Pneumeric CEO and Chief Medical Officer Johnathon Aho grew up in the shadow of the Mayo Clinic in Rochester, Minnesota, but it wasn't until he began studying engineering at Michigan Tech that he decided he wanted more in his life than writing code. So he pivoted to medicine, returned to Mayo, and in 2017 developed Capnospot, a visual detection device for treating collapsed lungs. We talk about why the usual therapy (listening for a gush of air from the chest cavity) fails as much as half the time, his 20 or so patents, Midwestern frugality, and why so much of a physician's life involves dealing with human goop.