My husbands doctor does a test that he calls the "coke and a donut" glucose test.

The doc has the patient come into the office in the morning to do a fasting glucose test, then the doc sends the patient next door to this little coffee shop to have a large coca-cola and a glazed donut.

Then the patient comes back to the docs office a hour after eating/drinking to get a second glucose test. If the reading show any possible problems, then the doc sends the patient to the hopsital lab for the official glucose testing.

The doc says the reason he started his "coke and a donut" test was because he was tired of sending patients to the hospital lab to sit for 3 hours unless it is absolutely necessary.... especially because our hospital lab is insanely busy and the lab's waiting room is also the ER waiting room --- so going there means being near all those sick people waiting to be seen in the ER.

So the doc started doing the coke and a donut test to save his patients time and money and to save them from getting ER germs.