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magent EVendo Score (Dong 2019)
x402
magent EVendo Score (Dong 2019) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Calculates the Dong 2019 EVendo score to screen for high-risk esophageal varices using lab values and ascites status in US conventional units
Price / call$0.005
Success—
StatusUnknown
How this service works
Dong 2019 EVendo score for screening high-risk esophageal varices. A = (8.5 * INR) + (AST/35); B = (platelets/150) + (BUN/20) + (hemoglobin/15); score = A/B + 1 if ascites. US conventional units. Round to 2 decimals. Published cutoff strictly below 3.90. magent clamps: INR 0.8-4.0, AST 5-4000 U/L, platelets 10-800 k/uL, BUN 2-150 mg/dL, hemoglobin 4-20 g/dL. Not a varices diagnosis or endoscopy order. magent does not assay labs. Not a medical device.
Output
Returns the EVendo score rounded to 2 decimal places, computed as A/B (plus 1 if ascites), where A = (8.5 × INR) + (AST/35) and B = (platelets/150) + (BUN/20) + (hemoglobin/15). Input values are clamped to physiologically valid ranges. A score strictly below 3.90 indicates lower risk per the published cutoff. The result is a numerical screening output only, not a diagnosis or endoscopy order.
Example use cases
Pre-endoscopy varices risk triage
“My cirrhosis patient has INR 1.8, AST 120 U/L, platelets 60 k/µL, BUN 22 mg/dL, hemoglobin 9.5 g/dL, and ascites present — what's their Dong 2019 EVendo score and does it exceed the 3.90 high-risk cutoff?”
Outpatient hepatology follow-up screening
“Can you run the EVendo score for a patient with INR 1.1, AST 45 U/L, platelets 180 k/µL, BUN 14 mg/dL, hemoglobin 13.8 g/dL, no ascites? They're coming in for a routine hepatitis C follow-up and I want to assess esophageal varices risk.”
Automated EHR scoring for variceal surveillance
“For my patient with INR 2.1, AST 200 U/L, platelets 50 k/µL, BUN 30 mg/dL, hemoglobin 8.0 g/dL, and clinically evident ascites, please compute the Dong 2019 EVendo score to help decide whether to prioritize endoscopic surveillance.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/evendoWhen to prefer
Use this endpoint when you need a fast, non-invasive Dong 2019 EVendo score for esophageal variceal risk stratification from standard lab values in US conventional units. Prefer this over manual formula calculation when automating hepatology workflows or integrating into EHR pipelines. Not suitable for diagnosis, endoscopy ordering, or when SI units are the source format without prior conversion.
Side effects
- Non-positive or out-of-range lab values rejected (INR must be 0.8–4.0, AST 5–4000 U/L, platelets 10–800 k/µL, BUN 2–150 mg/dL, hemoglobin 4–20 g/dL)
- Missing required query parameters return an error
- Incorrect units (e.g. SI instead of US conventional) will produce incorrect scores silently
- Boolean ascites field sent as string instead of true/false may cause a parsing error
- Payment failure (402) if x402 USDC payment header not included
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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