Hello, I am vice-champion in an international robotics competition , I can do your project and help you understand how it works.
However, I think we can build an android/IOS app that will do what you want to do and have a better display of the data.
I have a better idea , why don't we use the codeBar of the medecin to track it through time , and what I mean by that is that we build an arduino based project which will store data in an SD card or on a Server (computer) and once it reads the codeBar of the medecin it gives you all the information about it, I think that is easier to use for your dad.
Please contact me so we could discuss this further. Thank you for your interest