Diabetic Labs: what are those every 3 month tests for?

Every 3 months, you should have a test done called a glycohemoglobin A1c, or glyco for short.

This is a test that tells us what your average (mean, actually, if you are savvy about statistics) blood sugar has been over the prior 2-3 months.

What it actually is is a measurement of glucose (blood sugar) molecules that have become stuck to hemoglobin molecules in your bloodstream. Hemoglobin is the large molecule in your red blood cells that helps to pick up and deliver oxygen to your organs.

Naturally, the normal number is not zero since you'd have to have no blood sugar or no hemoglobin!

People without diabetes have a glyco between 4.0 and 6.0, where 5.0 is an average blood sugar of 100.

If you have diabetes, this test result would be higher because your blood sugar is higher than it should be.

The glycohemoglobin test is useful because it tells us how well controlled your blood sugars have been over a 2-3 month period around the clock and not just at times you check it or the morning you go to the lab. Here is a table that shows how high your average sugar is depending on your glyco test result. A rule of thumb is add 40 points for every 1.0 above a test result of 5.0.

The American Diabetes Association recommends a glyco of under 7.0, however endocrinologists (specialists in gland disorders, including diabetes) recommend under 6.5.

I recommend this lower goal of under 6.5, too.

Under 7.0 does reduce your chances of diabetes causing damage to small blood vessels and causing blindness, nerve pain, kidney failure, erectile dysfunction (male impotence) and circulation problems to your feet.

However, getting the glyco under 6.5 accomplishes this and also prevents damage to larger blood vessels and thereby reduces your chances of having a cardiac arrest, heart attack or stroke. I think it's worthwhile going for the brass ring here, as long as efforts to do so are not causing problems with hypoglycemia or medication side-effects.

As to that computer print-out you get at the lab, do not worry about it!

• It is not a bill, and signing it does not mean MediCare or your insurance will bill you. (If you don't believe this, read the fine print carefully and think like a contract lawyer while you're doing it.)
  
• MediCare covers glyco tests every 90 days for stable well-controlled diabetes. When they say 90 days, they mean it so do know when was the last one so you can avoid this problem. Feel free to ask, too.
• If your diabetes is not well-controlled as your doctor defines it, then MediCare will pay for glyco tests more frequently than every 90 days.
• We are very careful to make sure that your lab forms reflect this, so that if we instruct you to get tests done more frequently, this will not result in a billing problem for you.
• Bear in mind that the lab simply generates a form any time they are asked to do any test for any reason where MediCare may have a time limit! THIS IS NOT THE SAME THING AS BEING TOLD YOU WILL BE BILLED. THIS IS COMPUTER-GENERATED PAPERWORK!

End of rant ; . )