# ICH Score ICH Score ## Also searched as - ICH Score - Hemphill ICH Score - intracerebral hemorrhage score - ICH grading scale - Hemphill 2001 ICH - ICH volume IVH score - intraventricular hemorrhage ICH Score Status: LIVE Price: $0.005 USDC `GET /api/calc/ich_score` HTML: https://magentlab.com/docs/ich-score Markdown: https://magentlab.com/docs/ich-score.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Compute the Hemphill 2001 ICH Score from caller-assigned GCS, age, infratentorial origin, ICH volume, and IVH. ## When to use When an agent needs the published five-item ICH Score total and must not invent GCS, volume, IVH, or origin from a CT scan. ## When not to use - Not a diagnosis and not a withdrawal-of-care protocol. - The caller assigns GCS, ICH volume, IVH, and infratentorial origin. magent does not read a CT scan. - This is the Hemphill 2001 ICH Score, not the FUNC score and not ICH-GS. - The response is a point total (max 6). It does not include a 30-day mortality percentage table. ## Formula ``` ICH Score = gcs + age_ge_80 + infratentorial_origin + ich_volume_ge_30_ml + ivh; GCS 3-4 → 2, 5-12 → 1, 13-15 → 0; age >=80 1; infratentorial origin 1; volume >=30 mL 1; IVH 1; max 6 ``` ## Citation [The ICH Score: a simple, reliable grading scale for intracerebral hemorrhage](https://doi.org/10.1161/01.STR.32.4.891) Hemphill JC 3rd, Bonovich DC, Besmertis L, Manley GT, Johnston SC Stroke. 2001;32(4):891-897 DOI: [10.1161/01.STR.32.4.891](https://doi.org/10.1161/01.STR.32.4.891) ## Worked example ### All items absent Given: `age=70, gcs=15, ich_volume_ml=10, infratentorial_origin=false, ivh=false` 1. GCS 15 → 0; age 70 is not ≥80 → 0; infratentorial origin false → 0 2. Volume 10 mL is not ≥30 → 0; IVH false → 0 3. Score = 0 (max 6) ### All five items at maximum Given: `age=80, gcs=3, ich_volume_ml=30, infratentorial_origin=true, ivh=true` 1. GCS 3 → 2; age 80 ≥ 80 → 1; infratentorial origin true → 1 2. Volume 30 mL ≥ 30 → 1; IVH true → 1 3. Score = 6 (max 6) ## Parameters - `gcs` (integer, required): Caller-assigned GCS total (integer 3-15). 3-4 scores 2; 5-12 scores 1; 13-15 scores 0. magent does not compute GCS from eye, verbal, and motor here. - `age` (integer, required): Age in years (18-120). ≥80 scores 1; 79 does not. - `infratentorial_origin` (boolean, required): Infratentorial origin of the hemorrhage as assigned by the caller. true or false. 1 point if true. magent does not read a CT scan. - `ich_volume_ml` (number, required): ICH volume in mL (cm^3 in Hemphill 2001). Number from 0.1 to 300. ≥30 scores 1; 29.9 does not. magent does not measure volume from imaging. - `ivh` (boolean, required): Intraventricular hemorrhage as assigned by the caller. true or false. 1 point if true. magent does not read a CT scan. ## Bulk (POST) POST the same path with a JSON items array. Price is n times the GET unit. Invalid items return HTTP 400 before settlement. Method: `POST /api/calc/ich_score` Max items: 25 Price: unit_amount * n (unit 5000 atomic) Status: PREVIEW - 1 to 25 items. Each item uses the same keys as the GET query parameters. - The first invalid item fails the whole request (index in the 400 JSON). You are not charged. - HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row. - Catalog misses (empty matches, found=false) stay paid 200s inside that slot. - x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items. Example request: ```json { "items": [ { "age": "70", "gcs": "15", "ich_volume_ml": "10", "infratentorial_origin": "false", "ivh": "false" }, { "age": "70", "gcs": "15", "ich_volume_ml": "10", "infratentorial_origin": "false", "ivh": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/ich-score Example 200: ```json { "count": 2, "path": "/api/calc/ich_score", "items": [ { "components": [ { "value": 15, "factor": "gcs", "points": 0, "present": false }, { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "infratentorial_origin", "points": 0, "present": false }, { "value": 10.0, "factor": "ich_volume_ml", "points": 0, "present": false }, { "factor": "ivh", "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.", "citation": { "authors": "Hemphill JC 3rd, Bonovich DC, Besmertis L, Manley GT, Johnston SC", "doi": "10.1161/01.STR.32.4.891", "id": "hemphill-2001", "source": "Stroke. 2001;32(4):891-897", "title": "The ICH Score: a simple, reliable grading scale for intracerebral hemorrhage" }, "formula": "ich_score", "formula_expression": "ICH Score = gcs + age_ge_80 + infratentorial_origin + ich_volume_ge_30_ml + ivh; GCS 3-4 → 2, 5-12 → 1, 13-15 → 0; age >=80 1; infratentorial origin 1; volume >=30 mL 1; IVH 1; max 6", "max_score": 6, "score": 0, "age_years": 70, "gcs": 15, "ich_volume_ml": 10.0 }, { "components": [ { "value": 15, "factor": "gcs", "points": 0, "present": false }, { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "infratentorial_origin", "points": 0, "present": false }, { "value": 10.0, "factor": "ich_volume_ml", "points": 0, "present": false }, { "factor": "ivh", "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.", "citation": { "authors": "Hemphill JC 3rd, Bonovich DC, Besmertis L, Manley GT, Johnston SC", "doi": "10.1161/01.STR.32.4.891", "id": "hemphill-2001", "source": "Stroke. 2001;32(4):891-897", "title": "The ICH Score: a simple, reliable grading scale for intracerebral hemorrhage" }, "formula": "ich_score", "formula_expression": "ICH Score = gcs + age_ge_80 + infratentorial_origin + ich_volume_ge_30_ml + ivh; GCS 3-4 → 2, 5-12 → 1, 13-15 → 0; age >=80 1; infratentorial origin 1; volume >=30 mL 1; IVH 1; max 6", "max_score": 6, "score": 0, "age_years": 70, "gcs": 15, "ich_volume_ml": 10.0 } ] } ``` ## Response fields - `formula` (string): ich_score - `formula_expression` (string): Exact expression used - `score` (integer): Total points 0-6 - `max_score` (integer): Always 6 - `gcs` (integer): Caller-assigned GCS total used for the 3-4 / 5-12 / 13-15 bands - `age_years` (integer): Age used for the ≥80 criterion - `ich_volume_ml` (number): ICH volume in mL used for the ≥30 criterion - `components` (array): Per-item points - `citation` (object): Hemphill 2001 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 15, "factor": "gcs", "points": 0, "present": false }, { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "infratentorial_origin", "points": 0, "present": false }, { "value": 10.0, "factor": "ich_volume_ml", "points": 0, "present": false }, { "factor": "ivh", "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.", "citation": { "authors": "Hemphill JC 3rd, Bonovich DC, Besmertis L, Manley GT, Johnston SC", "doi": "10.1161/01.STR.32.4.891", "id": "hemphill-2001", "source": "Stroke. 2001;32(4):891-897", "title": "The ICH Score: a simple, reliable grading scale for intracerebral hemorrhage" }, "formula": "ich_score", "formula_expression": "ICH Score = gcs + age_ge_80 + infratentorial_origin + ich_volume_ge_30_ml + ivh; GCS 3-4 → 2, 5-12 → 1, 13-15 → 0; age >=80 1; infratentorial origin 1; volume >=30 mL 1; IVH 1; max 6", "max_score": 6, "score": 0, "age_years": 70, "gcs": 15, "ich_volume_ml": 10.0 } ``` ## Errors - HTTP 400 `invalid_gcs_total`: gcs must be an integer from 3 to 15. Returned before settlement; you are not charged. - HTTP 400 `invalid_age`: age must be an integer from 18 to 120 Returned before settlement; you are not charged. - HTTP 400 `invalid_flag`: boolean clinical flags must be true or false Returned before settlement; you are not charged. - HTTP 400 `invalid_ich_volume`: ich_volume_ml must be a number from 0.1 to 300. Returned before settlement; you are not charged. - HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged. - HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged. - HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged. Shared HTTP 402 and 503: https://magentlab.com/docs/payments ## Related tools - [Glasgow Coma Scale](https://magentlab.com/docs/gcs) — Compute the Glasgow Coma Scale as the sum of caller-assigned eye, verbal, and motor integers. The 1974 or 1976 edition is required. ## Payment Required query parameters must be present and valid. Invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. - GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall). - HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote. - Sign EIP-3009 (scheme exact, assetTransferMethod eip3009) with validBefore = now + accepts[0].maxTimeoutSeconds (600 seconds). That window starts when you sign and must cover wallet confirmation plus CDP verify and settle. Magent retries transient facilitator 429/5xx before answering. Do not send upto or batch-settlement payloads; magent does not offer those schemes. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON echoing accepted, payload, and extensions when present). - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. Settlement happens before the tool runs. HTTP 503 settlement_uncertain or settle_failed: retry the same PAYMENT-SIGNATURE. Mint a new nonce only after a new HTTP 402. - offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront. - not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search. - not offered `batch-settlement`: Not offered. Payment-channel vouchers claimed later in batches. Not the same as POST {items} bulk (that is still exact). Same-path POST {items} is still scheme exact: one EIP-3009 authorization for n times the GET unit. That is not x402 batch-settlement (payment channels / vouchers). Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments Stdio MCP (one process per host): https://magentlab.com/docs/mcp ## Guarantees - Invalid query parameters return HTTP 400 before settlement. You are not charged. - Settlement finishes before the tool executes (paymentFlow upfront). Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE. - HTTP 402 is unpaid only. Do not sign a second authorization because of a 503. - Execution is timeout-bounded and concurrency-capped. - Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.