The use of microdermabrasion for acne: a pilot study.
*Dermabrasion; Acne Vulgaris/pathology/*surgery; Adolescent; Adult; Child; Female; Humans; Male; Pilot Projects
BACKGROUND: Microdermabrasion is a superficial peeling modality that has become quite popular with our patients and the media. OBJECTIVE: To evaluate the use of microdermabrasion in patients with acne. METHODS: Twenty-five patients with grade
Lloyd J R
Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]
2001
2001-04
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1097/00042728-200104000-00001" target="_blank" rel="noreferrer noopener">10.1097/00042728-200104000-00001</a>
Long-term evaluation of the long-pulsed alexandrite laser for the removal of bikini hair at shortened treatment intervals.
*Laser Therapy; Adolescent; Adult; Female; Hair Removal/*methods; Humans; Male; Middle Aged; Time Factors; Treatment Outcome
BACKGROUND: Laser-assisted hair removal is becoming the treatment of choice for removing unwanted hair. OBJECTIVE: The purpose of this work was to determine the long-term efficacy of the long-pulsed infrared (LPIR) laser at shortened treatment intervals for the treatment of bikini hair. METHODS: Eleven patients received five treatments at 3-week intervals to the right groin using the LPIR laser. Laser parameters were held constant for all treatments: 10 mm spot size, 20 J, and 20-msec pulse duration. Results were evaluated 1 year after the last laser treatment. Hair counts were performed. RESULTS: The average patient had a 78% clearance of hair noted at 1 year with no evidence of scarring or pigmentary changes. CONCLUSIONS: A simulated model of cutaneous hair follicles provides evidence that shorter treatment intervals (3 weeks) may be preferable for more complete destruction of the hair follicle bulb and bulge.
Lloyd J R; Mirkov Mirko
Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]
2000
2000-07
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1046/j.1524-4725.2000.00013.x" target="_blank" rel="noreferrer noopener">10.1046/j.1524-4725.2000.00013.x</a>
Analytical modeling of laser pulse heating of embedded biological targets: An application to cutaneous vascular lesions
therapy; medicine; tissue; vessels; duration; exposure; Physics; distributions; port-wine stains; thermal relaxation; time constants
Detailed understanding of the thermal processes in biological targets undergoing laser irradiation continues to be a challenging problem. For example, the contemporary pulsed dye laser (PDL) delivers a complex pulse format which presents specific challenges for theoretical understanding and further development. Numerical methods allow for adequate description of the thermal processes, but are lacking for clarifying the effects of the laser parameters. The purpose of this work is to derive a simplified analytical model that can guide the development of future laser designs. A mathematical model of heating and cooling processes in tissue is developed. Exact analytical solutions of the model are found when applied to specific temporal and spatial profiles of heat sources. Solutions are reduced to simple algebraic expressions. An algorithm is presented for approximating realistic cases of laser heating of skin structures by heat sources of the type found to have exact solutions. The simple algebraic expressions are used to provide insight into realistic laser irradiation cases. The model is compared with experiments on purpura threshold radiant exposure for PDL. These include data from four independent groups over a period of 20 years. Two of the data sets are taken from previously published articles. Two more data sets were collected from two groups of patients that were treated with two PDLs (585 and 595 nm) on normal buttocks skin. Laser pulse durations were varied between 0.5 and 40 ms; radiant exposures were varied between 3 and 20 J/cm(2). Treatment sites were evaluated 0.5, 1, and 24 hours later to determine purpuric threshold. The analytical model is in excellent agreement with a wide range of experimental data for purpura threshold radiant exposure. The data collected by independent research groups over the last 20 years with PDLs with wavelengths ranged from 577 to 595 nm were described accurately by this model. The simple analytical model provides an accurate description of a wide range of experimental data. The model can be used to guide the development of future laser designs and help refine laser parameters.
Mirkov M; Sherr E A; Sierra R A; Lloyd J R; Tanghetti E
Journal of Applied Physics
2006
2006-06
Journal Article or Conference Abstract Publication
<a href="http://doi.org/10.1063/1.2200592" target="_blank" rel="noreferrer noopener">10.1063/1.2200592</a>
Laser Hair Removal Put in the Wrong Hands
Dermatology; Surgery
Nisar M S; Lloyd J R; Khan T
Dermatologic Surgery
2013
2013-03
Journal Article
<a href="http://doi.org/10.1111/dsu.12086" target="_blank" rel="noreferrer noopener">10.1111/dsu.12086</a>
A scaling rash preferentially involving a recent tattoo
Dermatology
Veerula V; Lloyd J R; Brodell R T
Journal of the American Academy of Dermatology
2012
2012-06
Journal Article
<a href="http://doi.org/10.1016/j.jaad.2011.08.024" target="_blank" rel="noreferrer noopener">10.1016/j.jaad.2011.08.024</a>