An
ultrasound is the interpretation of reflected sound waves to form
a picture of the fetus. 2D ultrasound (sometimes referred to as
"traditional" ultrasound) has been safely used in obstetrics for
over 35 years.
2D
ultrasound works by “listening” to sound waves in a single plain.
The ultrasound is directed straight down and reflected back up
again. Think of it as being able to virtually slice a loaf of
bread. The resulting black and white image is similar to looking
at the face of a slice of bread.
3D
ultrasounds work by a different process known as "surface rendering".
In this case, the same sound waves used in 2D are sent down –
this time at different angles. These reflections are interpreted
through sophisticated software, and a 3D image of the fetus is
instantly created. Using the same "bread" analogy as before, the
surface of the loaf is now being examined from the outside. Surface
details can now be visualized with remarkable clarity.
4D
ultrasound is captured in the same manner as 3D ultrasound. Instead
of looking at a single still image (3D), you are now able to view
live “video” of the fetus in the womb (4D).
Many
3D/4D ultrasound centers have recently opened, providing affordable
elective ultrasounds to expectant families. This has drawn criticism
from several organizations. But if the equipment is regulated,
and the practice of ultrasound for prenatal care has a good safety
record … where’s the problem?
Some
doctors are concerned that their patients will opt to get too
many unnecessary ultrasounds. But if the argument of ultrasound
safety was simply based on overall exposure, then a good follow-up
question would be: “If increased ultrasound exposure is a cause
for concern, then why do higher-risk pregnancies typically receive
so many?”
Other
doctors are understandably concerned that mothers will use these
elective ultrasounds in lieu of an ultrasound prescribed by their
physicians. They are also concerned that a technician may try
to present diagnostic information that should only be interpreted
by a board-certified physician.
An
elective ultrasound should only be used to complement the ultrasound
sessions prescribed by a physician. A full-anatomical study should
always be completed first to identify any potential prenatal issues.
The parents-to-be can then utilize the elective session as an
insightful, bonding experience.
Expectant
mothers nationwide are seeking elective ultrasounds because they
feel it will have a positive impact during their pregnancy. Recent
studies have shown that viewing an ultrasound can cause marked
improvement in maternal health habits. Studies presented at an
American Institute of Ultrasound in Medicine (AIUM) meeting have
even supported that 3D ultrasounds will positively influence parents
bond with their babies.
Mothers
tend to improve their diets, exercise more, and eliminate harmful
behaviors such as smoking or drinking. Other ultrasound benefits
may also include increased paternal involvement, family support,
empathy, and appreciation.
Although
there are plenty of entertaining aspects to a 3D/4D ultrasound,
safety and professionalism should always remain paramount when
choosing a provider. A responsible ultrasound provider will require
proof that the client is seeing a healthcare provider for prenatal
care. Proof should also be required that the mother-to-be has
already completed a full-anatomical, second-trimester ultrasound
study.
The
provider should use the system’s obstetric mode to keep within
FDA-established levels for frequency and power for prenatal use.
They should also limit the actual scan time to less than 25 minutes
per session. A session must be immediately suspended if anything
adverse is discovered, and all findings should be directly reported
to the mother’s healthcare provider.
Remember
that word-of-mouth is usually the best method of referral amongst
expectant mothers. Many sonographers and technicians tend to forget
that this is a special moment during a mother’s pregnancy. So
do your homework, and ask around. The best ultrasound experience
will be the culmination of the nicest facility, the best equipment,
and a professional, caring staff.
Editorial
provided by Joseph J. Psiuk, Owner/Operator of InnerView
Ultrasound, Frazer, PA.
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