaced"],"type":"string","description":"Skull fracture as assigned by the caller from CT: none (mBIG 1 row), nondisplaced (mBIG 2), or displaced (mBIG 3). magent does not read CT."},"ac_ap_excluding_aspirin":{"type":"boolean","description":"Anticoagulant or antiplatelet therapy excluding aspirin alone, as assigned by the caller. true or false. true is mBIG 3. Aspirin monotherapy is false. magent does not read a medication list."},"focal_neuro_or_pupillary_abnormality":{"type":"boolean","description":"Focal neurologic deficit or abnormal pupillary findings as assigned by the caller (Khan 2020 abnormal neurologic examination). true or false. true is mBIG 3. 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_6aijVmDqJBChMXqKvQlZn","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 a Khan 2020 modified Brain Injury Guidelines (mBIG) tier (1, 2, or 3) for adults with mild TBI and traumatic intracranial hemorrhage based on caller-assigned clinical and imaging findings.","exampleAgentPrompt":"Using the Khan 2020 mBIG calculator, score this patient: GCS 14, no focal neuro or pupillary abnormality, on warfarin (anticoagulant), blood alcohol negative, no skull fracture, SDH 3 mm, no IPH, no multiple IPH, scattered SAH pattern with 0 mm thickness, no EDH, no IVH.","exampleUseCases":[{"title":"Anticoagulated patient with subdural hematoma","prompt":"Run the mBIG score for a mild TBI patient on apixaban: GCS 15, no focal neuro findings, anticoagulated (not just aspirin), no alcohol, no skull fracture, SDH 5 mm, no IPH, no multiple IPH, no SAH, no EDH, no IVH — what tier does that come out to?"},{"title":"EDH on CT after head trauma","prompt":"I have a patient with a mild TBI and an epidural hematoma on CT — GCS 13, no pupillary abnormality, not on anticoagulants, no alcohol, no skull fracture, no SDH, no IPH, no SAH, no IVH. Can you run the mBIG calculator and tell me the tier?"},{"title":"Multiple IPH with low GCS","prompt":"Calculate the Khan 2020 mBIG tier for this case: GCS 12, no focal neuro or pupillary findings, aspirin only (not anticoagulated), blood alcohol >80 mg/dL, no skull fracture, no SDH, IPH 9 mm, multiple IPH present, no SAH, no EDH, no IVH."}],"resultDescription":"Returns the mBIG tier (1, 2, or 3) computed using Khan 2020 first-match worst-wins logic across the submitted clinical and imaging parameters. Tier 3 is the most severe classification. The result is a clinical score only — not a diagnosis or neurosurgical management plan.","failureModes":["Missing required query parameters (gcs, edh, ivh, etc.) returns a 400 or validation error","GCS value outside integer range 3–15 may cause a validation error","SDH, IPH, or SAH mm values outside allowed range cause input rejection","Boolean parameters passed as non-boolean types cause parsing errors","Payment not completed (x402) results in a 402 Payment Required response"],"whenToPreferThis":"Use this endpoint when you need to apply the specific Khan 2020 mBIG criteria to adult mild TBI patients with traumatic intracranial hemorrhage and want an automated, auditable tier classification. Prefer this over general TBI scoring tools when the Khan 2020 mBIG tier specifically is required (e.g., for clinical protocol adherence). Note: this endpoint does not read CT images; all imaging findings must be caller-assigned. Not applicable for pediatric patients or for cases outside mild TBI with traumatic ICH.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:21:09.836Z","isFirstParty":false}