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Sunday, April 26, 2009

About your Exam - Ultrasound Safety

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About your Exam - Ultrasound Safety
What You Should Know About Your Ultrasound Examination
Your doctor has requested an examination...of one or more organs using ultrasound. Although you may have heard about ultrasound or possibly been examined with ultrasound in the past, you may still have questions about your examination. The American Institute of Ultrasound in Medicine (AIUM) - an association of doctors, sonographers, and scientists - has compiled information for this brochure to help answer some commonly asked questions.

What Is Ultrasound?
Ultrasound is like ordinary sound except it has a frequency (or pitch) higher than humans can hear. When sent into your body from a transducer (probe) resting on your skin, the sound is reflected off internal structures. The returning echoes are received by the transducer and converted by an electronic instrument into an image on a monitor, similar to a television screen. These continually changing images can be recorded on videotape or film. Diagnostic ultrasound imaging is commonly called sonography or ultrasonography.

Who Will Perform the Examination?
The examination is usually performed by a specially trained health care professional called a sonographer. A series of images will be recorded by the sonographer. These images will then be interpreted by a doctor. In some cases, you may be examined by a doctor to confirm or resolve uncertain findings.

Will the Ultrasound Exam Hurt?
There is no pain involved in an ultrasound examination, although you may experience some pressure or discomfort when having a sonogram of certain parts of your body. During the scanning procedure, a gel is applied over the area to be examined and a transducer is placed on your skin or, for certain examinations, inserted into your vagina or rectum. The gel may feel cool. It is water soluble and usually wipes off easily, but it is a good idea to wear clothing that is easily washable.

When and How Is Ultrasound Used?
There are many medical indications for using diagnostic ultrasound. Pregnancy is probably the most widely recognized reason to have an ultrasound exam, often called a sonogram. There are, however, many organs in the body that can be examined with ultrasound. The liver, gallbladder, kidneys, spleen, thyroid, breasts, ovaries, uterus, and prostate are a few examples.

Is Ultrasound Safe?
There are no known harmful effects associated with the medical use of sonography. Widespread clinical use of diagnostic ultrasound for many years has not revealed any harmful effects. Studies in humans have revealed no direct link between the use of diagnostic ultrasound and any adverse outcome. Although the possibility exists that biological effects may be identified in the future, current information indicates that the benefits to patients far outweigh the risks.

The AIUM has a Bioeffects Committee that meets regularly to consider safety issues and evaluate reports dealing with bioeffects and the safety of ultrasound.

A United States Food and Drug Administration (FDA) report1 states that ultrasound has been used for many years with no obvious detrimental effects. Nevertheless, current evidence is considered insufficient to justify an unqualified acceptance of ultrasound safety. The FDA report recommends that ultrasound be used only when a diagnostic benefit is likely, and that exposure should be limited to that required to produce the needed information.

The World Health Organization (WHO) of the United Nations, in its report on ultrasound,2 recommends prudence in ultrasound exposure to human subjects but agrees that benefits outweigh any presumed risks. The WHO report states that patients should be examined with ultrasound only for valid clinical reasons.

With regard to ultrasound scanning during pregnancy, the FDA states that "ultrasonic fetal scanning is generally considered safe and is properly used when medical information on a pregnancy is needed. But ultrasound energy delivered to the fetus cannot be regarded as completely innocuous. Laboratory studies have shown that diagnostic levels of ultrasound can produce physical effects in tissue, such as mechanical vibrations and rise in temperature. Although there is no evidence that these physical effects can harm the fetus, public health experts, clinicians, and industry agree that casual exposure to ultrasound, especially during pregnancy, should be avoided. Viewed in this light, exposing the fetus to ultrasound with no anticipation of medical benefit is not justified."3

In conclusion, based on experimental and epidemiological data, there is presently no identified risk associated with diagnostic ultrasound. However, a prudent and conservative approach is recommended in which diagnostic ultrasound should be used only for medical benefit and with minimal exposure.

For more information about this topic or other topics related to ultrasound, visit the AIUM website at www.aium.org.

1 US Department of Health and Human Services, Public Health Service, Food and Drug Administration: An Overview of Ultrasound: Theory, Measurement, Medical Applications, and Biological Effects. Publication # FDA 82-8190.

2 Environmental Health Criteria 22: Ultrasound. World Health Organization: Geneva, 1982, p 19.

3 US Food and Drug Administration, Center for Devices and Radiological Health, Diagnostic Devices Branch. Fetal Keepsake Videos. Available at: http://www.fda.gov/cdrh/consumer/fetalvideos.html. Accessed November 4, 2002.

Last updated December 2002
© American Institute of Ultrasound in Medicine 14750 Sweitzer Lane, Suite 100 · Laurel, MD 20707 Phone: 301-498-4100

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ACHMAD MOCHTAR GENERAL HOSPITAL BUKITTINGGI

ACHMAD MOCHTAR GENERAL HOSPITAL BUKITTINGGI
RUMAH SAKIT ACHMAD MOCHTAR BUKITTINGGI

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drFirman Abdullah SpOG / ObGyn

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Dr Firman Abdullah SpOG/ OBGYN, Bukittinggi, Sumatera Barat ,Indonesia

Dr Firman Abdullah SpOG/ OBGYN,                              Bukittinggi, Sumatera Barat ,Indonesia

Bukittinggi , Sumatera Barat , Indonesia

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