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Faster help for stroke patients in offing
Saturday January 05, 2013 12:31:27 PM,
IANS
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Sydney: Scientists have
now created a new vision test that tracks the response of stroke
patients to different colours and assesses which part of the brain
has been damaged - increasing the chances of survival.
Strokes are the world's sixth commonest cause of death, accounting
for almost five percent of all fatalities, according to WHO
figures.
The test requires patients to look into a device for about 10
minutes, enabling it to be used in the early stages of a stroke -
even if the patient cannot move their limbs or speak, the journal
Investigative Ophthalmology and Visual Science reported.
This can help doctors diagnose and treat the stroke quickly and
accurately, which is vital, as early treatment can greatly improve
a person's chances of survival and recovery, said Corinne Carle
and Ted Maddess, professors at The Vision Centre of The Australian
National University.
"Our new test automatically tracks the response of the patient's
eye pupils to different colours, and can show doctors whether the
injury is located in the evolutionarily 'new brain' or the 'old
brain'," Carle said, according to a Vision Centre statement.
"The distinction is important because the 'old brain', or
midbrain, controls things like the heart rate and blood pressure
of the body. So if you find that the midbrain has been damaged,
you'll need to treat the patient much more aggressively, because
there's a higher risk of death."
On the other hand, an injury in the 'new brain' - the cortex - may
cause permanent blindness in a part of the person's visual field,
or difficulty in their thoughts, speech and movement, but has a
lower risk of death, she added.
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