The 3D Printed Sneezometer is a spirometer designed by University of Surry researchers to tackle lung problems before they occur. Being the cheapest and most-sensitive, it can measure speed of sneeze and measure lung capacity, helping to diagnose lung diseases like Asthma and Sleep apnoea.
Source: http://www.medicalplasticsnews.com/news/3d-printed-sneezometer-helps-asthma-patients-breathe-easy/