here`s a starter..

Doctor Doctor, can u help me , I keep thinking I`m a bird.

Dont worry, just perch over there and i`ll tweet u in a minute !

The oldies are the goodies http://www.ahajokes.com/kdoc01.html
or there is always the other old one about doctors: -
A List of Things You Don't Want to Hear During Surgery:

Oops!
Has anyone seen my watch?
Come back with that! Bad Dog!
Wait a minute, if this is his spleen, then what's that?
Hand me that...uh...that uh.....thingy
What do you mean he wasn't in for a sex change!
Damn, there go the lights again...
Everybody stand back! I lost my contact lens!
Well folks, this will be an experiment for all of us.
What do you mean, he's not insured?
Let's hurry, I don't want to miss "Bay Watch"
What do you mean "You want a divorce"!
FIRE! FIRE! Everyone get out!
Regards,
K-BIKE