There are always more tests if you have
diabetes. One test that you will receive or should be given every
time you visit the doctor is the blood pressure (BP) test. This
non-laboratory test is an indicator of your heart activity, health,
and potential artery problems.
Blood pressure (also termed
hypertension) is measured as systolic (upper) and diastolic (lower)
pressures. BP numbers are usually written as 120/80 mmHg (120
systolic over 80 diastolic millimeters of mercury). Systolic means
the pressure when the heart beats while pumping blood and diastolic
means the pressure when the heart is a rest between heartbeats.
The table below shows normal blood pressure numbers for adults. It
also shows which numbers put you at greater risk for health problems.
Categories
for Blood Pressure Levels in Adults (measured in millimeters of
mercury, or mmHg)
Category |
Systolic (top number) |
|
Diastolic (bottom number) |
Normal
|
Less than 120
|
And
|
|
Prehypertension
|
120–139
|
Or
|
|
High blood pressure
|
|
|
|
Stage 1
|
140–159
|
Or
|
|
Stage 2
|
160 or higher
|
Or
|
100 or higher
|
The ranges in the table apply to most adults (aged 18 and older)
who do not have short-term serious illnesses.
High blood pressure, is a persistent
elevation in blood pressure that taxes the heart and can, over time,
cause damage to organs such as the kidneys, brain, eyes, and heart.
BP is the amount of force blood exerts on the walls of the arteries
and veins. BP depends on the force and rate of the contraction of the
heart as it pumps oxygenated blood from the left ventricle
(compartment) of the heart into the arteries and the resistance to
that flow. The amount of resistance depends on the elasticity and
diameter of the blood vessels and how much blood is flowing through
them.
Blood pressure is dynamic; it rises and
falls depending on a person’s level of activity, time of day, and
physical and emotional stresses. In healthy people, it is largely
controlled by the autonomic nervous system but is also regulated by
hormones, including:
Angiotensin II — produced by the
kidneys, it causes increased resistance in blood vessels.
Aldosterone — produced by the
adrenal glands in response to angiotensin II, it affects the amount
of sodium, potassium, and fluids excreted by the kidneys.
Catecholamines — such as
epinephrine, also called adrenaline, produced by the adrenal glands
in response to stress and increases heart rate and resistance in
blood vessels.
When one or more of the regulating
factors is not able to respond appropriately to the demands of the
body, then the pressure of the blood may become persistently
increased.
With diabetes you should schedule
yourself or an annual eye exam. Retinopathy is what the eye doctor
should be monitoring. Normally your doctor will advise you to have
this done. The purpose is to establish a baseline early to help
determine if retinopathy is happening or progressing. Retinopathy is
caused by the rupture of small blood vessels in the eye and over time
causes dimming of sight and eventually blindness. This is a major
reason for managing diabetes and maintaining excellent blood glucose
levels. BP levels can also have an effect.
Another exam that needs to happen is a
hearing test. This will also develop a baseline for future tests to
determine if there is hearing loss happening. Small blood vessels in
your inner ear can be damaged by high blood glucose levels and over
time will rupture and cause hearing loss. It is important to
maintain excellent blood glucose levels and BP readings.
Many people and even doctors forget
about establishing a baseline for the thyroid gland by giving a TSH
test. People with all types of diabetes may develop thyroid
problems. The test is also known as Thyrotropin with the formal
name of Thyroid-simulating Hormone. Related tests include T4, T3,
Thyroid Panel, Thyroid Antibodies. The reason to have the test is to
screen for and help diagnose thyroid disorders - to monitor treatment
of hypothyroidism and hyperthyroidism. This test may be given
anytime you have blood drawn and some medications can affect the
results so it is important that you tell your doctor about all
medications and supplements you are taking. For more information see
this web site.
A person may develop hyperthyroidism
when TSH levels are increased. Symptoms include rapid heart rate,
weight loss, nervousness, hand tremors, irritated eyes and difficulty
sleeping. If TSH levels decrease, hypothyroidism may develop.
Symptoms include weight gain, dry skin, constipation, cold
intolerance, and fatigue. Thyroid diseases may alter thyroid hormone
levels regardless of the amount of TSH present in the blood.
If you are taking metformin, know that
the B12 test is important because metformin does deplete the level of
vitamin B12. If you obtain a lot of B12 from the food you are
eating, B12 supplements may not be necessary. All persons that have
been on metformin for any length of time should ask for the B12 test.
Generally once a year is sufficient unless there are problems and
then it may be done more often by your doctor.
A high coronary artery calcium (CAC)
score is known to be a strong indicator of coronary heart disease.
This test is becoming more important in the analysis of heart disease
in everyone, but since people with diabetes are even more at risk for
heart disease, this could be especially important for people with
diabetes. Persons with diabetes are twice as likely to develop heart
and vascular disease. About 60 percent of diabetes patients are
likely to die from a vascular event. Read
this article about CAC.
One last item is to obtain copies of
all tests to allow you to track the results. You may see something
that your doctor misses and by charting the results, this will give
you a good insight into your own health and show favorable and
unfavorable trends.
Part 4 of 4. This concludes the lists
of tests for people with diabetes discussion. There are always
others tests for other conditions.