diabetes edutool: tutorial 1 food and insulin. introduction during these tutorials, the individual...
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Diabetes Edutool: Tutorial 1
Food and insulin
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Introduction
During these tutorials, the individual effects that can affect the blood glucose will first be explained separately
The effects will then be combined to explain how all of them together will affect the blood glucose, as in real life
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When we eat, our bodies break the starches in food down into a simple sugar called
glucose
Glucose
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The glucose is first absorbed into our bloodstream
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Our bloodstream moves the glucose around our bodies
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Our bodies use the glucose for energy
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All the glucose absorbed after a meal cannot be used at once
The body must store some for later
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Glucose
Insulin
To store glucose, the body produces the hormone insulin
Insulin works like a key that unlocks the door of our cells to let the glucose in
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Our pancreas makes insulin
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In some people the pancreas is not able to make insulin
This condition is called type 1 diabetes
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Without insulin, the excess glucose in our blood cannot be stored
This causes high blood glucose levels
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High blood glucose can damage your body
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To prevent this, people with type 1 diabetes inject insulin when they eat
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Food, stress and exercise change our blood glucose levels
We must first learn more about this, before working out how much insulin to use
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We call one equivalent teaspoon of sugar, one
= 11
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Using for food makes energy calculation of food easy
= 3
= 3 = 8
= 10
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The more we eat, the higher our blood glucose rises
3 108
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When we stress, our blood glucose also rises
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We also use to see how much energy we expend during exercise
≈ 20Running for one hour
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The more we exercise, the lower our blood glucose goes
10 5 15
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BLOOD GLUCOSE
We need to balance food and stress with exercise and insulin
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To show you how, we will use Diabetes Edutool
It shows you how the blood glucose of people with type 1 diabetes changes
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The oval shape in the middle shows the blood glucose level
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The colour of the oval means:
Blood glucose normal
Blood glucose too high or too low
Blood glucose slightly high or slightly low
Blood glucose5 mmol/L
Blood glucose14 mmol/L
Blood glucose4 mmol/L
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Let’s look at an example:
Arnold has type 1 diabetes
What happens to his blood glucose after…
How much insulin will he need?
+
?
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Before we start, we must first measure Arnold’s blood glucose level
It is 5 mmol/L
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To set the starting glucose level, click on the + or – sign in the oval
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Arnold starts off with a normal blood glucose level of 5 mmol/L
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To add the we use the database
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This arrow went up to show the eaten
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The blood glucose is now high
This is what Arnold’s blood glucose would be if nothing was done
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To add the we again use the database
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The blood glucose is now very high
Again, this is what Arnold’s blood glucose would be if nothing was done
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If Arnold had taken some insulin before the meal, it would store the excess glucose and
prevent his blood glucose from rising
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To do this, we need insulin
To store the excess glucose Arnold needs to take some insulin
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Insulin removes excess glucose from the blood by storing it elsewhere
With meals, we need enough insulin to maintain blood glucose levels in a normal range
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To add the insulin, we drag the insulin arrow to the right until the blood glucose is normal
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Let’s recap… 1 – We increase the insulin
Insulin arrow
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2- The insulin stores the glucose
Energy stored arrow
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3 - The blood glucose decreases as the glucose is stored
Blood glucose is lowered
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Let’s see the insulin in action again:
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The blood glucose is now normal again
11 units of insulin were needed to maintain Arnold’s blood glucose within a normal range
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Question:
Arnold starts off with a blood glucose level of 7 mmol/L
He plans to….
for 30 minutes
How much insulin will he need?
+
?
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Set the blood glucose level to 7 mmol/L
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Use the database to add the cake and exercise
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Drag the insulin arrow to lower his blood glucose to 5 mmol/L
7 units of insulin were needed
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Lessons:
- Starchy foods are broken down into glucose that is absorbed into the blood
- The body uses glucose for energy
- Insulin is needed to unlock the cells in our bodies to let the glucose in
- Food and stress increase blood glucose while insulin and exercise decrease it
-- End of Tutorial 1 --