Justin Delgado is husband to Kacie Doyle-Delgado, diagnosed at age 11. After more than a decade together, he considers himself to be an expert carb counter and Dexcom inserter. He graduated with his Master of Science in Finance from the University of Utah in 2013 and has been working in commercial banking since then. He attended his first Friends for Life conference in 2015 and is looking forward to volunteering with the teens.
July 3, 2000
Blood Tests and Insulin Injections
Question from Denver, Colorado, USA:
With all the questions about the differences between whole blood glucose values and plasma values, why is it so difficult to get a chart with normal plasma values? Whenever someone asks about the subject, they seem to be given a conversion formula and not a chart with a range like I've always had with whole blood readings.
Plasma glucose is about 15% higher than whole blood glucose. Labs have used plasma glucose for a long time: decades.
Meters used to use whole blood glucose; but now, every new meter introduced in the past 3-4 years is calibrated to plasma glucose. That way, the numbers are more like the lab. It’s not perfect though. Remember your meter costs only a few dollars, not thousands of dollars like lab instruments.
Why are there no charts: beats me! One might argue, just use the old chart; the blood glucose control will be better. Actually I do tell my patients about the low end of the spectrum, the 50s and 60s, and then let them be a bit lower in the high range.