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Combination Therapy of Pulsed Dye Laser With Intense Pulsed Light in Port-Wine Stain Treatment: A Prospective Side-by-Side Comparison. Dermatol Surg 2021; 47:1229-1232. [PMID: 34448759 DOI: 10.1097/dss.0000000000003114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Pulsed dye laser (PDL) treatment currently represents the mainstream choice for port-wine stain (PWS) treatment in accordance with selective photothermolysis. However, most PWS lesions cannot be removed despite several treatments. Intense pulsed light (IPL) is reportedly an effective alternative to PDL for PWS treatment. No studies have thus far been reported on the combination therapy of PDL with IPL in PWS treatment. OBJECTIVE This study evaluated the efficacy and safety of PDL with IPL for PWS treatment. METHODS A total of 33 PWS lesions underwent 3 treatment sessions. Each PWS was divided into IPL + PDL, PDL, and untreated sites. Therapeutic outcomes were evaluated by visual assessment and chromametric assessment 3 months after the final treatment. RESULTS The overall average blanching rates were 36.2% and 32.6% at the sites treated with IPL + PDL and PDL, respectively (p > .05). No permanent side effects were reported. CONCLUSION In this laser setting, although IPL + PDL is a safe and effective PWS treatment, no significant improvement in the efficacy was observed using IPL + PDL in contrast to PDL alone.
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van Raath MI, Chohan S, Wolkerstorfer A, van der Horst CMAM, Limpens J, Huang X, Ding B, Storm G, van der Hulst RRWJ, Heger M. Clinical outcome measures and scoring systems used in prospective studies of port wine stains: A systematic review. PLoS One 2020; 15:e0235657. [PMID: 32614899 PMCID: PMC7332045 DOI: 10.1371/journal.pone.0235657] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/21/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Valid and reliable outcome measures are needed to determine and compare treatment results of port wine stain (PWS) studies. Besides, uniformity in outcome measures is crucial to enable inter-study comparisons and meta-analyses. This study aimed to assess the heterogeneity in reported PWS outcome measures by mapping the (clinical) outcome measures currently used in prospective PWS studies. METHODS OVID MEDLINE, OVID Embase, and CENTRAL were searched for prospective PWS studies published from 2005 to May 2020. Interventional studies with a clinical efficacy assessment were included. Two reviewers independently evaluated methodological quality using a modified Downs and Black checklist. RESULTS In total, 85 studies comprising 3,310 patients were included in which 94 clinician/observer-reported clinical efficacy assessments had been performed using 46 different scoring systems. Eighty-one- studies employed a global assessment of PWS appearance/improvement, of which -82% was expressed as percentage improvement and categorized in 26 different scoring systems. A wide variety of other global and multi-item scoring systems was identified. As a result of outcome heterogeneity and insufficient data reporting, only 44% of studies could be directly compared. A minority of studies included patient-reported or objective outcomes. Thirteen studies of good quality were found. CONCLUSION Clinical PWS outcomes are highly heterogeneous, which hampers study comparisons and meta-analyses. Consensus-based development of a core outcome-set would benefit future research and clinical practice, especially considering the lack of high-quality trials.
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Affiliation(s)
- M. Ingmar van Raath
- Department of Pharmaceutics, Jiaxing Key Laboratory for Photonanomedicine and Experimental Therapeutics, College of Medicine, Jiaxing University, Jiaxing, Zhejiang, PR China
- Department of Plastic, Reconstructive, and Hand Surgery, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Sandeep Chohan
- Department of Dermatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Albert Wolkerstorfer
- Department of Dermatology, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Chantal M. A. M. van der Horst
- Department of Plastic, Reconstructive and Hand Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Jacqueline Limpens
- Medical Library, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, The Netherlands
| | - Xuan Huang
- Department of Plastic, Reconstructive, and Hand Surgery, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands
| | - Baoyue Ding
- Department of Plastic, Reconstructive, and Hand Surgery, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands
| | - Gert Storm
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - René R. W. J. van der Hulst
- Department of Plastic, Reconstructive, and Hand Surgery, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands
| | - Michal Heger
- Department of Pharmaceutics, Jiaxing Key Laboratory for Photonanomedicine and Experimental Therapeutics, College of Medicine, Jiaxing University, Jiaxing, Zhejiang, PR China
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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van Raath M, Chohan S, Wolkerstorfer A, van der Horst C, Storm G, Heger M. Port wine stain treatment outcomes have not improved over the past three decades. J Eur Acad Dermatol Venereol 2019; 33:1369-1377. [PMID: 30908756 PMCID: PMC6618082 DOI: 10.1111/jdv.15599] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Accepted: 03/07/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Since the early '80s, the pulsed dye laser has been the standard treatment tool for non-invasive port wine stain (PWS) removal. In the last three decades, a considerable amount of research has been conducted to improve clinical outcomes, given that a fraction of PWS patients proved recalcitrant to laser treatment. Whether this research actually led to increased therapeutic efficacy has not been systematically investigated. OBJECTIVE To analyse therapeutic efficacy in PWS patients globally from 1986 to date. METHODS PubMed was searched for all available PWS trials. Studies with a quartile percentage improvement scale were included, analysed and plotted chronologically. Treatment and patient characteristics were extracted. A mean clearance per study was calculated and plotted. A 5-study simple moving average was co-plotted to portray the trend in mean clearance over time. The data were separately analysed for multiple treatment sessions in previously untreated patients. RESULTS Sixty-five studies were included (24.3% of eligible studies) comprising 6207 PWS patients. Of all patients, 21% achieved 75-100% clearance. Although a few studies reported remarkably good outcomes in a subset of carefully selected patients, there was no upward trend over time in mean clearance. CONCLUSION The efficacy of PWS therapy has not improved in the past decades, despite numerous technical innovations and pharmacological interventions. With an unwavering patient demand for better outcomes, the need for development and implementation of novel therapeutic strategies to clear all PWS is as valid today as it was 30 years ago.
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Affiliation(s)
- M.I. van Raath
- Department of PharmaceuticsCollege of MedicineJiaxing UniversityJiaxingChina
- Department of Experimental SurgeryAmsterdam UMCUniversity of AmsterdamAmsterdamthe Netherlands
| | - S. Chohan
- Department of Experimental SurgeryAmsterdam UMCUniversity of AmsterdamAmsterdamthe Netherlands
| | - A. Wolkerstorfer
- Department of DermatologyAmsterdam UMCUniversity of AmsterdamAmsterdamthe Netherlands
| | - C.M.A.M. van der Horst
- Department of Plastic, Reconstructive, and Hand SurgeryAmsterdam UMCUniversity of AmsterdamAmsterdamthe Netherlands
| | - G. Storm
- Department of PharmaceuticsUtrecht Institute for Pharmaceutical SciencesUtrecht UniversityUtrechtthe Netherlands
- Department of Controlled Drug DeliveryMIRA Institute for Biomedical Technology and Technical MedicineUniversity of TwenteEnschedethe Netherlands
| | - M. Heger
- Department of PharmaceuticsCollege of MedicineJiaxing UniversityJiaxingChina
- Department of Experimental SurgeryAmsterdam UMCUniversity of AmsterdamAmsterdamthe Netherlands
- Department of PharmaceuticsUtrecht Institute for Pharmaceutical SciencesUtrecht UniversityUtrechtthe Netherlands
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Chen S, Wang Y, Ren J, Yue B, Lai G, Du J. Efficacy and safety of intense pulsed light in the treatment of inflammatory acne vulgaris with a novel filter. J COSMET LASER THER 2019; 21:323-327. [PMID: 31023099 DOI: 10.1080/14764172.2019.1605450] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Acne vulgaris is one of the most common skin diseases affecting young people. Intense pulsed light (IPL) has become a well-recognized method in the treatment of acne vulgaris. We aim evaluate the clinical efficacy and safety of a novel IPL filter at wavelength of 400-600 nm and 800-1,200 nm in the treatment of inflammatory acne lesions. Twenty-one patients with Pillsbury I-III facial acne vulgaris between July 2017 and January 2018 were enrolled in this prospective clinical study. Five sessions of IPL treatment were administered to the subjects at 4-week interval. Final assessment was performed 1 month after the final treatment. One month posttreatment, over 75% subjects exhibited excellent or good response. Of the Pillsbury I-II patients, the effective rate reached 88.24%. The inflammatory lesions were dramatically decreased (25.23 ± 2.76 versus 14.01 ± 1.98) and statistically evident (P = .031). According to Hayashi assessment of acne severity, there was a significant improvement at follow-up visit (P = .022). Moreover, patients reported significant improvements in self-evaluation. The novel IPL filter at wavelength of 400-600 nm and 800-1,200 nm provides an effective option to treatment of inflammatory acne lesions, especially for Pillsbury I-II acne patients, with minimal reversible side effects, such as transient post-inflammatory pigmentation.
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Affiliation(s)
- Sunyi Chen
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
| | - Yan Wang
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
| | - Jie Ren
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
| | - Baishuang Yue
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
| | - Guanyin Lai
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
| | - Juan Du
- Department of Dermatology, Huashan Hospital Fudan University , Shanghai , P. R. China
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Choi B, Tan W, Jia W, White SM, Moy WJ, Yang BY, Zhu J, Chen Z, Kelly KM, Nelson JS. The Role of Laser Speckle Imaging in Port-Wine Stain Research: Recent Advances and Opportunities. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS : A PUBLICATION OF THE IEEE LASERS AND ELECTRO-OPTICS SOCIETY 2016; 2016:6800812. [PMID: 27013846 PMCID: PMC4800318 DOI: 10.1109/jstqe.2015.2493961] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Here, we review our current knowledge on the etiology and treatment of port-wine stain (PWS) birthmarks. Current treatment options have significant limitations in terms of efficacy. With the combination of 1) a suitable preclinical microvascular model, 2) laser speckle imaging (LSI) to evaluate blood-flow dynamics, and 3) a longitudinal experimental design, rapid preclinical assessment of new phototherapies can be translated from the lab to the clinic. The combination of photodynamic therapy (PDT) and pulsed-dye laser (PDL) irradiation achieves a synergistic effect that reduces the required radiant exposures of the individual phototherapies to achieve persistent vascular shutdown. PDL combined with anti-angiogenic agents is a promising strategy to achieve persistent vascular shutdown by preventing reformation and reperfusion of photocoagulated blood vessels. Integration of LSI into the clinical workflow may lead to surgical image guidance that maximizes acute photocoagulation, is expected to improve PWS therapeutic outcome. Continued integration of noninvasive optical imaging technologies and biochemical analysis collectively are expected to lead to more robust treatment strategies.
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Affiliation(s)
- Bernard Choi
- Departments of Biomedical Engineering and Surgery, the Beckman Laser Institute and Medical Clinic, and the Edwards Lifesciences Center for Advanced Cardiovascular Technology, all at University of California, Irvine 92612 USA
| | - Wenbin Tan
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Wangcun Jia
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Sean M. White
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Wesley J. Moy
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | - Bruce Y. Yang
- Beckman Laser Institute and Medical Clinic, University of California, Irvine 92612 USA
| | | | | | - Kristen M. Kelly
- Department of Dermatology and the Beckman Laser Institute and Medical Clinic, all at University of California, Irvine 92612 USA
| | - J. Stuart Nelson
- Departments of Biomedical Engineering and Surgery and the Beckman Laser Institute and Medical Clinic, all at University of California, Irvine 92612 USA
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Radmanesh M, Radmanesh R. Successful treatment of isolated venous malformation with 1444-nm fiberoptic Nd-YAG laser. J COSMET LASER THER 2016; 18:91-4. [PMID: 26735793 DOI: 10.3109/14764172.2015.1114636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
UNLABELLED Two patients with isolated venous malformations on the face were treated with fiberoptic Nd-YAG laser (Lutronic laser company, South Korea). After nerve block anesthesia, the laser tip was pushed into the lesions either through a hole made by a 16 gauge needle or directly by inserting and triggering the laser tip few millimeters away from the lesions. The laser tip was pushed from one or few directions and moved back and forth, while triggering, in a fan pattern to cover the whole lesion. The procedure was continued till complete flattening of the lesions. The parameters used were pulse rate = 30 hertz, pulse energy = 300 mJoules, power = 6.0 watt, and total energy used for the first patient was 1000 Joules and for the second patient was 800 joules. RESULTS The lesions flattened completely after whole tissue coagulation. Moderate redness disappeared in the first 48 hours. No persistent discoloration and no sign of cutaneous burning appeared after the procedures. No antibiotic or analgesic was prescribed after the procedure. The patients were followed for more than 2 years with no recurrence and good cosmetic results. CONCLUSION The fiberoptic Nd-YAG laser can be used as an effective procedure for venous malformations.
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Affiliation(s)
- Mohammad Radmanesh
- a Department of Dermatology , Ahvaz Jundishapur University of Medical Sciences , Ahvaz , Iran
| | - Ramin Radmanesh
- a Department of Dermatology , Ahvaz Jundishapur University of Medical Sciences , Ahvaz , Iran
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Abstract
The authors present current data from the literature relating to major characteristics and efficacy of methods of non-invasive diagnostics of rosacea (dermatoscopy, dopplerography, ultrasound scanning, confocal laser scanning microscopy) as well as aspects of a systemic external therapy, laser therapy and use of IPL systems in the treatment of patients suffering from rosacea.
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Moy WJ, Yakel JD, Osorio OC, Salvador J, Hayakawa C, Kelly KM, Choi B. Targeted narrowband intense pulsed light on cutaneous vasculature. Lasers Surg Med 2015; 47:651-7. [PMID: 26227344 DOI: 10.1002/lsm.22393] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2015] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVES Laser based therapies are the standard treatment protocol for port wine stain in the United States, but complete removal is infrequently achieved. Intense pulsed light (IPL) offers a broadband light spectrum approach as a viable treatment alternative. Previous studies suggest that IPL can be more effective in treatment of port wine stain by utilizing multiple wavelengths to selectively target different peaks in oxy- and deoxy-hemoglobin. Our study objectives were to (i) determine a characteristic radiant exposure able to achieve persistent vascular shutdown with narrowband IPL irradiation, (ii) determine the degree to which narrowband IPL irradiation can achieve persistent vascular shutdown, and (iii) compare the effectiveness of narrowband IPL radiation to single wavelength pulsed dye laser (PDL) irradiation in achieving persistent vascular shutdown. STUDY DESIGN/MATERIALS AND METHODS We utlized either single pulse or double, stacked pulses in narrowband IPL experiments, with the IPL operating over a 500-600 nm wavelength range on the rodent dorsal window chamber model. We compared the results from our narrowband IPL experiments to acquired PDL data from a previous study and determined that narrowband IPL treatments can also produce persistent vascular shutdown. We ran Monte Carlo simulations to investigate the relationship between absorbed energy, wavelength, and penetration depth. RESULTS For single and double pulse narrowband IPL irradiation we observed (i) little to no change in blood flow, resulting in no persistent vascular shutdown, (ii) marked acute disruption in blood flow and vascular structure, followed by partial to full recovery of blood flow, also resulting in no persistent vascular shutdown, and (iii) immediate changes in blood flow and vascular structure, resulting in prolonged and complete vascular shutdown. Monte Carlo modeling resulted in a 53.2% and 69.0% higher absorbed energy distribution in the top half and the total simulated vessel when comparing the composite narrowband IPL to the 595 nm (PDL), respectively. CONCLUSIONS Our data collectively demonstrate the potential to achieve removal of vascular lesions using a 500-600 nm range. Additionally, the narrowband IPL was tuned to optimize a specific wavelength range that can be used to treat PWS, whereas the PDL can only operate at one discrete wavelength.
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Affiliation(s)
- Wesley J Moy
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California.,Department of Biomedical Engineering, University of California, Irvine, California
| | - Joshua D Yakel
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California
| | - O Cecilia Osorio
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California
| | - Jocelynda Salvador
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California
| | - Carole Hayakawa
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California.,Department of Chemical Engineering and Materials Science, University of California, Irvine, California
| | - Kristen M Kelly
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California.,Department of Dermatology, University of California, Irvine, California.,Department of Surgery, University of California, Irvine, California
| | - Bernard Choi
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California.,Department of Biomedical Engineering, University of California, Irvine, California.,Department of Surgery, University of California, Irvine, California.,Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California, Irvine, California
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González-Rodríguez A, Lorente-Gual R. Current Indications and New Applications of Intense Pulsed Light. ACTAS DERMO-SIFILIOGRAFICAS 2015. [DOI: 10.1016/j.adengl.2015.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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González-Rodríguez A, Lorente-Gual R. Indicaciones actuales y nuevas aplicaciones de los sistemas de luz pulsada intensa. ACTAS DERMO-SIFILIOGRAFICAS 2015; 106:350-64. [DOI: 10.1016/j.ad.2014.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 08/26/2014] [Accepted: 10/03/2014] [Indexed: 10/24/2022] Open
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Wat H, Wu DC, Rao J, Goldman MP. Application of Intense Pulsed Light in the Treatment of Dermatologic Disease: A Systematic Review. Dermatol Surg 2014; 40:359-77. [DOI: 10.1111/dsu.12424] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bencini PL, Cazzaniga S, Galimberti MG, Zane C, Naldi L. Variables affecting clinical response to treatment of facial port-wine stains by flash lamp-pumped pulsed dye laser: the importance of looking beyond the skin. Lasers Med Sci 2014; 29:1365-70. [PMID: 24487956 DOI: 10.1007/s10103-014-1525-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 01/13/2014] [Indexed: 11/24/2022]
Abstract
The response of port-wine stains (PWS) to conventional laser treatment in adults is difficult to predict. To assess the influence of local or systemic hemodynamic variables on the clearance of PWS by using flash lamp-pumped pulsed (FLPP) dye laser. All consecutive patients ages 18 years or older undergoing laser treatment for a facial PWS were eligible. Laser sessions were scheduled every 8 weeks. All patients were evaluated based on a standard scale with four evaluation categories, from no or minimal improvement to total or almost total clearance. Clearance was achieved by 50.1 % (95 % confidence interval 35.6-64.7) of patients after a maximum of 15 treatment sessions. In multivariate analysis, increased age, a newly described Type III capillaroscopic pattern, and presence of lesions in dermatome V2 were all associated with a reduced clinical response to treatment. In a model restricted to demographic pattern and patient characteristics, arterial hypertension was also associated with a lower clinical response. A strong association was found between arterial hypertension and the Type III capillaroscopic pattern. Age, arterial hypertension, capillaroscopic pattern, and body location should be considered when planning laser treatment of PWS.
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Affiliation(s)
- Pier Luca Bencini
- Istituto di Chirurgia e Laserchirurgia in Dermatologia (I.C.L.I.D.), Milano, Italy
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Chen JK, Ghasri P, Aguilar G, van Drooge AM, Wolkerstorfer A, Kelly KM, Heger M. An overview of clinical and experimental treatment modalities for port wine stains. J Am Acad Dermatol 2012; 67:289-304. [PMID: 22305042 DOI: 10.1016/j.jaad.2011.11.938] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 10/15/2011] [Accepted: 11/10/2011] [Indexed: 01/03/2023]
Abstract
Port wine stains (PWS) are the most common vascular malformation of the skin, occurring in 0.3% to 0.5% of the population. Noninvasive laser irradiation with flashlamp-pumped pulsed dye lasers (selective photothermolysis) currently comprises the gold standard treatment of PWS; however, the majority of PWS fail to clear completely after selective photothermolysis. In this review, the clinically used PWS treatment modalities (pulsed dye lasers, alexandrite lasers, neodymium:yttrium-aluminum-garnet lasers, and intense pulsed light) and techniques (combination approaches, multiple passes, and epidermal cooling) are discussed. Retrospective analysis of clinical studies published between 1990 and 2011 was performed to determine therapeutic efficacies for each clinically used modality/technique. In addition, factors that have resulted in the high degree of therapeutic recalcitrance are identified, and emerging experimental treatment strategies are addressed, including the use of photodynamic therapy, immunomodulators, angiogenesis inhibitors, hypobaric pressure, and site-specific pharmaco-laser therapy.
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Affiliation(s)
- Jennifer K Chen
- Beckman Laser Institute and Medical Clinic, University of California, Irvine, California, USA
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An overview of three promising mechanical, optical, and biochemical engineering approaches to improve selective photothermolysis of refractory port wine stains. Ann Biomed Eng 2011; 40:486-506. [PMID: 22016324 PMCID: PMC3281205 DOI: 10.1007/s10439-011-0436-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Accepted: 10/06/2011] [Indexed: 11/25/2022]
Abstract
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 the PWS patient population responds suboptimally to laser treatment. Consequently, novel treatment modalities and therapeutic techniques/strategies are required to improve PWS treatment efficacy. This overview therefore focuses on three distinct experimental approaches for the optimization of PWS laser treatment. The approaches are addressed from the perspective of mechanical engineering (the use of local hypobaric pressure to induce vasodilation in the laser-irradiated dermal microcirculation), optical engineering (laser-speckle imaging of post-treatment flow in laser-treated PWS skin), and biochemical engineering (light- and heat-activatable liposomal drug delivery systems to enhance the extent of post-irradiation vascular occlusion).
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