High schooler invented color-changing sutures to detect infection
At first I was kind of skeptical because detecting pH has been done for decades (and quite easily) - but her methodology for keeping the dye on the suture was really smart just in general. One thing that would make this really viable is if she could make the color change a bit more extreme. Personally red and dark purple are really hard to tell apart for some people, especially for detecting something as a surgical infectionl.