I see this gadget four days a year and every time I do I think of a particular Monty Python sketch, https://youtu.be/tKodtNFpzBA. It does go bing! quite a lot.
This is an infusion pump, and another example of how desperate I am for material. I have rheumatoid arthritis. Now, no poor baby stuff. A rheumatologist friend says with a smirk that there's never been a better time in history to get RA. This stuff is called Rituxan. I have two IV cycles a year, six months apart. It took a few hours yesterday and then repeat in two weeks. I sit in a plush recliner, listen to music and edit pictures. Been doing it for 20 years and it works. My fingers are kinda crooked but there is full range of motion and no pain.
And it goes bing! every time the flow rate needs changing or there's an air bubble in the line.