Health

TPN Macronutrient Calculator (Glucose/AA/Lipid)

Calculate glucose/amino-acid/lipid delivery (grams and kcal), total and non-protein calories, the non-protein kcal:g nitrogen ratio and per-kg values from a parenteral nutrition prescription. Energy densities: dextrose 3.4 kcal/g, AA 4.0 kcal/g, lipid 20% ≈ 2.0 kcal/mL. Targets (ASPEN/ESPEN): 20–30 kcal/kg/day, protein 1.0–1.5 g/kg/day. This is a prescription-analysis aid, not a compounding recipe. Derived from ASPEN 2016, ESPEN 2019, McClave 2016, Mirtallo 2004. 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/tpn-macronutrient-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"weight":70,"dextrosePercent":25,"dextroseVolume":1000,"aaPercent":8.5,"aaVolume":500,"lipidEmulsion":"20%","lipidVolume":250,"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/tpn-macronutrient-calculator

Parameters

Name	Type	Required	Description
weight	number	Yes	Patient weight in kg — used for per-kg kcal, protein, glucose-infusion-rate and lipid ceilings.
dextrosePercent	number	Yes	Dextrose concentration % w/v. D25W = 25 g/100 mL.
dextroseVolume	number	Yes	Total dextrose volume (mL).
aaPercent	number	Yes	Amino-acid concentration % w/v. AA 8.5% = 8.5 g/100 mL.
aaVolume	number	Yes

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-tpn-macronutrient-calculator": {
      "name": "tpn-macronutrient-calculator",
      "description": "Calculate glucose/amino-acid/lipid delivery (grams and kcal), total and non-protein calories, the non-protein kcal:g nitrogen ratio and per-kg values from a parenteral nutrition prescription. Energy densities: dextrose 3.4 kcal/g, AA 4.0 kcal/g, lipid 20% ≈ 2.0 kcal/mL. Targets (ASPEN/ESPEN): 20–30 kcal/kg/day, protein 1.0–1.5 g/kg/day. This is a prescription-analysis aid, not a compounding recipe. Derived from ASPEN 2016, ESPEN 2019, McClave 2016, Mirtallo 2004. Not medical advice.",
      "baseUrl": "http://127.0.0.1:3003/mcp/sse?toolId=tpn-macronutrient-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": "tpn-macronutrient-calculator",
    "arguments": {
  "weight": 70,
  "dextrosePercent": 25,
  "dextroseVolume": 1000,
  "aaPercent": 8.5,
  "aaVolume": 500,
  "lipidEmulsion": "20%",
  "lipidVolume": 250,
  "decimalPlaces": 1
}
  }
}

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