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Gao C, Nguyen V, Hochman ML, Gao L, Chen EH, Friedman HI, Nelson JS, Tan W. Current clinical evidence is insufficient to support HMME-PDT as the first choice of treatment for young children with port wine birthmarks. Lasers Surg Med 2024; 56:321-333. [PMID: 38506454 DOI: 10.1002/lsm.23779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/09/2024] [Accepted: 03/12/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND Port wine birthmark (PWB) is a congenital vascular malformation of the skin. Pulsed dye laser (PDL) is the "gold standard" for the treatment of PWB globally. Hematoporphyrin monomethyl ether (HMME or hemoporfin)-mediated photodynamic therapy (HMME-PDT) has emerged as the first choice for PWB treatment, particularly for young children, in many major hospitals in China during the past several decades. AIM To evaluate whether HMME-PDT is superior to PDL by comparing the clinical efficacies of both modalities. METHOD PubMed records were searched for all relevant studies of PWB treatment using PDL (1988-2023) or HMME-PDT (2007-2023). Patient characteristics and clinical efficacies were extracted. Studies with a quartile percentage clearance or similar scale were included. A mean color clearance index (CI) per study was calculated and compared among groups. An overall CI (C0), with data weighted by cohort size, was used to evaluate the final efficacy for each modality. RESULT A total of 18 HMME-PDT studies with 3910 patients in China were eligible for inclusion in this analysis. Similarly, 40 PDL studies with 5094 patients from nine different countries were eligible for inclusion in this analysis. Over 58% of patients in the HMME-PDT studies were minors (<18 years old). A significant portion (21.3%) were young children (<3 years old). Similarly, 33.2% of patients in the PDL studies were minors. A small proportion (9.3%) was young children. The overall clearance rates for PDL were slightly, but not significantly, higher than those for HMME-PDT in cohorts with patients of all ages (C0, 0.54 vs. 0.48, p = 0.733), subpopulations with only minors (C0, 0.54 vs. 0.46, p = 0.714), and young children (C0, 0.67 vs. 0.50, p = 0.081). Regrettably, there was a lack of long-term data on follow-up evaluations for efficacy and impact of HMME-PDT on young children in general, and central nervous system development in particular, because their blood-brain barriers have a greater permeability as compared to adults. CONCLUSION PDL shows overall albeit insignificantly higher clearance rates than HMME-PDT in patients of all ages; particularly statistical significance is nearly achieved in young children. Collectively, current evidence is insufficient to support HMME-PDT as the first choice of treatment of PWBs in young children given: (1) overall inferior efficacy as compared to PDL; (2) risk of off-target exposure to meningeal vasculature during the procedure; (3) administration of steriods for mitigation of side effects; -and (4) lack of long-term data on the potential impact of HMME on central nervous system development in young children.
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Affiliation(s)
- Chao Gao
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina, USA
| | - Vi Nguyen
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina, USA
| | - Marcelo L Hochman
- The Facial Surgery Center and the Hemangioma & Malformation Treatment Center, Charleston, South Carolina, USA
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Lin Gao
- Department of Dermatology, XiJing Hospital, Xi'an, Shaanxi, China
| | - Elliott H Chen
- Division of Plastic Surgery, School of Medicine, University of South Carolina, Columbia, South Carolina, USA
- Division of Plastic Surgery, Prisma Health Medical Group, Columbia, South Carolina, USA
| | - Harold I Friedman
- Division of Plastic Surgery, School of Medicine, University of South Carolina, Columbia, South Carolina, USA
- Division of Plastic Surgery, Prisma Health Medical Group, Columbia, South Carolina, USA
| | - John Stuart Nelson
- Departments of Surgery and Biomedical Engineering, Beckman Laser Institute and Medical Clinic, University of California, Irvine, Irvine, California, USA
| | - Wenbin Tan
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina, USA
- Department of Biomedical Engineering, College of Engineering and Computing, University of South Carolina, Columbia, South Carolina, USA
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Shimanouchi K, Rikihisa N, Saito Y, Iuchi K, Tsumura N, Sakai H, Mitsukawa N. Artificial red blood cells increase large vessel wall damage and decrease surrounding dermal tissue damage in a rabbit auricle model after subsequent flashlamp-pumped pulsed-dye laser treatment. J Dermatol 2021; 48:600-612. [PMID: 33630391 DOI: 10.1111/1346-8138.15805] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 01/19/2023]
Abstract
Artificial red blood cells (i.e. hemoglobin [Hb] vesicles [Hb-Vs]) function effectively as photosensitizers in flashlamp-pumped pulsed-dye laser (PDL) treatment for port-wine stains in animal models. Hb-Vs deliver more Hb to the vicinity of the endothelial cells. Both Hb-Vs and red blood cells absorb the laser energy and generate heat, supporting the removal of very small blood vessels and deeper subcutaneous blood vessels with PDL irradiation in in vivo experiments. Here, we analyzed the photosensitizing effect of Hb-Vs in PDL irradiation on large blood vessels and surrounding soft tissues. We histopathologically analyzed markers of damage to the large vessels and surrounding dermal tissue in a rabbit auricle model following PDL irradiation alone or subsequent to the addition of intravenous Hb-V injection. Markers were graded on a five-point scale and statistically compared. The changes in laser light absorption and reflection in a human skin model caused by the administration of Hb-Vs were evaluated using Monte Carlo light-scattering programs. Histological markers of damage to blood vessels were significantly greater in Hb-V-injected arteries and veins measuring 1-3 mm in diameter as compared with the controls. However, Hb-V injection significantly reduced PDL-induced necrosis and hemorrhage in the surrounding tissues. During computer simulation, photon absorption increased within the vessel layer and decreased around the layer. Intravenous Hb-Vs increase the extent of damage in larger vessel walls but significantly reduce damage to the surrounding skin after subsequent PDL irradiation. These beneficial effects are the result of improving vessel selectivity by Hb-Vs in vessels. Hb-V administration prior to PDL irradiation therapy could mechanically improve the outcomes and safety profiles of port-wine stain treatment protocols.
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Affiliation(s)
- Kae Shimanouchi
- Department of Plastic, Reconstructive, and Aesthetic Surgery, Chiba University Hospital, Chiba, Japan
| | | | - Yoshiaki Saito
- Laboratory of Pathology, Hatano Research Institute, Food and Drug Safety Center, Hatano, Japan
| | - Kaito Iuchi
- Department of Imaging Sciences, Chiba University, Chiba, Japan
| | | | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, Nara, Japan
| | - Nobuyuki Mitsukawa
- Department of Plastic, Reconstructive, and Aesthetic Surgery, Chiba University Graduate School of Medicine, Chiba, Japan
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Wang M, Qin Y, Wang T, Orringer JS, Paulus YM, Yang X, Wang X. Removing Subcutaneous Microvessels Using Photo-Mediated Ultrasound Therapy. Lasers Surg Med 2020; 52:984-992. [PMID: 32394475 PMCID: PMC7655656 DOI: 10.1002/lsm.23260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND OBJECTIVES We have developed a novel anti-vascular technique, termed photo-mediated ultrasound therapy (PUT), which utilizes nanosecond duration laser pulses synchronized with ultrasound bursts to remove the microvasculature through cavitation. The objective of the current study is to explore the potential of PUT in removing subcutaneous microvessels. STUDY DESIGN/MATERIALS AND METHODS The auricular blood vessels of two New Zealand white rabbits were treated by PUT with a peak negative ultrasound pressure of 0.45 MPa at 0.5 MHz, and a laser fluence of 0.056 J/cm2 at 1064 nm for 10 minutes. Blood perfusion in the treated area was measured by a commercial laser speckle imaging (LSI) system before and immediately after treatment, as well as at 1 hour, 3 days, 2 weeks, and 4 weeks post-treatment. Perfusion rates of 38 individual vessels from four rabbit ears were tracked during this time period for longitudinal assessment. RESULTS The measured perfusion rates of the vessels in the treated areas, as quantified by the relative change in perfusion rate, showed a statistically significant decrease for all time points post-treatment (P < 0.001). The mean decrease in perfusion is 50.79% immediately after treatment and is 32.14% at 4 weeks post-treatment. Immediately after treatment, the perfusion rate decreased rapidly. Following this, there was a partial recovery in perfusion rate up to 3 days post-treatment, followed by a plateau in the perfusion from 3 days to 4 weeks. CONCLUSIONS This study demonstrated that a single PUT treatment could significantly reduce blood perfusion by 32.14% in the skin for up to 4 weeks. With unique advantages such as low laser fluence as compared with photothermolysis and agent-free treatment as compared with photodynamic therapy, PUT holds the potential to be developed into a new tool for the treatment of cutaneous vascular lesions. Lasers Surg. Med. © 2020 Wiley Periodicals, LLC.
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Affiliation(s)
- Mingyang Wang
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, Michigan, 48109
| | - Yu Qin
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, Michigan, 48109
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, No.1239, Siping Road, Shanghai, 200092, China
| | - Tao Wang
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, Michigan, 48109
- Institution of Biomedical Engineering, Chinese Academy of Medical Science & Peking Union Medical College, 236 Baidi Road, Tianjin, 300192, China
| | - Jeffrey S Orringer
- Department of Dermatology, University of Michigan, 1910 Taubman Center, 1500 E. Medical Center Drive, Ann Arbor, Michigan, 48109
| | - Yannis M Paulus
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, Michigan, 48109
- Department of Ophthalmology and Visual Sciences, University of Michigan, W.K. Kellogg Eye Center, 1000 Wall Street, Ann Arbor, Michigan, 48109
| | - Xinmai Yang
- Institute for Bioengineering Research and Department of Mechanical Engineering, University of Kansas, 1530 W.15th Street, 3138 Learned Hall, Lawrence, Kansas, 66045
| | - Xueding Wang
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Blvd, Ann Arbor, Michigan, 48109
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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: 31] [Impact Index Per Article: 6.2] [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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Rikihisa N, Watanabe S, Saito Y, Sakai H. Artificial Red Blood Cells as Potential Photosensitizers in Dye Laser Treatment Against Port-Wine Stains. J Funct Biomater 2017; 8:jfb8020014. [PMID: 28406466 PMCID: PMC5491995 DOI: 10.3390/jfb8020014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 03/29/2017] [Accepted: 04/10/2017] [Indexed: 01/15/2023] Open
Abstract
We suggest a novel method that uses artificial blood cells (hemoglobin vesicles, Hb-Vs) as photosensitizers in dye laser treatment (at 595-nm wavelength) for port-wine stains (i.e., capillary malformations presenting as red birthmarks) based on the results of animal experiments. As compared with human red blood cells, Hb-Vs have the same absorbance of 595 nm wavelength light and produce the same level of heat following dye laser irradiation. Small sized Hb-Vs (250 nm) distribute in the plasma phase in blood and tend to flow in the marginal zone of microvessels. Intravenous injections of Hb-Vs caused the dilatation of microvessels, and dye laser treatment with Hb-Vs destroyed the vessel wall effectively. Following the intravenous injection of Hb-Vs, the microvessels contained more Hb that absorbed laser photons and produced heat. This extra Hb tended to flow near the endothelial cells, which were the target of the laser treatment. These attributes of Hb-Vs will potentially contribute to enhancing the efficacy of dye laser treatment for port-wine stains. Hemoglobin is a type of porphyrin. Thus, our proposed treatment may have aspects of photodynamic therapy using porphyrin that leads to a cytotoxicity effect by active oxygen.
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Affiliation(s)
- Naoaki Rikihisa
- Chiba Rosai Hospital, 1-16 Tatsumidaihigashi, Ichihara, Chiba 290003, Japan.
| | - Shoji Watanabe
- Saitama Children's Medical Center, 1-2 Shintoshin Chuo-ku Saitama, Saitama 330877, Japan.
| | - Yoshiaki Saito
- The Laboratory of Pathology, Hatano Research Institute, Food and Drug Safety Center, 729-5 Ochiai Hatano, Kanagawa 2578523, Japan.
| | - Hiromi Sakai
- Department of Chemistry, Nara Medical University, 840 Shijo-cho, Kashihara 6340813, Japan.
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Chlebicki CA, Protsenko DE, Wong BJ. Preliminary investigations on therapy thresholds for laser dosimetry, cryogen spray cooling duration, and treatment cycles for laser cartilage reshaping in the New Zealand white rabbit auricle. Lasers Med Sci 2014; 29:1099-109. [PMID: 24202858 PMCID: PMC4040347 DOI: 10.1007/s10103-013-1471-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Accepted: 10/13/2013] [Indexed: 10/26/2022]
Abstract
Previous studies have demonstrated the feasibility of laser irradiation (λ = 1.45 μm) in tandem with cryogen spray cooling (CSC) to reshape rabbit auricular cartilage using a total energy density of 14 J/cm(2). The aim of this study was to further explore and identify the dosimetry parameter space for laser output energy, CSC duration, and treatment cycles required to achieve shape change while limiting skin and cartilage injury. Ten New Zealand white rabbits were treated with the 1.45 μm diode laser combined with cryogen spray cooling (Candela Smoothbeam™, Candela Co., Wayland, MA, USA). The ear's central portion was bent around a cylindrical jig and irradiated in consecutive spots of 6 mm diameter (13 or 14 J/cm(2) per spot) along three rows encompassing the bend. CSC was delivered during irradiation in cycles consisting of 25-35 ms. At thin and thick portions of the ear, 4-7 and 6-10 treatment cycles were delivered, respectively. After surgery, ears were examined and splinted for 6 weeks. Treatment parameters resulting in acceptable (grades 1 and 2) and unacceptable (grade 3) skin injuries for thick and thin regions were identified, and shape change was observed. Confocal and histological analysis of cartilage tissue revealed several outcomes correlating to laser dosimetry, CSC duration, and treatment cycles. These outcomes included expansion of cartilage layers (thickening), partial cartilage injuries, and full-thickness cartilage injuries. We determined therapy thresholds for laser output energy, cryogen spray cooling duration, and treatment cycles in the rabbit auricular model. These parameters are a starting point for future clinical procedures aimed at correcting external ear deformities.
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Affiliation(s)
- Cara A. Chlebicki
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Road East, Irvine, California 92612
| | - Dmitry E. Protsenko
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Road East, Irvine, California 92612
| | - Brian J. Wong
- Beckman Laser Institute and Medical Clinic, University of California Irvine, 1002 Health Sciences Road East, Irvine, California 92612
- Department of Otolaryngology, Head and Neck Surgery, University of California Irvine, 101 The City Drive, Orange, California 92668
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Savas JA, Ledon JA, Franca K, Chacon A, Nouri K. Pulsed dye laser-resistant port-wine stains: mechanisms of resistance and implications for treatment. Br J Dermatol 2013; 168:941-53. [PMID: 23290045 DOI: 10.1111/bjd.12204] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Port-wine stains (PWS) are among the most common congenital vascular malformations. Unlike capillary haemangiomas, these lesions do not involute spontaneously but rather become progressively more disfiguring as the patient ages. While benign in nature, the cosmetic deformity and attendant psychological and emotional distress prompt the majority of those afflicted to seek treatment. The pulsed dye laser (PDL) has long been considered the treatment of choice for these vascular lesions; however, very few patients achieve total clearance with PDL therapy and a significant number of lesions fail to respond at all. In order to address these recalcitrant cases, the mechanisms that contribute to treatment resistance must be understood and novel laser and light therapies must be employed. This review will address what is currently known about lesion-specific characteristics of PDL-resistant PWS as well as discuss current and future treatment options.
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Affiliation(s)
- J A Savas
- Department of Dermatology and Cutaneous Surgery, University of Miami Leonard M. Miller School of Medicine, Miami, FL 33136, USA.
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9
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Liu S, Yang C, Yang S. Long-pulsed 1,064-nm high-energy dye laser improves resistant port wine stains: 20 report cases. Lasers Med Sci 2012; 27:1225-7. [DOI: 10.1007/s10103-012-1098-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 04/09/2012] [Indexed: 11/24/2022]
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10
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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: 122] [Impact Index Per Article: 10.2] [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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