Winter's Formula (expected PaCO₂)

Expected respiratory compensation in metabolic acidosis.

How to use

Call with the inputs below. Boolean inputs are optional (absent = false). Returns the value, an interpretation, and a breakdown. Deterministic — no network call.

Parameters

Name	Type		Description
bicarbonate	number	required	Serum bicarbonate (HCO₃) — unit: mEq/L
measured_paco2	number	optional	Measured PaCO₂ (optional) — unit: mmHg

Example input

{
  "bicarbonate": 14,
  "measured_paco2": 30
}

Example output

{
  "calculator": "Winter's Formula (expected PaCO₂)",
  "category": "Pulmonary",
  "value": "29 mmHg (±2)",
  "interpretation": "Expected PaCO₂ 27–31 mmHg for appropriate respiratory compensation. Measured is within range → appropriate compensation.",
  "severity": "low"
}

Call it (MCP tools/call)

{
  "method": "tools/call",
  "params": {
    "name": "calc_winters_formula",
    "arguments": {
      "bicarbonate": 14,
      "measured_paco2": 30
    }
  }
}

Endpoint: POST https://clinical-mcp.mcharge.in/mcp (Streamable HTTP).