Featured Research

from universities, journals, and other organizations

New Marker For Raised Intracranial Pressure

Date:
September 13, 2008
Source:
BioMed Central
Summary:
Magnetic resonance imaging measurements of the thickness of the optic nerve sheath are a good marker for raised intracranial pressure. New research shows that a retro-bulbar optic nerve sheath diameter above 5.82mm predicts raised ICP in 90 percent of cases.

Magnetic resonance imaging (MRI) measurements of the thickness of the optic nerve sheath are a good marker for raised intracranial pressure (ICP). New research published in BioMed Central's open access journal Critical Care shows that a retro-bulbar optic nerve sheath diameter (ONSD) above 5.82mm predicts raised ICP in 90% of cases.

The dural sheath surrounding the optic nerve communicates with the subarachnoid space and distends when ICP is elevated. Thomas Geeraerts, from Addenbrooke's Hospital, Cambridge, led a team who investigated whether MRI can be used to precisely measure the diameter of the optic nerve and its sheath. He said, "Raised ICP is frequent in conditions such as stroke, liver failure and meningitis. It is associated with increased mortality and poor neurological outcomes. As a result, the early detection and treatment of raised ICP is critical, but often challenging. Our MRI-based technique provides a useful, non-invasive solution".

The early detection of raised ICP can be very difficult when invasive devices are not available. As the authors report, "Clinical signs of raised ICP such as headache, vomiting and drowsiness are not specific and are often difficult to interpret. In sedated patients, clinical signs frequently appear well after the internal damage has been done. Optic nerve sheath distension could be an early, reactive and sensitive sign of raised ICP".

The authors carried out a retrospective blinded analysis of brain MR images in a prospective cohort of 38 patients requiring ICP monitoring after traumatic brain injury and 36 healthy controls. Geeraerts said, "We found that ONSD measurement was able to provide a quantitative estimate of the likelihood of significant cranial hypertension".


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Journal Reference:

  1. Thomas Geeraerts, Virginia FJ Newcombe, Jonathan P Coles, Maria Giulia Abate, Iain E Perkes, Peter JA Hutchinson, Jo G Outtrim, Dot A Chatfield and David K Menon. Using T2-weighted magnetic resonance imaging of the optic nerve sheath to detect raised intracranial pressure. Critical Care, 2008; (in press)

Cite This Page:

BioMed Central. "New Marker For Raised Intracranial Pressure." ScienceDaily. ScienceDaily, 13 September 2008. <www.sciencedaily.com/releases/2008/09/080910210531.htm>.
BioMed Central. (2008, September 13). New Marker For Raised Intracranial Pressure. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2008/09/080910210531.htm
BioMed Central. "New Marker For Raised Intracranial Pressure." ScienceDaily. www.sciencedaily.com/releases/2008/09/080910210531.htm (accessed April 18, 2014).

Share This



More Mind & Brain News

Friday, April 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Study On Artists' Brain Shows They're 'Structurally Unique'

Study On Artists' Brain Shows They're 'Structurally Unique'

Newsy (Apr. 17, 2014) The brains of artists aren't really left-brain or right-brain, but rather have extra neural matter in visual and motor control areas. Video provided by Newsy
Powered by NewsLook.com
Is Apathy A Sign Of A Shrinking Brain?

Is Apathy A Sign Of A Shrinking Brain?

Newsy (Apr. 17, 2014) A recent study links apathetic feelings to a smaller brain. Researchers say the results indicate a need for apathy screening for at-risk seniors. Video provided by Newsy
Powered by NewsLook.com
Are School Dress Codes Too Strict?

Are School Dress Codes Too Strict?

AP (Apr. 16, 2014) Pushing the limits on style and self-expression is a rite of passage for teens and even younger kids. How far should schools go with their dress codes? The courts have sided with schools in an era when school safety is paramount. (April 16) Video provided by AP
Powered by NewsLook.com
Could Even Casual Marijuana Use Alter Your Brain?

Could Even Casual Marijuana Use Alter Your Brain?

Newsy (Apr. 16, 2014) A new study conducted by researchers at Northwestern and Harvard suggests even casual marijuana use can alter your brain. Video provided by Newsy
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