Ultrasound Scans Can Affect Fetal Brain Development - KLTV.com - Tyler, Longview, Jacksonville |ETX News

8/8/06-Washington

Ultrasound Scans Can Affect Fetal Brain Development

The American Institute of Ultrasound Medicine tries to discourage "entertainment" ultrasound imaging. The American Institute of Ultrasound Medicine tries to discourage "entertainment" ultrasound imaging.
Keepsake sonograms have become a popular item with many young parents -- from Tom Cruise to the couple next door. It's a practice many physicians would like to discourage.

The latest concern comes from a study that suggests, in mice at least, that ultrasound can affect the development of the fetal brain.

Even so, researchers say the findings should not keep pregnant women from having ultrasound scans when needed for medical reasons.

When pregnant mice were exposed to ultrasound, a small number of nerve cells in the developing brains of their fetuses failed to extend correctly in the cerebral cortex.

"Our study in mice does not mean that use of ultrasound on human fetuses for appropriate diagnostic and medical purposes should be abandoned," said Dr. Pasko Rakic, lead researcher and chairman of the neurobiology department at Yale University School of Medicine.

However, he added in a telephone interview, women should avoid unnecessary ultrasound scans until more research has been done.

Dr. Joshua Copel, president-elect of the American Institute of Ultrasound Medicine, said his organization tries to discourage "entertainment" ultrasound, but considers sonograms important when there is a medical benefit.

"Anytime we're doing an ultrasound we have to think of risk versus benefit. What clinical question are we trying to answer," Copel said in a telephone interview. "It may be very important to know the exact dating of pregnancy, it's certainly helpful to know the anatomy of the fetus, but we shouldn't be holding a transducer on mom's abdomen for hours and hours and hours."

Rakic's paper said that while the effects of ultrasound in human brain development are not yet known, there are disorders thought to be the result of misplacement of brain cells during their development.

"These disorders range from mental retardation and childhood epilepsy to developmental dyslexia, autism spectrum disorders and schizophrenia," the researchers said.

Their report is in Tuesday's edition of Proceedings of the National Academy of Sciences.

Early ultrasound scans are done to determine the exact week of the pregnancy and they are also done later to check for anatomical defects and other problems.

However, some expectant parents have sought scans to save as keepsakes even when they were not medically necessary, a practice the Food and Drug Administration discourages.

The Institute of Ultrasound Medicine was particularly concerned last year when it was announced that actor Cruise had purchased an ultrasound machine so he and his pregnant fiancee, Katie Holmes, could do their own sonograms.

"Purchase of an ultrasound machine for private, at home use entails inappropriate operation of a prescription medical device designed for diagnostic use by a trained medical professional," the group said in a statement issued at the time.

Copel, a professor of obstetrics and gynecology at Yale University School of Medicine, did point out that there are large differences between scanning mice and scanning people.

For example, because of their size, the distance between the scanner and the fetus is larger in people than mice, which reduces the intensity of the ultrasound. In addition, he said, the cranial bones in a human baby are denser than those of a tiny mouse, which further reduces exposure to the scan.

The paper noted that the developmental period of these brain cells is much longer in humans than in mice, so exposure would be a smaller percentage of their developmental period.

However, it also pointed out that brain cell development in people is more complex and there are more cells developing, which could increase the chances of some going astray.

In Rakic's study, pregnant mice were exposed to ultrasound for various amounts of time ranging from a total exposure of 5 minutes to 420 minutes. After the baby mice were born, their brains were studied and compared with those of mice whose mothers had not been exposed to ultrasound.

The study of 335 mice concluded that in those whose mothers were exposed to a total of 30 minutes or more, "a small but statistically significant number" of brain cells failed to grow into their proper position and remained scattered in incorrect parts of the brain. The number of affected cells increased with longer exposures.

The research was funded by the National Institute of Neurological Disorders and Stroke.

Copyright 2006 The Associated Press.

  • NewsMore>>

  • Firefighters help angel tree kids

    Firefighters help angel tree kids

    Saturday, December 16 2017 11:51 PM EST2017-12-17 04:51:23 GMT

    East Texas firefighters come to the rescue of angel tree kids. Big Sandy firefighters held two fund-raisers over the past week to help their local Angel Tree network. They collected enough donations to buy toys for 28 kids through the local group 'Agape House Ministries Angel Tree' coordinators. Volunteers also collected cash donations which they turned over to Agape ministries. Copyright 2017 KLTV. All rights reserved.

    More >>

    East Texas firefighters come to the rescue of angel tree kids. Big Sandy firefighters held two fund-raisers over the past week to help their local Angel Tree network. They collected enough donations to buy toys for 28 kids through the local group 'Agape House Ministries Angel Tree' coordinators. Volunteers also collected cash donations which they turned over to Agape ministries. Copyright 2017 KLTV. All rights reserved.

    More >>
  • Big Sandy uses burn house for training

    Big Sandy uses burn house for training

    Saturday, December 16 2017 11:43 PM EST2017-12-17 04:43:35 GMT

    Volunteer firefighters rolled out in one East Texas city today to set a house on fire. It was all part of an unusual set of circumstances that led Big Sandy VFD to seek a unique training opportunity. 

    More >>

    Volunteer firefighters rolled out in one East Texas city today to set a house on fire. It was all part of an unusual set of circumstances that led Big Sandy VFD to seek a unique training opportunity. 

    More >>
  • Pittsburg hold charity chili cook-off

    Pittsburg hold charity chili cook-off

    Saturday, December 16 2017 11:37 PM EST2017-12-17 04:37:15 GMT
    A recent East Texas chili cook-off competition had its origins in the stark reality of the poverty that befalls families with children. A chili cook-off in Pittsburg recently was a competition by teams made up of all first responders. "We ended up with 6 first responder groups from Pittsburg and Camp county," says Pittsburg police chief Richard Penn. But the origins of this competition have a stark beginning. The effort goes back to a welfare check Pittsburg offi...More >>
    A recent East Texas chili cook-off competition had its origins in the stark reality of the poverty that befalls families with children. A chili cook-off in Pittsburg recently was a competition by teams made up of all first responders. "We ended up with 6 first responder groups from Pittsburg and Camp county," says Pittsburg police chief Richard Penn. But the origins of this competition have a stark beginning. The effort goes back to a welfare check Pittsburg offi...More >>
Powered by Frankly