Haha, blimey :)
I train medical staff on those sorts of computer systems. A while back I was training a room full of junior doctors. One of them was looking. Through a list of available specimen types and exclaimed loudly

"What the hell is 'sputum'?!"

A whole room of people (me included) looked at him incredulously and chorused "saliva!" :)
(Professor Kenny Martin Hmm? What?, Wed 17 Mar 2010, 13:54, 1 reply)

Which is not what sputum is....!

( sm.pl.crt.rs I don't fucking know, do I?, Wed 17 Mar 2010, 16:36, closed)

Oh noes!
The chorusing of "saliva" must have only happened in my head then! The incredulous looks were definitely real though - and I'm pretty sure a qualified doctor should know what it is...

...what is it then?
(Professor Kenny Martin Hmm? What?, Thu 18 Mar 2010, 0:31, closed)

you're close
but if you're being picky about things, saliva is fairly thin and runny and produced in salivary glands in your mouth, whereas sputum is the thick gloopy stuff you tend to cough up from your lungs when you're sick.
(xanthine, Thu 18 Mar 2010, 6:35, closed)