Monthly Archives: March 2014

EWD.js: Application, Web Service and REST Security

As soon as you venture into the world of browser-based and Web Services-based architectures, you quickly realise that, unless you think things through very carefully, it’s a potential security nightmare.  You’re exposing databases containing sensitive data to the equivalent of the Wild West: a multitude of people who are apparently hell-bent on causing havoc either […]

Disrupting Healthcare IT

Before I begin, for the benefit of those of you who are new to the world of Health IT, let me explain one bit of the jargon: EHR: An Electronic Healthcare Record – in other words, a computer system designed for managing and recording information relating to the treatment of patients within hospitals and/or community […]

VistA: The Open Source EHR Hackable Platform

Dr Tony Shannon, in his presentations on NHS VistA, has often remarked that what is needed is an Open Source, hackable Electronic Healthcare Record (EHR) platform.  If such a platform became available, packaged in a such way that any interested Open Source developer (or, dare I say, hacker) could fire it up, dig into it […]

EWD.js and VistA: Adding a JavaScript Terminal

In this final article in the series on the integration of EWD.js and VistA using Christopher Edwards’ OSEHRA Installer, I want to introduce what I believe is a critically important new component: a JavaScript-based VT-100 terminal emulator that can run within a browser.  This is integrated with a back-end Node.js module that acts as a […]

EWD.js and VistA: REST interface

This article is the fourth in the series that describes the EWD.js / VistA environment that is created by running Christopher Edwards’ OSEHRA installer.  In this article I’m going to focus on the REST interface that will have been installed and made ready for use, and show how it makes use of the same back-end […]

EWD.js & VistA: A technical deep-dive into the VistA Demo Application

In the previous article I explained how to install EWD.js and VistA using Christopher Edwards’ OSEHRA installer, and showed you how to start up the VistA Demonstration application in a browser. In this article I’ll take a deep dive into this application and show you how EWD.js is used to integrate with VistA. EWD.js Configuration […]

EWD.js and VistA: Let’s get started!

In my previous article I introduced the new installer for VistA and EWD.js that has been created by Chris Edwards from OSEHRA.  In this article I’m going to explain how to use the installer to get started with EWD.js and VistA on an Amazon EC2 virtual machine. Chris’s OSEHRA installer was primarily designed to work […]