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Insulin Therapy
By Catherine Murphy, RN
Not every diabetic has to take insulin as part of his or her
treatment plan. Those people who have been diagnosed with Type I
Diabetes must take insulin each day because their body is not
manufacturing the needed insulin necessary to live.
How does the doctor select the type of insulin you will need? Well,
the selection process takes several things into account. They
include information about your body such as weight, and build. The
degree of physical activity you normally have and your usual daily
food intake is also considered. In addition to your current state of
health, both emotional and physical the doctor will need to look at
other factors like what medications you may be taking. All of these
factors will play a large part in determining the correct type of
insulin for you.
Often people who require insulin must take two shots a day, and
careful monitoring of blood sugar levels is important to ensuring
the correct amount of insulin is administered. It is not unusual for
people to require more than one type of insulin to control their
blood levels.
There are various types of insulin available and just as many
delivery options for the diabetic today. The doctor based on the
different actions of each type and its duration carefully evaluates
types and delivery methods. Because not everyone responds in the
same way, it may be necessary to try several types of insulin before
the right one you for is determined.
Types of Insulin
The different types of insulin are classified by how long they take
to act. There is fast acting, slow acting prolonged duration or very
slow acting and rapid acting or very fast acting.
Here is a list of the types of insulin commonly used:
Ultra Short-Acting Insulin: HUMALOG
Short-Acting Insulin: Regular (R) and Semilente (r) (S).
These preparations start and stop working more quickly
than other types of insulin.
Intermediate-Acting Insulin: NPH (N) and Lente(r) (L).
These insulins take longer to start working and work
longer than short-acting insulins.
Long-Acting Insulin: Ultralente(r) (U). This insulin
starts acting slowly and last the longest.
Combination Insulins: 70/30 insulin contains 70 percent
NPH and 30 percent Regular insulin, so the Regular
begins working quickly, and the NPH takes over when the
Regular is stopping. 50/50 insulin has equal parts of
the two preparations.
When you are ready to give an injection it is important
to select the right location for the shot. There are a
wide variety of site on your body that you can use
including your abdomen, thighs, buttocks, and upper
arms. Some of these sites will get the insulin into your
body faster than others, and this can affect your blood
sugar. That is why it is important to talk with your
doctor about which are the best sites for you to use.
How fast your body absorbs the insulin is important
because it helps to reliably predict the effect of each
dose of insulin. It is best to keep a consistent site
for each time of day and the type of insulin you are
using. Here is a breakdown of the common sites and how
the absorption time is for each site.
· Thighs – Slow absorptionn
· Upper Arms – Medium absorption
· Abdomen – Fast absorption
· Buttocks – Slow absorption
It is a good idea to rotate the sites where you are
injecting insulin. Rotating helps prevent the skin from
toughening and affecting absorption. It is best to have
a set plan for rotating the sites. You may find it
easiest to always use only the abdomen and rotate sites
within the area of the abdomen. If you think of the area
of your abdomen as a clock, you could rotate from 1
o’clock to 11 o’clock, starting farthest out from the
navel and moving progressively closer in toward the
navel. If you want to include arms and thighs in the
rotation, you should be sure to inject in the same area
at the same time each day. For example, take your
morning injection in the abdomen, your afternoon
injection in the thigh or arm, and your evening
injection in the buttocks. When rotating injection sites
on a limb or the abdomen, make the first injection
within the appropriate area and then separate subsequent
injection sites by about a finger's width.
Always be sure to discuss any plan of care with your
doctor, or health care manager. When you work together,
you will be able to formulate a plan of care that works
best for your individual needs..
Resources: Research for this article was complied
through resources at the Joslin Diabetic Center in
Boston, Mass. and the American Diabetic Association
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