scholarly journals Greater Detection of Small Caliber Blood Vessels in Port Wine Stain with X Mode Than With Conventional Doppler: A Pilot Study

2017 ◽  
Vol 108 (7) ◽  
pp. 690-692
Author(s):  
I. Salgüero Fernández ◽  
F. Alfageme Roldán ◽  
G. Roustan Gullón
Keyword(s):  
Pilot Study ◽  
Blood Vessels ◽  
Port Wine Stain ◽  
Port Wine

Dynamic epidermal cooling in conjunction with laser-induced photothermolysis of port wine stain blood vessels

1996 ◽  
Vol 19 (2) ◽  
pp. 224-229 ◽  
Author(s):  
J. Stuart Nelson ◽  
Thomas E. Milner ◽  
Bahman Anvari ◽  
B. Samuel Tanenbaum ◽  
Lars O. Svaasand ◽  
...  
Keyword(s):  
Blood Vessels ◽  
Port Wine Stain ◽  
Port Wine

scholarly journals A Rare Presentation of Acquired Port Wine Stain in an Elderly Male

2021 ◽  
Vol 4 (1) ◽  
pp. 457-458
Author(s):  
Prasanna Kumar Jha ◽  
Satyendra Kumar Singh
Keyword(s):  
Blood Vessels ◽  
Vascular Lesions ◽  
Port Wine Stain ◽  
Port Wine ◽  
Elderly Male ◽  
Rare Presentation ◽  
Vascular Plexus ◽  
Port Wine Stains ◽  
Weber Syndrome ◽  
Sturge Weber Syndrome

Acquired port wine stain though an uncommon entity that develops later in life, resembles congenital port wine stain morphologically and histologically. Congenital port wine stains are vascular lesions caused by progressive ectasia of blood vessels which is located in the vascular plexus of the dermis. Congenital port-wine stains may be associated with Sturge Weber syndrome causing neurological and eye abnormalities such as glaucoma. Here we report a 60-year-old male presenting with a complaint of asymptomatic reddish patches over the nose for 15 years.

Effect of Time-Dependent Boundary Conditions on Epidermal Tissue Damage During Port Wine Stain Laser Surgery

2001 ◽  
Author(s):  
Guillermo Aguilar ◽  
Sergio H. Diaz Valdes ◽  
J. Stuart Nelson ◽  
Enrique J. Lavernia
Keyword(s):  
Boundary Conditions ◽  
Blood Vessels ◽  
Laser Therapy ◽  
Tissue Damage ◽  
Laser Surgery ◽  
Thermal Damage ◽  
Laser Light ◽  
Time Dependent ◽  
Port Wine Stain ◽  
Port Wine

Abstract Port wine stain (PWS) birthmarks are a congenital and progressive vascular malformation of the dermis, involving capillaries, which occurs in approximately 0.7% of children. The objective of laser surgery for this and similar conditions is to cause selective thermal damage, thrombosis, and, eventually, permanent photocoagulation in the PWS vessels. To achieve this, the radiated laser light is set at a specific wavelength, which is highly absorbed by the blood vessels’ hemoglobin (the major chromophore in blood). Unfortunately, the PWS vessels do not absorb all energy radiated — a significant amount is also absorbed by hemoglobin in the ectatic capillaries of the upper dermis. This unwanted absorption causes two problems: firstly, insufficient heat generation within the targeted vessels leads to poor clinical results, and, secondly, there is an increased risk of damage to the overlying epidermis. In current PWS laser therapy, cryogen spray cooling (CSC) is used effectively to cool and protect selectively the epidermis (tens of micrometers thick) prior to the laser pulse, while minimally cooling the blood vessels. The thermal response of the system is characterized by time and/or temperature dependent boundary conditions. However, in many recent studies, the boundary conditions induced by CSC are regarded as constant. In the present work we study the effects of time-dependent boundary conditions on the overall epidermal thermal damage after PWS laser therapy. We use computer models to simulate the laser light distribution, heat diffusion, and tissue damage, and introduce experimentally determined time-dependent boundary conditions measured for custom-made and commercial atomizing nozzles. We show that time-dependent boundary conditions have a significant effect in the optimal laser dose required to induce photocoagulation of PWS blood vessels while preserving the epidermis.

Light distributions in a port wine stain model containing multiple cylindrical and curved blood vessels

1996 ◽  
Vol 18 (4) ◽  
pp. 345-357 ◽  
Author(s):  
Gerald W. Lucassen ◽  
Wim Verkruysse ◽  
Marleen Keijzer ◽  
Martin J.C. van Gemert
Keyword(s):  
Blood Vessels ◽  
Port Wine Stain ◽  
Port Wine

scholarly journals Pilot study examining the combined use of pulsed dye laser and topical Imiquimod versus laser alone for treatment of port wine stain birthmarks

2008 ◽  
Vol 40 (9) ◽  
pp. 605-610 ◽  
Author(s):  
Cheng-Jen Chang ◽  
Yen-Chang Hsiao ◽  
Martin C. Mihm ◽  
J. Stuart Nelson
Keyword(s):  
Pilot Study ◽  
Dye Laser ◽  
Pulsed Dye Laser ◽  
Port Wine Stain ◽  
Port Wine ◽  
Topical Imiquimod ◽  
Combined Use

Laser pulse impact on rat mesenteric blood vessels in relation to laser treatment of port wine stain

2001 ◽  
Vol 28 (5) ◽  
pp. 461-468 ◽  
Author(s):  
Wim Verkruysse ◽  
Johan F Beek ◽  
Ed VanBavel ◽  
Martin JC van Gemert ◽  
Jos AE Spaan
Keyword(s):  
Laser Pulse ◽  
Blood Vessels ◽  
Laser Treatment ◽  
Port Wine Stain ◽  
Port Wine

Thermolysis of port-wine-stain blood vessels: Diameter of a damaged blood vessel depends on the laser pulse length

1996 ◽  
Vol 11 (3) ◽  
pp. 177-180 ◽  
Author(s):  
J. F. De Boer ◽  
G. W. Lucassen ◽  
W. Verkruysse ◽  
M. J. C. Van Gemert
Keyword(s):  
Laser Pulse ◽  
Blood Vessel ◽  
Blood Vessels ◽  
Pulse Length ◽  
Port Wine Stain ◽  
Port Wine ◽  
Laser Pulse Length
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