Mystery Medical Device - Device 1

How much of a medical devices expert are you?Are you a medical devices design expert? Let's see if you can figure out what the following devices are. Each is either a component of a finished device or an actual medical device. Each has been cropped to just reveal a small portion of the entire image. Take a guess, and then click through to the full image to see if you were right. Four or five out of five would qualify you for expert status. Three would be the average. If you get lower than that, you might want to wait for the next gallery.