I came across this thread on google and I could not help but to reply. I just wanted to give you guys an insight as to what we use them for.
We use this keyboard everyday in our Cardiology unit at a Hospital. These keyboards are part of a wider haemodynamic (ECGs, Arterial Blood Pressure) system called PRUCA where I work. We specifically use them in Cath lab (Coronary Artery stenting and Electrophysiology studies).
Those yellow keys are used to change a Label on our screen. They represent where the catheter is going in the heart as it moves around and the different blood pressure morphologies. For example: Aorta, Right Atrium, Left Atrium, Pulmonary Artery etc. All these pressures are show in a wave format and can be hard to decipher, which is why we change the label as we go along in a procedure.
The big red emergency button is used to instantly start saving a study whenever a dangerous/irregular/no heart rhythm or pressure can be seen. It will save everything from the live screen and display it on our second review screen.
I'm not really a keyboard enthusiast and I do not know much about them. However, I do love typing on this keyboard and the firm clicks. I find it easier to type on this keyboard when I am recording information quickly in an emergency situation as compared to a membrane based keyboard.
A replacement keyboard may or may not cost somewhere along the lines of $1000 AUD brand new.