Measurement Skin Temperature During Pulsed Laser Exposure
Summary
Lasers are the treatment modality of choice for Port Wine Stain birthmarks.The epidermis is not totally spared due to partial absorption of energy therein by melanin that presents an optical barrier through which the light must pass to reach the underlying blood vessels. Absorption of laser energy by melanin causes localized heating in the epidermis, which may, if not controlled, produce permanent complications such as hypertrophic scarring or dyspigmentation.
Description
The researchers want to establish a correlation between non-invasive skin temperature measurements and the minimum laser energy during skin laser treatment using cryogen spray cooling.
This study would eliminate the need for test pulses to estimate the safe and acceptable radiant exposure prior to laser treatment.
Study Design
Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Conditions
Port Wine Stain Birthmark
Intervention
cooling spray during laser treatment
Location
Beckman Laser Institute Medical Clinic University of California Irvine
Irvine
California
United States
92612
Status
Enrolling by invitation
Source
University of California, Irvine
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT00540917
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Port-wine Stain
A vascular malformation of developmental origin characterized pathologically by ectasia of superficial dermal capillaries, and clinically by persistent macular erythema. In the past, port wine stains have frequently been termed capillary hemangiomas, which they are not; unfortunately this confusing practice persists: HEMANGIOMA, CAPILLARY is neoplastic, a port-wine stain is non-neoplastic. Port-wine stains vary in color from fairly pale pink to deep red or purple and in size from a few millimeters to many centimeters in diameter. The face is the most frequently affected site and they are most often unilateral. (From Rook et al., Textbook of Dermatology, 5th ed, p483)
Sturge-weber Syndrome
A non-inherited congenital condition with vascular and neurological abnormalities. It is characterized by facial vascular nevi (PORT-WINE STAIN), and capillary angiomatosis of intracranial membranes (MENINGES; CHOROID). Neurological features include EPILEPSY; cognitive deficits; GLAUCOMA; and visual defects.
Angioplasty, Laser
A technique utilizing a laser coupled to a catheter which is used in the dilatation of occluded blood vessels. This includes laser thermal angioplasty where the laser energy heats up a metal tip, and direct laser angioplasty where the laser energy directly ablates the occlusion. One form of the latter approach uses an EXCIMER LASER which creates microscopically precise cuts without thermal injury. When laser angioplasty is performed in combination with balloon angioplasty it is called laser-assisted balloon angioplasty (ANGIOPLASTY, BALLOON, LASER-ASSISTED).
Laser Therapy, Low-level
Treatment using irradiation with LASER light of low power intensity so that the effects are not due to heat, as in LASER THERAPY. These non-thermal effects are thought to be mediated by a photochemical reaction that alters CELL MEMBRANE PERMEABILITY, leading to increased mRNA synthesis and CELL PROLIFERATION. Low-level laser therapy has been used for a wide variety of conditions, but most frequently for wound healing and pain control.
Angioplasty, Balloon, Laser-assisted
Techniques using laser energy in combination with a balloon catheter to perform angioplasty. These procedures can take several forms including: 1, laser fiber delivering the energy while the inflated balloon centers the fiber and occludes the blood flow; 2, balloon angioplasty immediately following laser angioplasty; or 3, laser energy transmitted through angioplasty balloons that contain an internal fiber.
Clinical Trials
Combined Pulsed Dye Laser and Rapamycin Treatment of Port Wine Stain Birthmarks
The purpose of this research study is to improve port wine stain treatment in response to laser therapy.
Combined Pulsed Dye Laser and Rapamycin Treatment of Port Wine Stain Birthmarks
The purpose of this study is to improve port wine stain therapeutic outcome in response to laser therapy. The researchers want to determine whether the combined use of pulsed dye laser th...
Combining Topical Imiquimod 5% Cream With a Pulsed Dye Laser to Treat Port Wine Stain Birthmarks
Port wine stains (PWS) are red birthmarks that without treatment persist for a lifetime. They are frequently found on the face and can be conspicuous and disfiguring, negatively impacting...
The purpose of this study is to improve port wine stain (PWS) therapeutic outcome in response to pulsed dye laser (PDL) therapy by comparison of 577 nm versus 595 nm Wavelengths. Th...
Combined Alexandrite and Pulsed Dye Laser Treatment of Port Wine Stain Birthmarks
Port wine stain (PWS) is a congenital, progressive vascular malformation of skin involving post-capillary venules that occurs in an estimated 4 children per 1,000 live births. Approximatel...
PubMed Articles
Are port wines stains a feature of tuberous sclerosis?
Background Tuberous sclerosis complex is a multisystem inherited disorder characterized by the development of tumour-like growths in brain, skin and other organs. Although cutaneous vascular anomal...
Laser and IPL treatment of port-wine stains: therapy options, limitations, and practical aspects.
Port-wine stains (PWS) are congenital, progressive vascular malformations of the dermis that are often disfiguring, particularly when located in a cosmetically relevant area. Thus, the successful clea...
During the last three decades, several laser systems, ancillary technologies, and treatment modalities have been developed for the treatment of port wine stains (PWSs). However, approximately half of...
BACKGROUND: Early treatment of port wine stains with ionizing radiation can lead to the development of often multifocal basal cell carcinomas (BCC) after decades. In most cases it is clinically imposs...
Treatment of facial port-wine stains with a new intense pulsed light source in Chinese patients.
Abstract Background: Intense pulsed light (IPL) systems have been used for the treatment of port-wine stains (PWS) for more than 10 years. Some of them have been reported in the treatment of laser-res...
