sweaty hands, AST accuracy

John898

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Hi,

New to the forum, and to diabetes. I have an accu-chek mobile device, but am finding it gives different readings throughout the day if I measure my forearm as opposed to my finger, the blood from my arm is usually ~6-7mmol/L while that from my finger is 8-9mmol/L. I've tested first thing in the morning, before meals and after meals and it;s always different by ~2mmol/L. I have sweaty palms (palmer hydrosis) and so most of the time can't test my fingertips at all, and so have been relying on my forearm readings. But now I'm concerned that these have not been accurate and that my blood sugar has been consistently 2mmol/L higher than I thought.

I'm washing my hands pretest, and they aren;t visibly sweating, but could some microscopic sweat be getting mixed in? Is their glucose in sweat? I'm confused by the different readings and would appreciate any advice, which reading do I believe?
 

JohnEGreen

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@daisy1

Hi John898 welcome to the forum I have tagged daisy1 who will post some information for you

I found this on Accu-chek's web site

It's important to know that while blood from your fingertip can be tested at any time, there are times when alternate site testing may not give you the most accurate result.

When it's okay—and not okay—to check from alternate sites
Alternate site testing should only be used when blood sugar is stable:

Immediately before a meal
When fasting
Near bedtime
Always check from your fingertip, however, when blood sugar may be changing:

Following a meal, when blood sugar is rising quickly
After exercise
Whenever you think your blood sugar might be low or falling
Important alternate site testing notes
If you're considering alternate site glucose testing, please remember:

Never ignore the symptoms of low or high blood sugar.
If the results of a blood glucose test don't match the way you feel, confirm with a fingertip test. If the fingertip result still doesn't seem to reflect the way you feel, get in touch with your healthcare professional.
Please talk to your healthcare professional before using sites other than your fingertip for testing blood sugar.

John
 

John898

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Hi John, thanks for the reply. Yes I'm aware of that info, it's the (constant) discrepancy of ~2mmol/L that's bugging me. I actually tested the meter on a friend just now (who as far as I know is not diabetic) and she also had a 2mmol/L difference between finger and forearm depsite not having eaten in 4 hours.
 

JohnEGreen

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Puzzling it could be an error of the meter as meters do vary a lot and are not always more accurate than 15 or 20 percent.
Or it could be that there is a variance in the samples taken from one site than another you can also have varying results from two samples from the same site and sometimes from the same droplet of blood .

As for sweat containing glucose yes it does

There is an article on this site.

http://www.diabetes.co.uk/news/2015...-levels,-bypass-finger-pricking-98468951.html
 

daisy1

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@John8

Hello John and welcome to the forum :) Here is the information, mentioned above, that we give to new members and I hope you will find it useful. Ask more questions and someone will be able to help.

BASIC INFORMATION FOR NEWLY DIAGNOSED DIABETICS

Diabetes is the general term to describe people who have blood that is sweeter than normal. A number of different types of diabetes exist.

A diagnosis of diabetes tends to be a big shock for most of us. It’s far from the end of the world though and on this forum you’ll find over 150,000 people who are demonstrating this.

On the forum we have found that with the number of new people being diagnosed with diabetes each day, sometimes the NHS is not being able to give all the advice it would perhaps like to deliver - particularly with regards to people with type 2 diabetes.

The role of carbohydrate

Carbohydrates are a factor in diabetes because they ultimately break down into sugar (glucose) within our blood. We then need enough insulin to either convert the blood sugar into energy for our body, or to store the blood sugar as body fat.

If the amount of carbohydrate we take in is more than our body’s own (or injected) insulin can cope with, then our blood sugar will rise.

The bad news

Research indicates that raised blood sugar levels over a period of years can lead to organ damage, commonly referred to as diabetic complications.

The good news

People on the forum here have shown that there is plenty of opportunity to keep blood sugar levels from going too high. It’s a daily task but it’s within our reach and it’s well worth the effort.

Controlling your carbs

The info below is primarily aimed at people with type 2 diabetes, however, it may also be of benefit for other types of diabetes as well.
There are two approaches to controlling your carbs:

  • Reduce your carbohydrate intake
  • Choose ‘better’ carbohydrates

Reduce your carbohydrates

A large number of people on this forum have chosen to reduce the amount of carbohydrates they eat as they have found this to be an effective way of improving (lowering) their blood sugar levels.

The carbohydrates which tend to have the most pronounced effect on blood sugar levels tend to be starchy carbohydrates such as rice, pasta, bread, potatoes and similar root vegetables, flour based products (pastry, cakes, biscuits, battered food etc) and certain fruits.

Choosing better carbohydrates

Another option is to replace ‘white carbohydrates’ (such as white bread, white rice, white flour etc) with whole grain varieties. The idea behind having whole grain varieties is that the carbohydrates get broken down slower than the white varieties –and these are said to have a lower glycaemic index.
http://www.diabetes.co.uk/food/diabetes-and-whole-grains.html

The low glycaemic index diet is often favoured by healthcare professionals but some people with diabetes find that low GI does not help their blood sugar enough and may wish to cut out these foods altogether.

Read more on carbohydrates and diabetes

LOW CARB PROGRAM:
http://www.diabetes.co.uk/low carb program


Eating what works for you

Different people respond differently to different types of food. What works for one person may not work so well for another. The best way to see which foods are working for you is to test your blood sugar with a glucose meter.

To be able to see what effect a particular type of food or meal has on your blood sugar is to do a test before the meal and then test after the meal. A test 2 hours after the meal gives a good idea of how your body has reacted to the meal.

The blood sugar ranges recommended by NICE are as follows:

Blood glucose ranges for type 2 diabetes
  • Before meals: 4 to 7 mmol/l
  • 2 hours after meals: under 8.5 mmol/l
Blood glucose ranges for type 1 diabetes (adults)
  • Before meals: 4 to 7 mmol/l
  • 2 hours after meals: under 9 mmol/l
Blood glucose ranges for type 1 diabetes (children)
  • Before meals: 4 to 8 mmol/l
  • 2 hours after meals: under 10 mmol/l
However, those that are able to, may wish to keep blood sugar levels below the NICE after meal targets.

Access to blood glucose test strips

The NICE guidelines suggest that people newly diagnosed with type 2 diabetes should be offered:

  • structured education to every person and/or their carer at and around the time of diagnosis, with annual reinforcement and review
  • self-monitoring of plasma glucose to a person newly diagnosed with type 2 diabetes only as an integral part of his or her self-management education

Therefore both structured education and self-monitoring of blood glucose should be offered to people with type 2 diabetes. Read more on getting access to bloodglucose testing supplies.

You may also be interested to read questions to ask at a diabetic clinic

Note: This post has been edited from Sue/Ken's post to include up to date information.
 

Brunneria

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As a type 2 I would pick a site (the highest one) and stick with it.
The goal (for T2s testing) is to look at trends, reactions to particular foods and portions. The numbers themselves are of limited importance. The reason I would deliberately go for the site showing me the high readings is because I want to know if there are any problems, if a food has raised my bg higher than I want - and then I want to address it. If I chose a site that consistently tested lower, I would be lulling myself into a false sense of security, and probably eat too much of foods my body can't tolerate.

Having said that, if you are T1 (your profile doesn't say), then accuracy is far more important because of calculating insulin doses. Worth bearing in mind that almost all of us use fingertips, so they are the consensus 'standard'.
 
C

catherinecherub

Guest
The fingertips and the palm hold the most recent 'memories' of your blood glucose. Fingertip and palm testing tell you what your blood glucose level is right now.

On the other hand, lagging test sites such as the forearm or thigh tell you what your blood glucose was around 20 to 35 minutes ago - not what it is right now. That difference can be crucial if your blood glucose is dropping fast --- a forearm test might tell you that the level is fine, because the forearm is a lagging test site, while a fingertip test correctly alerts you to a low number. Because of this, lagging test sites cannot replace the fingertip or palm completely for any person.
https://www.bd.com/us/diabetes/blood-glucose-monitoring/how-to-test/alternate-site/
 

JohnEGreen

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On the other hand, lagging test sites such as the forearm or thigh tell you what your blood glucose was around 20 to 35 minutes ago
Thanks for that info was unaware of that will remember that.
 

JohnEGreen

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@John898 I know this may sound obvious but have you tried Antiperspirants such as Drysol which you apply at night and wash off in the morning which may give you a period when you could test.

John
 

John898

Newbie
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3
Okay, so I guess my meter is just broken. It isn't giving a delayed reading from the forearm, it's giving a completely different, independent reading to my finger. And not just on me, on my friend too.
 

JohnEGreen

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You are using the AST Cap on the finger pricker I take it?