When (anybody's) blood sugar is low, it affects them. I don't always notice, because I'm often unaware of 'hypos'. But often I feel suddenly tired.

I've long suspected that I also feel sudden tiredness when my blood sugar levels are changing suddenly, (up or down) even if I'm still in a 'normal' range.

This morning I felt a sudden onset of tiredness as I was doing some reading for work. I noticed my Descom G4 showed that I was 5.6mmol/l (a normal reading), but falling. The next time I looked I was 4.3 (still normal) but still falling. I could see where this was going, so I ate some sweets - and took a photo of the meter. The next reading was 3.6 (a low reading) and then 3.3, ... it look about 20 minutes before I came back to a normal level. It was one of those cases where with the benefit of 20/20 hindsight I should have avoided going low, but it's hard to get it right every time. The question that interests me is: Can I prove my theory that I felt tired before I went low?

Not quite, not this time.

  • The Dexcom readings are only taken every five minutes - so I might already have dropped low.
  • The Dexcom reads interstitial fluids (liquid between cells) rather than blood, and this lags behind proper 'blood glucose'.

The next time the Dexcom shows I'm on a downward slope and I'm feeling tired, I need to do a standard blood glucose test to see if I'm still in a normal range (rather than photograph the Dexcom!). With a combination of the Dexcom and one or two standard Blood Glucose tests I look forward to being able to prove or disprove my theory once and for all!

Image:Crash Bang!


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Anthony Holmes May 27th, 2013 11:18:54 AM

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