Health

Alveolar Ventilation Calculator (VA)

Calculate VA = (VT − VD) × RR in L/min. VD may be supplied or estimated as ~2 mL/kg body weight. Normal resting ~4–6 L/min; low → hypercapnia, high → hypocapnia. Derived from West, LITFL, StatPearls, and Radford 1955. Not medical advice.

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Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'http://127.0.0.1:3003/en/api/tools/alveolar-ventilation-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"vt":500,"rr":12,"vd":150,"bodyWeight":0,"decimalPlaces":1}'

API reference

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

Endpoint

HTTP

POST http://127.0.0.1:3003/en/api/tools/alveolar-ventilation-calculator

Parameters

Name	Type	Required	Description
vt	number	Yes	Tidal volume per breath (mL).
rr	number	Yes	Respiratory rate (breaths per minute).
vd	number	No	Anatomical dead space per breath (mL). If omitted, estimated from body weight (~2 mL/kg).
bodyWeight	number	No	Body weight (kg). Used to estimate VD (~2 mL/kg) when VD is not provided.
decimalPlaces	number	No

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-alveolar-ventilation-calculator": {
      "name": "alveolar-ventilation-calculator",
      "description": "Calculate VA = (VT − VD) × RR in L/min. VD may be supplied or estimated as ~2 mL/kg body weight. Normal resting ~4–6 L/min; low → hypercapnia, high → hypocapnia. Derived from West, LITFL, StatPearls, and Radford 1955. Not medical advice.",
      "baseUrl": "http://127.0.0.1:3003/mcp/sse?toolId=alveolar-ventilation-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": "alveolar-ventilation-calculator",
    "arguments": {
  "vt": 500,
  "rr": 12,
  "vd": 150,
  "bodyWeight": 0,
  "decimalPlaces": 1
}
  }
}

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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