One way valves, check valves, or non-return valves - whatever terminology you use, they are quite a common features of medical devices. They are usually inexpensive but if they fail to operate as designed the consequences can be disastrous.

Uson has a new blog post describing the leak testing of one way valves using a Sprint iQ leak tester and a downstream pressure sensor. The company has a downloadable application note for members of the Uson Literature Club. To read the blog post go to where you will find instructions on how to join the literature club and download the application note.