{"uid":"cap_ke_n4iL94-_IwxWmdyNkW","slug":"ukeld-calculator-barber-2011-c2e31bfe","name":"UKELD Calculator (Barber 2011)","description":"Barber 2011 United Kingdom end-stage liver disease (UKELD) from INR, creatinine, bilirubin, and sodium in native SI units. UKELD = 5.395*ln(INR) + 1.485*ln(creatinine_umol_l) + 3.13*ln(bilirubin_umol_l) - 81.565*ln(sodium_mmol_l) + 435, nearest integer. below_listing if <49; listing_threshold if ≥49 (UK elective-list 9% 1-year mortality cut). Not a transplant listing or allocation order. Not MELD or MELD-Na.","url":"https://api.magentlab.com/api/calc/ukeld","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":["inr","sodium_mmol_l"],"properties":{"inr":{"type":"number","description":"International normalized ratio (0.8-10). Barber 2011 does not floor INR at 1."},"sodium_mmol_l":{"type":"number","description":"Serum sodium in mmol/L (110-160). Barber 2011 does not clamp sodium to 125–137."},"bilirubin_mg_dl":{"type":"number","description":"Total bilirubin in mg/dL (0.1-40). Converted as µmol/L = mg/dL × 17.1. Provide this or bilirubin_umol_l, not both."},"bilirubin_umol_l":{"type":"number","description":"Total bilirubin in µmol/L (2-684). Provide this or bilirubin_mg_dl, not both. Barber 2011 uses µmol/L; no MELD floor."},"creatinine_mg_dl":{"type":"number","description":"Serum creatinine in mg/dL (0.1-20). Converted as µmol/L = mg/dL × 88.42. Provide this or creatinine_umol_l, not both."},"creatinine_umol_l":{"type":"number","description":"Serum creatinine in µmol/L (9-1768). Provide this or creatinine_mg_dl, not both. Barber 2011 uses µmol/L; no MELD floor."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"path":"/api/calc/ukeld","count":2,"items":[{"inr":1.2,"ukeld":54,"formula":"ukeld","citation":{"id":"barber-2011","doi":"10.1097/TP.0b013e318225db4d","pmid":"21775931","title":"Elective liver transplant list mortality: development of a United Kingdom end-stage liver disease score","source":"Transplantation. 2011;92(4):469-476","authors":"Barber K, Madden S, Allen J, Collett D, Neuberger J, Gimson A; United Kingdom Liver Transplant Selection and Allocation Working Party"},"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.","ukeld_band":"listing_threshold","sodium_mmol_l":135,"bilirubin_umol_l":40,"creatinine_umol_l":90,"formula_expression":"UKELD = 5.395 * ln(INR) + 1.485 * ln(creatinine_umol_l) + 3.13 * ln(bilirubin_umol_l) - 81.565 * ln(sodium_mmol_l) + 435"},{"inr":1.2,"ukeld":54,"formula":"ukeld","citation":{"id":"barber-2011","doi":"10.1097/TP.0b013e318225db4d","pmid":"21775931","title":"Elective liver transplant list mortality: development of a United Kingdom end-stage liver disease score","source":"Transplantation. 2011;92(4):469-476","authors":"Barber K, Madden S, Allen J, Collett D, Neuberger J, Gimson A; United Kingdom Liver Transplant Selection and Allocation Working Party"},"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.","ukeld_band":"listing_threshold","sodium_mmol_l":135,"bilirubin_umol_l":40,"creatinine_umol_l":90,"formula_expression":"UKELD = 5.395 * ln(INR) + 1.485 * ln(creatinine_umol_l) + 3.13 * ln(bilirubin_umol_l) - 81.565 * ln(sodium_mmol_l) + 435"}]}},"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_juezYgCoZDFwjZF0jfElI","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":"Calculates the UK End-Stage Liver Disease (UKELD) score from INR, creatinine, bilirubin, and sodium in native SI units, and returns whether the patient meets the UK transplant listing threshold.","exampleAgentPrompt":"Calculate the UKELD score for a patient with INR 2.3, creatinine 210 µmol/L, bilirubin 88 µmol/L, and sodium 130 mmol/L — and tell me whether they meet the UK elective transplant listing threshold.","exampleUseCases":[{"title":"Pre-transplant assessment triage","prompt":"My patient has INR 1.9, creatinine 175 µmol/L, bilirubin 112 µmol/L, and sodium 128 mmol/L — what's their UKELD score and do they hit the ≥49 UK listing threshold?"},{"title":"Hepatology clinic chart automation","prompt":"Automatically compute the UKELD score for today's clinic patient whose labs came back as INR 2.6, creatinine 260 µmol/L, bilirubin 145 µmol/L, and serum sodium 131 mmol/L."},{"title":"Liver disease severity trend tracking","prompt":"Last month this patient's UKELD was 46; their new labs are INR 2.8, creatinine 310 µmol/L, bilirubin 200 µmol/L, sodium 127 mmol/L — recalculate and tell me if they've crossed the listing threshold."}],"resultDescription":"Returns an integer UKELD score computed using the Barber 2011 formula (5.395×ln(INR) + 1.485×ln(creatinine_µmol/L) + 3.13×ln(bilirubin_µmol/L) − 81.565×ln(sodium_mmol/L) + 435, rounded to nearest integer) and a classification string: 'below_listing' if score <49, or 'listing_threshold' if score ≥49, corresponding to the UK elective transplant listing 9% one-year mortality cut-off.","failureModes":["Missing required parameters (INR or sodium_mmol_l not provided) returns a 400 error","Both bilirubin_umol_l and bilirubin_mg_dl provided simultaneously — only one should be supplied","Both creatinine_umol_l and creatinine_mg_dl provided simultaneously — only one should be supplied","Values outside expected physiological ranges (e.g. sodium outside 110–160 mmol/L) may be rejected or produce clinically implausible scores","Payment not included or insufficient USDC balance returns a 402 Payment Required error"],"whenToPreferThis":"Use this endpoint when you need the UKELD score specifically — the UK-specific liver disease severity score used for elective transplant listing decisions in the United Kingdom — as distinct from MELD or MELD-Na which are used in the US. Prefer this when lab values are available in native SI units (µmol/L, mmol/L) to avoid manual unit conversion, or supply mg/dL values directly since the API converts them automatically. Not appropriate for US-based MELD/UNOS allocation decisions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T01:20:16.021Z","isFirstParty":false}