Birthmarks best treated with red laser light

Mikhail Gorbachev was probably not greatly troubled by the "port wine stain" on his forehead, or perhaps he had no faith in the available treatments. Nevertheless, one in three of such birthmarks can be effectively treated using a laser. As part of a project funded by the NWO's Technology Council (STW), physicists at the University of Amsterdam have been able to improve the method considerably by increasing the wavelength of the laser light by a few nanometres, making it redder and able to penetrate better.

About 1% of normal skin consists of blood vessels. "Port wine" birthmarks have far more blood vessels than normal and the diameter of these vessels is also much greater. This gives the characteristic port-wine colour. This type of skin abnormality can be treated using photo-selective thermolysis, during which the area is irradiated with laser light of a particular colour; this is absorbed well by the blood but not by the rest of the skin. The light energy absorbed is converted into heat, which causes the blood vessels to shrivel up. After a period of healing, the area treated looks more like the surrounding normal skin.

The Dutch physicists developed a model enabling them to mimic the effect of various different types of laser light. They found that laser light at the wavelength of 585 nanometres currently used could hardly reach the centre of the large blood vessels. By choosing a slightly different colour, for example 590 nanometres, the deeper blood vessels were also accessible, without damage being done to the rest of the skin tissue. It should be noted that some 20% to 30% of "port wine" birthmarks are still not amenable to laser treatment, or only to a very limited extent, and treatment is sometimes painful, lengthy and expensive.


Contact: Dr. Wim Verkruysse
Netherlands Organization for Scientific Research

Page: 1

Related medicine news :

1. Women successfully treated to prevent preterm labor at low risk for recurrent episode
2. Cholesterol under-treated in high-risk women in managed care study
3. Heart patients treated by non-cardiologists less likely to receive medications
4. Heart failure patients treated for diabetes with insulin have increase in mortality
5. Heart arrhythmias easily treated, yet few know risks
6. Study showed vitamin D inadequacy highly prevalent among women treated for osteoporosis
7. World mental health surveys find mental disorders highly prevalent and often untreated
8. Kadian alleviated chronic pain in patients unsuccessfully treated with well-known therapies
9. Untreated postmenopausal women with osteoporosis
10. Black men less likely to be treated for aggressive prostate cancer, UMHS study finds
11. HPV in skin of psoriasis patients treated with medication and UV light therapy

Post Your Comments:

(Date:8/31/2020)... ... 31, 2020 , ... Genesis Chiropractic Software and Billing ... launch of its integrated, HIPAA compliant, telehealth solution, available to US-based clients immediately. ... 90 seconds. , According to the U.S. Department of Health & Human ...
(Date:8/31/2020)... Ga. (PRWEB) , ... August 31, 2020 , ... The pandemic and topsy-turvy economic outlook ... examine our budgets and look for ways to trim the fat from our monthly expenses ... your finances, but it’s also important that you have a financial safety net in place ...
(Date:8/31/2020)... ... August 31, 2020 , ... ... directly with persons with autism and other developmental disabilities, as well as supporting ... parent education, adolescents with autism, school consultation, and staff development. She joined the ...
(Date:8/28/2020)... ... August 28, 2020 , ... Ernst & ... was named an Entrepreneur Of The Year® 2020 Florida Award finalist. Now in ... whose ambitions deliver innovation, growth and prosperity as they build and sustain successful ...
(Date:8/28/2020)... , ... August 28, 2020 , ... ... Nourished Group set out to continue helping the specialty-diet community connect with ... new gluten-free products, get coupons, enter giveaways, chat with brands & watch over ...
Breaking Medicine News(10 mins):
(Date:8/26/2020)... N.D. (PRWEB) , ... August 26, 2020 , ... As ... familiar with the daily routine for preventing the Coronavirus. Wear a mask, keep your ... and fiber advocate Dr. Denis Burkitt said it best in 1977, “How much better ...
(Date:8/26/2020)... ... August 26, 2020 , ... Hero Life Sciences announced ... 115 million 3 ply surgical disposable face masks and N95 respirators in its manufacturing ... to the challenge that most Americans are facing in trying to find quality disposable ...
(Date:8/26/2020)... ... August 26, 2020 , ... ... appointment of Claude E. Hooton as President and Chief Executive Officer effective immediately. ... Chairman of the company’s Board of Managers. , Mr. Hooton, a seasoned ...
Breaking Medicine Technology:
Cached News: