Laser sheds light on stroke patients

Jan 04, 2006

A technique that creates and images blood clots in the brain may help researchers understand the small strokes implicated in many forms of dementia.

University of California, San Diego researchers used a laser to trigger the formation of individual blood clots in tiny arteries of the brains of anesthetized rats to monitor the resulting changes in blood flow.

They say their study provides a way to understand small strokes common in elderly humans. These strokes often cause no immediate symptoms, but they are thought to contribute to dementia and may ultimately cause larger strokes.

The study is published in the online edition of the journal Public Library of Science Biology.

In the study, the team members used tightly focused laser light to excite a dye that they had injected into the bloodstream. The excited dye reacted with oxygen to form a free radical, which "nicked" the cells lining the blood vessel at the target location, and triggered the natural blood clotting cascade.

Copyright 2006 by United Press International

Explore further: Unique entry complex discovered at Herodian Hilltop Palace

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Ancient clay seals may shed light on biblical era

Dec 20, 2014

Impressions from ancient clay seals found at a small site in Israel east of Gaza are signs of government in an area thought to be entirely rural during the 10th century B.C., says Mississippi State University archaeologist ...

Digging up the 'Spanish Vikings'

Dec 19, 2014

The fearsome reputation of the Vikings has made them the subject of countless exhibitions, books and films - however, surprisingly little is known about their more southerly exploits in Spain.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.