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: Ancient Greek well yields rare wooden statue

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

US state reaches deal to keep dinosaur mummy

13 hours ago

North Dakota reached a $3 million deal to keep a rare fossil of a duckbilled dinosaur on display at the state's heritage center, where it will serve as a cornerstone for the facility's $51 million expansion, officials said ...

Jerusalem stone may answer Jewish revolt questions

16 hours ago

Israeli archaeologists said Tuesday they have discovered a large stone with Latin engravings that lends credence to the theory that the reason Jews revolted against Roman rule nearly 2,000 ago was because ...

Kung fu stegosaur

16 hours ago

Stegosaurs might be portrayed as lumbering plant eaters, but they were lethal fighters when necessary, according to paleontologists who have uncovered new evidence of a casualty of stegosaurian combat. The ...

User comments : 0