Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

BUSM researchers identify better laser for treating facial spider veins

08.10.2009
Researchers from Boston University School of Medicine (BUSM) have concluded that the 940nm wavelength laser is superior for treating facial spider veins (telangiectasias) as compared to the 532nm wavelength laser.

The findings, which appear in the recent issue of Lasers in Surgery and Medicine, are the first time these lasers were tested against each other for superiority.

Telangiectasias are open (dilated) blood vessels in the outer layer of the skin usually caused by sun damage or aging. When appearing on the legs, they are often called spider veins. They are common to a number diseases, including acne, rosacea, birthmarks (port-wine stains), scleroderma, several types of inherited disorders (ataxia-telangiectasia, hereditary hemorrhagic telangiectasia, xeroderma pigmentosum, and others), or with prolonged use of oral or topical corticosteroids.

According to the researchers, while both the 532 and 940nm wavelength lasers are effective for facial telangiectasias, they lacked evidence to support whether one wavelength was superior to the other until now.

A total of 24 facial anatomic sites were treated with the 532 and the 940nm wavelength lasers. The presence and severity of side effects such as pain, erythema, crusting, swelling and blistering were assessed.

The researchers found pain associated with the laser treatment was significantly less for the 940nm wavelength compared to the 532nm wavelength. Erythema post-treatment was significantly less with 940nm relative to 532 nm. Significant crusting and swelling were only reported with the 532nm wavelength. Visual improvement with the 940nm wavelength was greater than that achieved with the 532nm wavelength. On photographic evaluation, the 940nm laser was significantly more efficacious for larger caliber vessels than 532nm. Both wavelengths were equally effective for smaller caliber vessels.

"The 940nm diode laser was found to have greater efficacy for deeper blood vessels based upon its superior penetration of the dermis with a longer wavelength. In addition, the 940nm wavelength corresponds with a lesser absorption peak of oxyhemoglobin than that for 532 nm, resulting in slower and more uniform heating of the vessel," said lead author Emily Tierney, MD, an assistant professor of dermatology at BUSM. "In addition, there is minimal melanin absorption at the 940nm wavelength, and thus, there is less risk of post-inflammatory change or scarring," she added.

Given the efficacy and safety of the 940nm wavelength laser, the researchers recommend this wavelength be added to the standard treatment facial vasculature.

Gina M. DiGravio | EurekAlert!
Further information:
http://www.bmc.org

More articles from Medical Engineering:

nachricht Self-powered paper-based 'SPEDs' may lead to new medical-diagnostic tools
23.08.2017 | Purdue University

nachricht New technique to treating mitral valve diseases: First patient data
22.08.2017 | Universitätsspital Bern

All articles from Medical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

What the world's tiniest 'monster truck' reveals

23.08.2017 | Life Sciences

Treating arthritis with algae

23.08.2017 | Life Sciences

Witnessing turbulent motion in the atmosphere of a distant star

23.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>