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BloodSugarAnalyser

A Windows application for analysing Dexcom Clarity blood sugar export files.

This program analyses exported files from the Dexcom Clarity web application and compiles information and values not provided by Dexcom Clarity. For example, it calculates your EBS value.

Excessive Blood Sugar (EBS)

What is EBS?

When you use your Dexcom CGM, you choose a target range you want to keep your blood sugar within. 4 to 10 mmol/L is a common target range. Sometimes your blood sugar exceeds your top target limit. The EBS is the area between your top glucose limit and your actual glucose values for the time when the top target limit is exceeded.

Why is EBS useful?

In Dexcom Clarity you can see how much of your time you spent exceeding your top target limit, but you can't see with how much. Two hours at 16 mmol/L counts as much as two hours at 10,1 mmol/L, even though the former is much worse. EBS on the other hand will show you a value of 12 hmmol/L (milli-mole hours per liter, an unintuitive unit for area in a 2-dimensional system with glucose and time as axes) for the first high and 0,2 hmmol/L for the second high, indicating how bad the highs really were.

How to download Dexcom Clarity export files

Disclaimer! Dexcom Clarity is an external application I have no control nor any responsibility for. Ask them, not me, for help if you fail to download the export files.

  1. Go to https://clarity.dexcom.eu/
  2. Select "Dexcom Clarity for Home Users".
  3. Log in.
  4. Click on "Reports" in the topmost menu.
  5. Click on "Export".
  6. Select the preferred time interval and click "Export".
  7. An export file is downloaded. It has a name like "CLARITY_Export_Testsson_Kalle_001_2019-07-12_093810.csv".
  8. Done

How to download Freestyle Libre export files

Disclaimer! Instructions below are for Swedish users. You will find your version in a similar way. Also, see the disclaimer for Clarity export files!

  1. Go to the Freestyle Libre website for your country, http://www.freestylelibre.com/
  2. Select "Kundservice" (Customer Service) in the menu.
  3. Under "Produkter" (Products) you'll find "Programvara" (Software). Click it.
  4. Under "Nedladdning" (Download), select "Dataprogram" (Data Software).
  5. Select your version, Mac or PC (take PC if you're unsure).
  6. Run the downloaded file and install it by following the instructions given.
  7. Open the installed Freestyle Libre software.
  8. Follow any instructions given by the software.
  9. Connect your Freestyle Libre reader to your computer with an USB cable.
  10. Wait for the software to recognise the reader and follow any of its instructions.
  11. Click "Arkiv" (Archive) in the menu.
  12. Select "Exportera data" (Export data).
  13. Select a filename for the export file and save the file to disk.
  14. Done.

How to run the analyser

  1. Open the BloodSugarAnalyser program.
  2. Select the previously exported file.
  3. Click "Analyse File".
  4. Done!