Health

Cardiac Index Calculator (CI)

Compute CI = CO / BSA with BSA from the Mosteller formula √(height × weight / 3600). Normal 2.5–4.0 L/min/m². Derived from Mosteller NEJM 1987, Du Bois 1916, StatPearls, LITFL. 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/cardiac-index-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"co":5,"height":175,"weight":75,"decimalPlaces":2}'

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/cardiac-index-calculator

Parameters

Name	Type	Required	Description
co	number	Yes	Cardiac output in L/min (from thermodilution, Fick, or echo).
height	number	Yes	Patient height in centimeters, used to compute BSA via Mosteller.
weight	number	Yes	Patient weight in kilograms, used to compute BSA via Mosteller.
decimalPlaces	number	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

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-cardiac-index-calculator": {
      "name": "cardiac-index-calculator",
      "description": "Compute CI = CO / BSA with BSA from the Mosteller formula √(height × weight / 3600). Normal 2.5–4.0 L/min/m². Derived from Mosteller NEJM 1987, Du Bois 1916, StatPearls, LITFL. Not medical advice.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=cardiac-index-calculator",
      "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": "cardiac-index-calculator",
    "arguments": {
  "co": 5,
  "height": 175,
  "weight": 75,
  "decimalPlaces": 2
}
  }
}

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]

Browse tools Open tool

Name

Type

Required

Description

number

Yes

Cardiac output in L/min (from thermodilution, Fick, or echo).

height

number

Yes

Patient height in centimeters, used to compute BSA via Mosteller.

weight

number

Yes

Patient weight in kilograms, used to compute BSA via Mosteller.

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-cardiac-index-calculator": { "name": "cardiac-index-calculator", "description": "Compute CI = CO / BSA with BSA from the Mosteller formula √(height × weight / 3600). Normal 2.5–4.0 L/min/m². Derived from Mosteller NEJM 1987, Du Bois 1916, StatPearls, LITFL. Not medical advice.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=cardiac-index-calculator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "cardiac-index-calculator", "arguments": { "co": 5, "height": 175, "weight": 75, "decimalPlaces": 2 } } }