A new piece of medical equipment is being tested right now called the Pedisedate. Basically, it is a headset that is placed on a child before they are admitted to surgery. The device connects to a Game Boy or portable CD player (yup, not a Nintendo DS or iPod — apparently the Pedisedate also transports you to 1996) and a snorkel-like piece swings forward and is placed over the child’s nose. As the kid plays videogames or listens to music, nitrous oxide, an anesthetic gas, is emitted through the snorkel and puts the child to sleep.
Its probably not possible to access the anaestesia device via an analog audio jack. The anastesia control and the device are completely separate.
I was looking at the picture and the headset and device were both the same purple, which made me think it was “all one thing.”