Health metrics

ctx.HEALTH_CALCULATOR works out an adult health metric in code and places it in a range. Each method takes its own input. It is a screening, not a diagnosis.

Methods

Method	Input	Returns
`bmi`	`{ heightCm, weightKg }`	`{ bmi, category, source }`
`bloodPressure`	`{ systolic, diastolic }`	`{ category, urgency, source }`
`restingHeartRate`	`{ bpm }`	`{ category, note }`
`breathingRate`	`{ breathsPerMinute }`	`{ category, note }`
`oxygenSaturation`	`{ percent }`	`{ category, note }`
`alcoholUnits`	`{ volumeMl, abvPercent }`	`{ units, formula, note }`

Categories

Method	`category`
`bmi`	`"underweight"`, `"healthy_weight"`, `"overweight"`, `"obesity"` (CDC adult bands)
`bloodPressure`	`"normal"`, `"elevated"`, `"high_blood_pressure_stage_1"`, `"high_blood_pressure_stage_2"`, `"hypertensive_crisis_range"` (American Heart Association)
`restingHeartRate`	`"very_low"`, `"low"`, `"typical_resting_range"`, `"high"`, `"very_high"`
`breathingRate`	`"very_low"`, `"typical_adult_resting_range"`, `"mildly_high"`, `"high"`
`oxygenSaturation`	`"typical_range"`, `"lower_than_expected"`, `"urgent_range"`

Returns


{
  bmi: 27.4,
  category: "overweight",
  source: "CDC adult BMI categories; BMI is a screening measure and not a diagnosis.",
}

Use it


import { workflow } from "@loops/sdk";
 
type Measurements = { heightCm: number; weightKg: number };
 
export const bmiWorkflow = workflow<Measurements>({
  id: "bmi-check",
  execute: async ({ step, event }) =>
    step.do("Calculate BMI", ({ ctx }) =>
      ctx.HEALTH_CALCULATOR.bmi({
        heightCm: event.body.heightCm,
        weightKg: event.body.weightKg,
      }),
    ),
});

What it won’t invent

The ranges are adult ranges. Alcohol units are UK units (millilitres × ABV% ÷ 1000), which vary by country. Readings in an urgent range come back with a note to seek care, not a diagnosis.