Handheld Diagnostic Device
By Xander Nowell
The first handheld diagnostic device was made in 2003. The first handheld diagnostic device was first used to count red and white blood cells before and during the space mission for the mission to Mars. It was used to see if the astronauts were health by counting their red and white blood cells. This particular device was low mass so it was easy to carry around. This device is now used for medical uses to count the red and white blood cells. There were no changes made to the design of it when it was first used for everyday life.
This is a modern day diagnostic device that some doctors use.