Featured Research

from universities, journals, and other organizations

Is Ultrasound As Useful As We Think?

Date:
August 17, 2007
Source:
British Medical Ultrasound Society
Summary:
The usefulness of fetal 'nuchal thickness' as a technique for attempting to diagnose Down's syndrome in obstetric ultrasound is overstated and reliance on this surrogate marker may result in the 'loss' of normal babies, according to a recent article. The author raises the possibility that ultrasound is not as useful as has been suggested.

The usefulness of foetal 'nuchal thickness' as a technique for attempting to diagnose Down's syndrome in obstetric ultrasound is overstated and reliance on this surrogate marker may result in the 'loss' of normal babies.

In a recent article published inUltrasound, the Journal of the British Medical Ultrasound Society (Vol. 15, Number 3, 2007), Dr Hylton Meire raises the possibility that ultrasound is not as useful as has been suggested. He particularly emphasises the lack of scientific data to support the use of foetal 'nuchal thickness' measurements in routine clinical ultrasound practice to ascertain the presence of Down's syndrome.

Statement

The routine use of ultrasound in obstetrics became commonplace in the years before clinicians tried to ensure that all changes in medical practice were supported by scientifically valid research studies.

The nuchal translucency thickness scan is an ultrasound scan performed between 11 and 13+6 weeks of pregnancy, during which the fluid at the back of the baby's neck (the nuchal translucency) is measured. Babies with abnormalities tend to accumulate more fluid at the back of their neck during the first trimester, causing this clear space to be larger than average.

Dr Meire reviews the available scientific evidence in support of the routine use of ultrasound as a screening procedure for pregnant women. He concentrates on the 'routine abnormality scan', typically performed at 18-20 weeks of pregnancy, and assessment of the foetal 'nuchal thickness' performed at 11-13 weeks as a screening procedure for chromosome abnormalities such as Down's syndrome.

Dr Meire concludes that there is no valid data showing any population benefit from the 18-20 week scan and shows that this position has been agreed by many of the world's major medical bodies for many years. Several of these bodies have expressed the need for a large confirmatory study but accept that no such study has yet been performed.

Dr Meire also shows that the value of 'nuchal thickness' measurement has probably been overstated and the technique has not been subjected to valid scientific and statistical scrutiny. Using this technique to try to prevent the births of all cases of the two most common chromosome abnormalities in the UK would lead to the loss of 3200 normal babies every year.*

(*Birth rate in 2005 722,500 births. Cases of trisomy 18 and 21 0.139% = 1000 cases per year. 160 normals lost for every 50 live birth cases of trisomy 18 or 21 prevented. 1000/50x160 = 3200)

Dr Hylton B Meire, MBBS, LRCP, MRCS, DObstRCOG, DMRD, FRCR


Story Source:

The above story is based on materials provided by British Medical Ultrasound Society. Note: Materials may be edited for content and length.


Cite This Page:

British Medical Ultrasound Society. "Is Ultrasound As Useful As We Think?." ScienceDaily. ScienceDaily, 17 August 2007. <www.sciencedaily.com/releases/2007/08/070816090933.htm>.
British Medical Ultrasound Society. (2007, August 17). Is Ultrasound As Useful As We Think?. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2007/08/070816090933.htm
British Medical Ultrasound Society. "Is Ultrasound As Useful As We Think?." ScienceDaily. www.sciencedaily.com/releases/2007/08/070816090933.htm (accessed July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins