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Your Glucose Meter Number?


Jun 5, 2011

Dance Number for Your Diabetes Score

A few months ago, I had the privilege of traveling to Australia to present at a conference of athletes with diabetes.  During the meeting, prizes were awarded to everyone who scored exactly 5.5 mmol/L (99 mg/dL) on their glucose meter. You should have seen it! Anyone who measured close to 5.5 was testing again and again, hoping for that magic number to pop up. Fingers were suffering, but the test strip manufacturers were making out like bandits.

Most of us have a number that we consider "ideal."  Mine is 100 on the nose.  Any time I hit 100, I do a little celebratory dance that probably elicits rain somewhere in the desert.  The target that we choose is actually very important in intensive diabetes management.  Whenever you take mealtime insulin and make a "correction" dose adjustment for highs and lows, your target blood sugar comes into play.  Set a target that's too high, and you increase your risk for short- and long-term health problems.  Set a target that's too low, and you set yourself up for frequent and potentially severe bouts of hypoglycemia.  Set a target that's a range instead of a number, and you're going to increase the variability of your blood sugars.  

So what is the best target?

Blood sugar targets, like most aspects of diabetes management, should be individualized.  Setting the right target is all about balancing risks and benefits.  We all know that tight control is a good thing, but we have to balance it against the risk of hypoglycemia.  

For most of my clients, I like to start with a target BG of 120 mg/dL (6.7 mmol/L) and then adjust in 10 - 20 mg/dL (.5 - 1 mmol/L) increments based on the following individual risk factors:


Raise Target For:

+ Hypoglycemia unawareness

+ History of severe lows

+ High-risk work

+ Unstable angina

+ Living alone

 

Lower Target For:

- Elevated A1c

- Pregnancy

- Feeling unwell with modestly elevated BG

- Fighting complications or infection

- Use of CGM with low alert turned on


Sometimes, the decision might be influenced by several factors at one time.  We raise, lower, raise, lower, and wind up right back where we started.  But that's OK, as long as the target chosen represents a good balance between benefit and risk.

In terms of using a target "range" (which is an option with many insulin pumps), my recommendation is don't.  When correcting to a range rather than to a specific number, you increase the chances that your next reading will be too high or too low.  Ranges are for evaluating your control, not for determining a correction dose.

For example, if you correct your highs down to 160 (9) and your lows up to 80 (4.5), you are less likely to be within the range of 80 - 160 (4.5 - 9) the next time you check than if you corrected your highs and lows to exactly 120 (6.7).  Using a sports analogy (which is about all I know), correcting to a range is like an archer aiming for the outer edges of the target.  But correcting to an exact target number is like aiming for the bull's eye.  It's obvious who is going to win that contest.  

So if you want to be on-target more often, give some serious thought to how you set your blood sugar target.  And when you hit yours exactly, do a little dance.  There are places that really need the rain.

 
Editor's Note:  Gary Scheiner is a Certified Diabetes Educator with a private practice, Integrated Diabetes Services, near Philadelphia.  He also serves as "Dean" of Type-1 University, a web-based school of higher learning for insulin users, offering live and prerecorded courses on a variety of topics.  Gary and his staff provide diabetes management and education services via phone and the Internet for children and adults worldwide. 


Categories: , A1c Test, Blood Glucose, Complications & Care, Diabetes, Diabetes, Hypoglycemia, Intensive Management, Meal Time Insulin



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