# Ranson criteria Ranson Status: LIVE Price: $0.005 USDC `GET /api/calc/ranson` HTML: https://magentlab.com/docs/ranson Markdown: https://magentlab.com/docs/ranson.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum the eleven Ranson 1974 prognostic signs (five at admission, six during the first 48 hours) and return the published mortality band. ## When to use When an agent already has the published cutoffs as flags and must not invent a Ranson total or an ICU triage decision. ## When not to use - Not a diagnosis, operative plan, or ICU order. Mortality bands group scores 0-2, 3-4, 5-6, and 7-11 as commonly reported from the 1974 series; magent does not reprint a percent as a prognosis for a named patient. - Complete score needs 48-hour signs. This tool does not parse raw labs; each cutoff is a boolean. Does not apply the later gallstone-modified cutoffs. ## Formula ``` Ranson = 5 admission signs + 6 signs during first 48 h; each 1 if present; max 11 ``` ## Citation [Prognostic signs and the role of operative management in acute pancreatitis](https://pubmed.ncbi.nlm.nih.gov/4834279) Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC Surg Gynecol Obstet. 1974;139(1):69-81 DOI: none ## Worked example ### No signs Given: `age_gt_55=false, ast_gt_250=false, base_deficit_gt_4=false, bun_rise_gt_5=false, calcium_lt_8=false, fluid_seq_gt_6l=false, glucose_gt_200=false, hct_drop_gt_10=false, ldh_gt_350=false, pao2_lt_60=false, wbc_gt_16k=false` 1. score = 0 2. band 0-2 ### Seven signs present Given: `age_gt_55=true, ast_gt_250=true, base_deficit_gt_4=false, bun_rise_gt_5=true, calcium_lt_8=false, fluid_seq_gt_6l=false, glucose_gt_200=true, hct_drop_gt_10=true, ldh_gt_350=true, pao2_lt_60=false, wbc_gt_16k=true` 1. score = 7 2. band 7-11 ## Also searched as - Ranson criteria - Ranson score - pancreatitis prognostic signs - Ranson 1974 - acute pancreatitis score ## Parameters - `age_gt_55` (boolean, required): Admission: age >55 years (Ranson 1974). true or false. - `wbc_gt_16k` (boolean, required): Admission: WBC >16 000/mm^3. true or false. - `glucose_gt_200` (boolean, required): Admission: blood glucose >200 mg/dL. true or false. - `ldh_gt_350` (boolean, required): Admission: LDH >350 IU/L. true or false. - `ast_gt_250` (boolean, required): Admission: AST >250 U/L. true or false. - `hct_drop_gt_10` (boolean, required): First 48 h: hematocrit fall >10 percentage points. true or false. - `bun_rise_gt_5` (boolean, required): First 48 h: BUN rise >5 mg/dL. true or false. - `calcium_lt_8` (boolean, required): First 48 h: serum calcium <8 mg/dL. true or false. - `pao2_lt_60` (boolean, required): First 48 h: arterial PaO2 <60 mm Hg. true or false. - `base_deficit_gt_4` (boolean, required): First 48 h: base deficit >4 mEq/L. true or false. - `fluid_seq_gt_6l` (boolean, required): First 48 h: estimated fluid sequestration >6 L. true or false. ## Bulk (POST) POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement. Method: `POST /api/calc/ranson` Max items: 25 Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic) Status: PREVIEW - 1 to 25 items. Each item uses the same keys as the GET query parameters. - POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows. - 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_gt_55": "false", "ast_gt_250": "false", "base_deficit_gt_4": "false", "bun_rise_gt_5": "false", "calcium_lt_8": "false", "fluid_seq_gt_6l": "false", "glucose_gt_200": "false", "hct_drop_gt_10": "false", "ldh_gt_350": "false", "pao2_lt_60": "false", "wbc_gt_16k": "false" }, { "age_gt_55": "false", "ast_gt_250": "false", "base_deficit_gt_4": "false", "bun_rise_gt_5": "false", "calcium_lt_8": "false", "fluid_seq_gt_6l": "false", "glucose_gt_200": "false", "hct_drop_gt_10": "false", "ldh_gt_350": "false", "pao2_lt_60": "false", "wbc_gt_16k": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/ranson Example 200: ```json { "count": 2, "path": "/api/calc/ranson", "items": [ { "components": [ { "factor": "age_gt_55", "points": 0, "present": false }, { "factor": "wbc_gt_16k", "points": 0, "present": false }, { "factor": "glucose_gt_200", "points": 0, "present": false }, { "factor": "ldh_gt_350", "points": 0, "present": false }, { "factor": "ast_gt_250", "points": 0, "present": false }, { "factor": "hct_drop_gt_10", "points": 0, "present": false }, { "factor": "bun_rise_gt_5", "points": 0, "present": false }, { "factor": "calcium_lt_8", "points": 0, "present": false }, { "factor": "pao2_lt_60", "points": 0, "present": false }, { "factor": "base_deficit_gt_4", "points": 0, "present": false }, { "factor": "fluid_seq_gt_6l", "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": "Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC", "id": "ranson-1974", "pmid": "4834279", "source": "Surg Gynecol Obstet. 1974;139(1):69-81", "title": "Prognostic signs and the role of operative management in acute pancreatitis" }, "formula": "ranson", "formula_expression": "Ranson = 5 admission signs + 6 signs during first 48 h; each 1 if present; max 11", "max_score": 11, "score": 0, "mortality_band": "0-2" }, { "components": [ { "factor": "age_gt_55", "points": 0, "present": false }, { "factor": "wbc_gt_16k", "points": 0, "present": false }, { "factor": "glucose_gt_200", "points": 0, "present": false }, { "factor": "ldh_gt_350", "points": 0, "present": false }, { "factor": "ast_gt_250", "points": 0, "present": false }, { "factor": "hct_drop_gt_10", "points": 0, "present": false }, { "factor": "bun_rise_gt_5", "points": 0, "present": false }, { "factor": "calcium_lt_8", "points": 0, "present": false }, { "factor": "pao2_lt_60", "points": 0, "present": false }, { "factor": "base_deficit_gt_4", "points": 0, "present": false }, { "factor": "fluid_seq_gt_6l", "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": "Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC", "id": "ranson-1974", "pmid": "4834279", "source": "Surg Gynecol Obstet. 1974;139(1):69-81", "title": "Prognostic signs and the role of operative management in acute pancreatitis" }, "formula": "ranson", "formula_expression": "Ranson = 5 admission signs + 6 signs during first 48 h; each 1 if present; max 11", "max_score": 11, "score": 0, "mortality_band": "0-2" } ] } ``` ## Response fields - `formula` (string): ranson - `formula_expression` (string): Exact expression used - `score` (integer): Ranson points 0-11 - `max_score` (integer): 11 - `mortality_band` (string): Published grouped mortality: 0-2, 3-4, 5-6, or 7-11. A band, not an ICU order. - `components` (array): Per-sign points - `citation` (object): Ranson et al. 1974 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "factor": "age_gt_55", "points": 0, "present": false }, { "factor": "wbc_gt_16k", "points": 0, "present": false }, { "factor": "glucose_gt_200", "points": 0, "present": false }, { "factor": "ldh_gt_350", "points": 0, "present": false }, { "factor": "ast_gt_250", "points": 0, "present": false }, { "factor": "hct_drop_gt_10", "points": 0, "present": false }, { "factor": "bun_rise_gt_5", "points": 0, "present": false }, { "factor": "calcium_lt_8", "points": 0, "present": false }, { "factor": "pao2_lt_60", "points": 0, "present": false }, { "factor": "base_deficit_gt_4", "points": 0, "present": false }, { "factor": "fluid_seq_gt_6l", "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": "Ranson JH, Rifkind KM, Roses DF, Fink SD, Eng K, Spencer FC", "id": "ranson-1974", "pmid": "4834279", "source": "Surg Gynecol Obstet. 1974;139(1):69-81", "title": "Prognostic signs and the role of operative management in acute pancreatitis" }, "formula": "ranson", "formula_expression": "Ranson = 5 admission signs + 6 signs during first 48 h; each 1 if present; max 11", "max_score": 11, "score": 0, "mortality_band": "0-2" } ``` ## Errors - HTTP 400 `invalid_flag`: boolean clinical flags must be true or false 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 - [BISAP](https://magentlab.com/docs/bisap) — Compute the Wu 2008 BISAP score for early prediction of mortality in acute pancreatitis from BUN, caller-assigned impaired mental status, caller-assigned SIRS, age, and caller-assigned pleural effusion. ## Payment Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, 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 accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON echoing accepted, payload, and extensions when present). - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact 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. - offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization. - 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. Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. 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 - HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. - exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. 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.