Reason for different blood glucose values in left and right hand
Almost everytime I measure the blood glucose levels in both right and left hands there's always a difference of 10-20mg/dL. When I first noticed this, I tried using on different individuals, but for everyone the right and left hands had a minimum of difference of 10mg/dL. Using a glucometer of a different company still gave the same results of differences in both hands.
So why is there is a difference between right and left hand blood glucose values?
I couldn't find any satisfactory reason on the net.
Also if there is this significant difference then with which value should we go with? The lower value or the higher value?
Not only me but a lot of people has found this difference. When I searched the net this question is quite common.
If any of you has a glucometer if you may experiment and let me know the results.
I also talked to some doctors. They agreed to have this difference but couldn't give me a possible reason for this.
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I'm not aware that capillary blood glucose levels have been systematically examined but interstitial fluid glucose levels in one study using a Freestyle Libre Pro appeared to show higher levels in the dominant arm whereas one might expect the increased muscle bulk on the dominant arm to extract more glucose. Another possibility is that if there is increased muscle bulk in the dominant arm, and insulin resistance relates to muscle bulk, then levels of glucose would then be expected to be higher in the dominant arm.
One test would be to see if there is any difference between the two legs and there should not be.
A total of 1920 time matched left-arm and right-arm pairs were analyzed. The right arm was greater than the left arm 96.0% of the time (Figure 1). The average glucose readings for the right and left arms were 96 ± 16 mg/dL (range 68-186) and 88 ± 15 mg/dL (range 57-174), respectively (P ? .001). The minimum and maximum changes in the right arm relative to the left arm were ?11 and 41 mg/dL respectively. In the right arm, 2.19% of the values were outside the 70-140 mg/dL range compared to 4.58% in the left arm (P ? .001). In 14.1% of cases, the right arm was greater than the left arm by 15% or more. There is no correlation between the magnitude of intra-arm differences and glucose levels (R2 < .09).
Differences in Glucose Levels Between Left and Right Arm europepmc.org/article/pmc/pmc6610604
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