Ask HN: What is the most impactful thing you've built?
I&#x27;ve developed an application that presents information about a patient&#x27;s circulatory system to anaesthetists during surgery to give them clearer information about the patients heart and vasculature so that they can make finer grained, individualised treatment decisions. There&#x27;s currently only a small group of users, as we haven&#x27;t been able to afford to go through clinical trials yet, but the evidence is mounting that it is getting patients through surgery with fewer complications and better prospects of a full fast recovery. I&#x27;ve been in the theatre and watched someone wake up after a 9 hour surgery and instantly be alert enough to say they&#x27;d like a cup of tea, which the anaesthetist attributed to the decisions he was able to make informed by the software. It seems as if it has already had an significant positive impact on the health of the people treated by anaesthetists using the software.  If further studies support the anecdotal evidence from our users, the software might have a significant impact on millions of people.