Showing posts with label Laser. Show all posts
Showing posts with label Laser. Show all posts

Tuesday, February 12, 2013

New diabetic retinopathy treatment more effective: experts

Posted: 06 November 2012
By Vimita Mohandas


A patient receiving laser treatment for diabetic retinopathy. (AFP/Elmer Martinez)
SINGAPORE: The new anti-VEGF treatment option for diabetic retinopathy patients has been hailed by experts as being more effective than traditional laser treatments.

Diabetic retinopathy, a condition of the eyes affecting diabetics that causes swelling and blurred vision, plague an approximate 100,000 Singaporeans say experts.

"Anti-VEGF therapy is a new therapy which effectively reduces the swelling in the eye," said Professor Wong Tien Yin, Executive Director at the Singapore Eye Research Institute. "It works by suppressing growth factors that causes the blood vessels to leak and the retina to swell."

Diabetic retinopathy patients traditionally undergo laser treatment to treat their symptoms.

However Professor Wong noted that visual improvement after laser treatments was not common and that many continued to lose vision after treatment, adding that the laser option was "good but not completely satisfactory".

"The new anti-VEGF therapy essentially helps improve vision in patients... and therefore patients have a better quality of life," he said.

However, anti-VEGF treatments can cost up to S$42,000, compared to laser treatments which cost between S$500 and S$1,600.

Patients undergoing anti-VEGF undergo seven intro-ocular injections into the eye in the first year of treatment, followed by four injections in the second year and three in the third year. The each injection costs between S$1,200 and S$3,000.

Despite that, more than a thousand patients in Singapore have undergone anti-VEGF treatment since hospitals started offering it last September.

Professor Wong also noted that screening for diabetic retinopathy could be further streamlined to ensure better detection.

"In many countries, including Singapore, family general practitioners conduct screening for diabetic retinopathy," he said. "Despite their medical background and training, their evaluation may be limited due to busy clinic schedules".

Instead, non-physicians or eye research technicians should also be used to detect diabetic retinopathy said Professor Wong, citing a local study conducted in 2009 that showed trained eye research technicians outperforming family general practitioners in detecting diabetic retinopathy.

- CNA/jc



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Taken from ChannelNewsAsia.com; source article is below:
New diabetic retinopathy treatment more effective: experts

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Monday, September 27, 2010

Optical Pacemakers: A Breakthrough

A recent breakthrough could save the lives of thousands of newborns suffering from heart conditions. Researchers have successfully used an optical pacemaker to assist the beat of a newborn quail's heart.
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Optical Pacemakers Could Hold Key to Affecting Embryonic Heart Development

Dave Greenfield | Date: 09-24-10



One of the greatest medical inventions of the 20th century was the pacemaker. Pacemakers have helped save the lives of countless adults suffering from extreme heart conditions. They keep the pace of the heart at a steady beat when it is unable to do so on its own.


However, the average pacemaker is nearly impossible to use on smaller, underdeveloped hearts such as those of premature babies. Operating on premature babies is extremely dangerous and often results in severe complications. As a result, scientists and research companies are continually working on perfecting the pacemaker in order to create a less-invasive way to affect embryonic heart development and preserve the life of premature babies.



A pacemaker was successfully used on the heart of a 40-hour-old quail (source: Jenkins et. al, Nature Photonics).
Recently, a small team of researchers achieved an impressive breakthrough by pacing the embryonic heart of a quail using an optical laser. The quail was only 40 hours old, and the embryonic heart was less than 2 millimeters long.



Without having to operate or come in direct contact with any organ, the researchers were able to send pulses to the quail's heart using a series of infrared lights. The quail's heart was paced successfully, and the published study recently appeared online in Nature Photonics.


Despite its early stages of development, this breakthrough has the potential to change the way prenatal doctors treat babies who are born prematurely and who suffer from severe heart conditions. It provides both doctors and parents with a workable option that can be achieved without putting the embryonic heart at risk. As it stands now, an "optical pacemaker" is an effective and safe way to keep the heart beating and has been proven to work on embryonic chick hearts.


While the lasting effects are still unknown and the concept of an "optical pacemaker" is still under development, it's a positive step in the direction of understanding the embryonic heart.


From Smarter Technology; source article is below:
Optical Pacemakers Could Hold Key to Affecting Embryonic Heart Development
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