{"uid":"cap_0ylrEtxaWE58_T2gk7st2","slug":"murray-lung-injury-score-lis-calculator-c145865a","name":"Murray Lung Injury Score (LIS) Calculator","description":"Murray 1988 lung injury score (LIS): mean of four 0–4 components (caller-assigned CXR quadrants; PaO2/FiO2 ≥300→0, 225–299→1, 175–224→2, 100–174→3, <100→4; PEEP cm H2O ≤5→0, 6–8→1, 9–11→2, 12–14→3, ≥15→4; compliance mL/cm H2O ≥80→0, 60–79→1, 40–59→2, 20–39→3, ≤19→4). LIS 0 none, 0<LIS≤2.5 mild_moderate, >2.5 severe. Not a medical device, not a Berlin ARDS diagnosis, not a ventilator order. magent does not interpret imaging.","url":"https://api.magentlab.com/api/calc/murray","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":["chest_radiograph_quadrants","pf_ratio","peep_cm_h2o","compliance_ml_cm_h2o"],"properties":{"pf_ratio":{"type":"number","description":"PaO2/FiO2 ratio (20-800). Murray 1988: ≥300 → 0, 225-299 → 1, 175-224 → 2, 100-174 → 3, <100 → 4. magent does not read an ABG."},"peep_cm_h2o":{"type":"number","description":"PEEP in cm H2O (0-40). Murray 1988: ≤5 → 0, 6-8 → 1, 9-11 → 2, 12-14 → 3, ≥15 → 4. Not a ventilator order. magent does not set PEEP."},"compliance_ml_cm_h2o":{"type":"number","description":"Respiratory system compliance in mL/cm H2O (5-200). Murray 1988: ≥80 → 0, 60-79 → 1, 40-59 → 2, 20-39 → 3, ≤19 → 4. magent does not measure compliance."},"chest_radiograph_quadrants":{"enum":[0,1,2,3,4],"type":"integer","description":"Caller-assigned alveolar consolidation quadrants 0-4 (Murray 1988). 0 none, 1 one quadrant, 2 two quadrants, 3 three quadrants, 4 four quadrants. The integer is that component's points. magent does not interpret imaging."}}}},"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_YhhfOsllah-cGdQEdFhoZ","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 Murray 1988 Lung Injury Score from four clinical components (CXR quadrants, PaO2/FiO2 ratio, PEEP, and respiratory compliance) and returns a severity classification.","exampleAgentPrompt":"Calculate the Murray lung injury score for a patient with 3 chest X-ray quadrants involved, a PaO2/FiO2 ratio of 150, PEEP of 10 cm H2O, and respiratory compliance of 35 mL/cm H2O — tell me the LIS and whether it's mild-moderate or severe.","exampleUseCases":[{"title":"ICU triage lung injury stratification","prompt":"My ICU patient has alveolar consolidation in 2 chest X-ray quadrants, a PF ratio of 220, PEEP of 8 cm H2O, and compliance of 55 mL/cm H2O — what's their Murray lung injury score and severity class?"},{"title":"Serial LIS tracking during ventilator weaning","prompt":"Yesterday's Murray score used PF ratio 180, PEEP 12, compliance 30, and 3 CXR quadrants. Today it's PF ratio 260, PEEP 8, compliance 50, and 2 CXR quadrants — calculate today's LIS so I can compare for weaning progress."},{"title":"Research cohort lung injury scoring","prompt":"For a study patient: 4 chest radiograph quadrants with alveolar consolidation, PaO2/FiO2 ratio of 85, PEEP 18 cm H2O, compliance 15 mL/cm H2O — run the Murray 1988 LIS calculation and give me the numeric score and category."}],"resultDescription":"Returns the computed Lung Injury Score (LIS) as a numeric mean of the four component scores (each 0–4), plus a severity classification: 'none' (LIS = 0), 'mild_moderate' (0 < LIS ≤ 2.5), or 'severe' (LIS > 2.5).","failureModes":["Missing required query parameters (chest_radiograph_quadrants, pf_ratio, peep_cm_h2o, compliance_ml_cm_h2o) returns a validation error","PF ratio outside valid range (20–800) may return an input validation error","PEEP value outside range (0–40) may return an input validation error","Compliance outside range (5–200) may return an input validation error","chest_radiograph_quadrants not an integer 0–4 returns schema validation error","Payment failure via x402 protocol returns 402 with payment details"],"whenToPreferThis":"Use this endpoint when you need a fast, deterministic computation of the Murray 1988 Lung Injury Score from four caller-supplied clinical values. It is not a Berlin ARDS diagnostic tool and does not interpret imaging or issue ventilator orders — it strictly performs the arithmetic scoring defined by Murray 1988. Prefer it over manual calculation when building clinical decision-support pipelines, research data pipelines, or EMR-integrated agents that need programmatic LIS computation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T13:06:12.772Z","isFirstParty":false}