Safer Insulin: Critical Care Insulin Calculator

This respository houses the website and underlying module code for an insulin infusion rate calculator currently being evaluated.

The website is live at https://saferinsulin.org

It is provided to medical professionals for use at their own discretion: preparing the requirements for CE marking is underway and the tool has been used successfully in the Greater Manchester Critical Care Network.

Technicals

Building and deploying a mirror

This is positively encouraged, as it gives resiliance to the availability of the calculator. To build:

• ensure yarn installed
• clone repository
• run npm install
• run npm run build
• the website will be in the dist/ folder, the app version ready to be packaged with Phonegap Build (or other Cordova-based toolset) will be in the app/ folder
• if using Phonegap Build, npm run zip will prepare the app for upload

NPM module for calculator component

The module can be used within a node.js project by installing from npm: npm install insulin-calc or by including the browserified module dist/js/insulin-calc.js in a web project.

The following placeholder code should demonstrate how the functions are intended to be called and their parameters:

/* Instantiate a calculator object */
var calc = require('insulin-calc')

/* Get a starting rate of insulin infusion */
var glucose = 17.2    // current glucose reading in mmol/L
var result = calc.startingRate(glucose)
console.log('New rate:', result.rate)
console.log('Advice:', result.advice)
console.log('Governance hex code:', result.hex)

/* Get a new rate of infusion when patient is already on insulin infusion */
var current = 12.1    // current glucose reading in mmol/L
var previous = 14.2   // previous glucose reading in mmol/L
var rate = 3          // current insulin infusion rate in ml/hr
var result = calc.ongoingRate(current, previous, rate)
console.log('New rate:', result.rate)
console.log('Advice:', result.advice)
console.log('Governance hex code:', result.hex)

/* Check a governance code */
var result = calc.governance('0d7-a82820')
console.log('Function ID used:', result.function)
console.log('Date generated:', result.date)
console.log('Parameter passed:', result.current)

The 'functions IDs' in the object returned by the governance code function are:

Function	Version	name(params)
a	1.x.x	startingRate(currentGlucose)
b	1.x.x	ongoingRate(currentGlucose, previousGlucose, currentRate)

As future iterations of this project evolve, the intention is that previous versions of the algorithm are preserved to ensure governance codes can always be checked.