Patient
Information
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Guide
Modern
allergy tests make life a lot easier.
Allergy symptoms are responsible for more visits
to the doctor’s office than any other single disease in
this country. Over 40 million Americans (about 1 in 5) suffer
from one or more of the allergic diseases. Allergies are considered
a leading cause of school absenteeism, too. Fortunately, your
doctor has a wide range of innovative testing and treatment techniques
to make dealing with allergies a lot easier than before.
Early allergy discoveries.
Allergy as a recognizable illness is nearly
as old as the history of modern man. However, it was not until
1966 that the exact mechanism for the disease was discovered.
Researchers found that some people produce a "skin sensitizing
antibody" called IgE (for Immunoglobulin E).
Allergic patients inherit the tendency to produce
an overabundance of IgE when exposed to allergens such as dust,
ragweed and grass pollens.
What causes an allergic reaction?
A typical allergic reaction happens in the following
way:
1. Allergens enter the body
by: being inhaled as with pollens, dust and animal dander, swallowed
as with food or medicine, or injected as with penicillin or
bee stings.
2. If you are allergic, your
body may overreact, causing excess production of IgE.
3. Upon further exposure, the allergen binds with the IgE antibody
and causes certain cells in your body to release histamine-like
substances. These substances cause the allergic symptoms you’re
familiar with, such as: watery eyes, sneezing, congestion, runny
nose and rashes.
How allergies are diagnosed.
Accurate diagnosis of your allergy is key to
successful treatment. In order to determine the specific allergens
responsible, your physician will take the following steps:
History:
Reviewing history can establish how and when
the symptoms appear, whether they are seasonal or year-round,
and whether they can be associated with any particular activity,
place or exposure.
Physical exam:
Your physical examination will focus on the
eyes, ears, nose, sinuses, throat, lungs, skin and gastrointestinal
tract. Results of the exam will be more informative if performed
"in season," or while the symptoms are at their peak.
Testing:
Until the discovery of IgE, the skin test
was the major diagnostic tool for allergies. With this method,
approximately 50 to 200 tiny scratches, pricks, or needle sticks
are made - usually on the upper back or arm - with small amounts
of suspected allergens. After an appropriate time period (10-30
minutes), the skin is observed for any reaction.
New, improved In Vitro tests - RAST, IMMUNO
CAP & 3gAllergy
™
Soon after the IgE antibody was discovered,
researchers began to work on a new kind of test, generally referred
to as RAST. Today, after years of clinical testing, RAST, ImmunoCap,
and 3gAllergy™ are all FDA-approved procedures used to help doctors identify
the cause of your allergy.
A small part of your blood sample is mixed with
different allergens and observed for a chemical reaction. The
laboratory’s equipment and computers analyze the reaction
and measure the amount of IgE for each allergen. Results are grouped
into classes from zero (negative) to six (high positive). Your
doctor will discuss the importance of these results with you.
The advantages of INVITRO ALLERGY testing:
Convenient.
Since a single blood sample is used to test
for many allergens, and serum is stored for later testing, fewer
patient visits are required. It is easier to subject children
to one needle stick for a blood test than multiple needle sticks
for skin testing.
Safe.
RAST measures only IgE, and is not affected
by any medications you may be taking.
Dependable.
Strict laboratory procedures are followed
to provide precise and accurate results. In vitro allergy testing is a very sensitive method of testing. It can detect even mild allergies.
We’re here to help.
This office has the newest diagnostic testing
and treatment procedures available to put to work for you. We’ll
perform the appropriate tests, and provide helpful hints to help
make living with allergies a lot easier.
Treatment.
Some allergies do disappear or moderate with
time or treatment, but most patients require continuing treatment
in order to maintain a symptom-free life. Your doctor can prescribe
a treatment program for you that will relieve or eliminate much
of your discomfort.
You may also discover you can solve your problem
simply by avoiding those things that trigger your allergy. If,
for example, you are allergic to eggs, you avoid eating
eggs.
Many allergens, such as pollen and dust, are
unavoidable and require specific treatment. Many symptoms can
be controlled by drugs such as antihistamines or cortisone.
Your doctor might also prescribe immunotherapy
- allergy shots. In this procedure, small doses of the offending
allergen are injected into the body over a period of time, gradually
building up the body’s tolerance to that allergen.
A new alternative to shots are allergy drops,
also known as sublingual immunotherapy. They are safe and
effective and offer the convenience of taking them at home.
Whatever treatment your doctor prescribes,
it’s important to continue your treatment on a regular basis.
Trust your doctor and stay with the program.
FAQ's
Will this test accurately demonstrate
whether I have allergies or not?
Absolutely! This laboratory test has been FDA
accepted for years. It measures your antibodies to the picogram.
Doctors from around the world, including the US military, hospitals,
clinics, universities and other labs order this test.
What if I think I have food allergies?
There was a study done by the National Institutes
of Health citing this test as possibly the best available test
to determine food allergy.
Can I test for chemicals that I’m
exposed to at work?
Probably. We can test for several hundred chemicals
and occupational allergens found in the workplace.
Does my doctor know about these tests?
These tests have been around for many years.
Your doctor is probably well aware of them.
Will my insurance cover these tests?
Most people are covered through their insurance,
including Medicare. To be sure, we recommend you check with your
company first.
How can I get this test performed on
me?
We will be happy to send you information
about these tests, as well as provide you with the supplies your
doctor will need to get your blood sample to us. There is a nominal
fee to cover shipping. Please call our toll free number (800)
222-5775 for details.