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HAS-BLED Score (Major Bleeding Risk)

Calculate the HAS-BLED score to estimate major bleeding risk in patients on oral anticoagulation (most commonly combined with CHA₂DS₂-VASc in atrial fibrillation). Each component scores 1 point: Hypertension (uncontrolled, systolic BP >160), Abnormal renal function (dialysis/transplant/Cr >2.26 mg/dL), Abnormal liver function, prior Stroke, prior major Bleeding/predisposition, Labile INR (TTR <60% on warfarin), Elderly (age >65), Drugs (antiplatelet/NSAID), Alcohol (≥8 drinks/week). Range 0–9 (renal/liver and drugs/alcohol can each contribute up to 2). Interpretation: 0 low, 1–2 moderate, ≥3 high risk — regular review and correct reversible factors; a high score alone does NOT justify withholding anticoagulation. Derived from Pisters 2010 (Chest) and the 2023 ACC/AHA/ACCP/HRS AF guideline. The 'labile INR' criterion mainly applies to warfarin users; predictive value is lower for DOACs. Not medical advice.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/has-bled-score' \
  -H 'Content-Type: application/json' \
  -d '{"hypertension":true,"renal":false,"liver":false,"stroke":false,"bleeding":false,"labileInr":true,"elderly":true,"drugs":true,"alcohol":false}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP
POST https://api.elysiatools.com/en/api/tools/has-bled-score

Parameters

NameTypeRequiredDescription
hypertensioncheckboxNoUncontrolled hypertension, systolic BP > 160 mmHg. +1.
renalcheckboxNoChronic dialysis, renal transplant, or serum Cr > 2.26 mg/dL (>200 µmol/L). +1.
livercheckboxNoChronic hepatic disease, or bilirubin > 2× ULN with AST/ALT/ALP > 3× ULN. +1.
strokecheckboxNoPrior stroke history. +1.
bleedingcheckboxNo

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json
{
  "mcpServers": {
    "elysiatools-has-bled-score": {
      "name": "has-bled-score",
      "description": "Calculate the HAS-BLED score to estimate major bleeding risk in patients on oral anticoagulation (most commonly combined with CHA₂DS₂-VASc in atrial fibrillation). Each component scores 1 point: Hypertension (uncontrolled, systolic BP >160), Abnormal renal function (dialysis/transplant/Cr >2.26 mg/dL), Abnormal liver function, prior Stroke, prior major Bleeding/predisposition, Labile INR (TTR <60% on warfarin), Elderly (age >65), Drugs (antiplatelet/NSAID), Alcohol (≥8 drinks/week). Range 0–9 (renal/liver and drugs/alcohol can each contribute up to 2). Interpretation: 0 low, 1–2 moderate, ≥3 high risk — regular review and correct reversible factors; a high score alone does NOT justify withholding anticoagulation. Derived from Pisters 2010 (Chest) and the 2023 ACC/AHA/ACCP/HRS AF guideline. The 'labile INR' criterion mainly applies to warfarin users; predictive value is lower for DOACs. Not medical advice.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=has-bled-score",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call
{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "has-bled-score",
    "arguments": {
  "hypertension": true,
  "renal": false,
  "liver": false,
  "stroke": false,
  "bleeding": false,
  "labileInr": true,
  "elderly": true,
  "drugs": true,
  "alcohol": false
}
  }
}

© 2026 Elysia Tools. Developer documentation.

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Prior major bleeding or predisposition to bleeding. +1.
labileInrcheckboxNoUnstable/high INRs or time-in-therapeutic-range < 60% on warfarin. +1. Mainly applies to warfarin users.
elderlycheckboxNoAge > 65 years. +1.
drugscheckboxNoConcomitant antiplatelet agent or NSAID use. +1.
alcoholcheckboxNoExcess alcohol intake (≥ 8 drinks/week). +1.

Response format

JSON result

JSON
{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

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