Health

Blood Oxygen Content Calculator (CaO₂ / CvO₂)

Compute CaO₂ = 1.34×Hb×SaO₂ + 0.003×PaO₂ and (if mixed-venous values supplied) CvO₂, a-v difference, extraction ratio, DO₂, VO₂. Derived from Hüfner 1894, West, StatPearls, LITFL, Leach 2002. Not medical advice.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'http://127.0.0.1:3003/en/api/tools/oxygen-content-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"hemoglobin":15,"sao2":0.97,"pao2":100,"svo2":0,"pvo2":0,"co":0,"decimalPlaces":2}'

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/oxygen-content-calculator

Parameters

Name	Type	Required	Description
hemoglobin	number	Yes	Hemoglobin concentration (g/dL).
sao2	number	Yes	Arterial oxygen saturation as a fraction (0–1).
pao2	number	Yes	Arterial PO₂ (mmHg) from ABG.
svo2	number	No	Mixed venous O₂ saturation (0–1). If provided with PvO₂, the tool computes CvO₂ and a-v O₂ difference.
pvo2	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-oxygen-content-calculator": {
      "name": "oxygen-content-calculator",
      "description": "Compute CaO₂ = 1.34×Hb×SaO₂ + 0.003×PaO₂ and (if mixed-venous values supplied) CvO₂, a-v difference, extraction ratio, DO₂, VO₂. Derived from Hüfner 1894, West, StatPearls, LITFL, Leach 2002. Not medical advice.",
      "baseUrl": "http://127.0.0.1:3003/mcp/sse?toolId=oxygen-content-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": "oxygen-content-calculator",
    "arguments": {
  "hemoglobin": 15,
  "sao2": 0.97,
  "pao2": 100,
  "svo2": 0,
  "pvo2": 0,
  "co": 0,
  "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]

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