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Nunes A, Azevedo P, Carreira LM. The phenomenon of skin contraction in CO 2 LASER surgical incisions using superpulse and continuous emission mode - preliminary study. Lasers Med Sci 2024; 39:117. [PMID: 38678503 DOI: 10.1007/s10103-024-04065-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 04/19/2024] [Indexed: 05/01/2024]
Abstract
The skin contraction phenomenon occurs due to the energy emitted by the surgical CO2 LASER affecting the collagen architecture and intracellular water content in tissues. The study aimed to assess how gender, age, breed, body-weight, CO2 LASER emission mode, and potency influence skin contraction following the incision. The study involved 80 dogs (N = 80) of both genders, multiple breeds, undergoing major surgery with CO2 LASER. Subjects were grouped based on LASER potency (12 or 15 Watts) and emission mode (Superpulse-SP or Continuous-CT): GSP12, GSP15, GCT12, and GCT15. A 10 mm incision was performed using the surgical CO2 LASER beam, consistently employing a focal point of 0.4 mm, positioned at a distance of 1 mm from the skin surface, and always maintained perpendicular to it, and resulting lengths measured with a digital caliper. Results were considered significant for p-value < 0.05. GSP12 showed minimal contraction, while GCT15 exhibited the most significant. Male subjects in GCT12, GCT15, and GSP12 experienced less contraction than females. Purebred dogs had greater contraction than mixed breeds. GSP12 individuals showed age-related contraction decrease (p < 0.01), with skin contracting by 0.09 mm per year. Weight and skin contraction trended towards significance (p = 0.06), with a 0.02 mm increase per unit weight. For a constant power of 12 W, the analysis of the relationship between the emission mode of the LASER beam and the final skin contraction (GSP12 vs. GCT12) revealed statistically significant differences (p < 0.01). This study suggests that the use of the Continuous mode of LASER emission, regardless of the power used, is associated with a higher level of final skin contraction. TRIAL REGISTRATION NUMBER AND DATE OF REGISTRATION FOR PROSPECTIVELY REGISTERED TRIALS: Project approval registration number by the Research and Teaching Ethics Committee (CEIE),Faculty of Veterinary Medicine-University of Lisbon (FMV_ULisboa), Lisboa-Portugal, N/Refª 015/2022.
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Affiliation(s)
- A Nunes
- Anjos of Assis Veterinary Medicine Centre (CMVAA), Barreiro, Portugal
| | - P Azevedo
- Anjos of Assis Veterinary Medicine Centre (CMVAA), Barreiro, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), Lisbon, Portugal
| | - L Miguel Carreira
- Anjos of Assis Veterinary Medicine Centre (CMVAA), Barreiro, Portugal.
- Department of Clinics, Surgery Faculty of Veterinary Medicine, University of Lisbon (FMV_ULisboa), 1300, Lisbon, Portugal.
- Centre for Interdisciplinary Research in Animal Health, FMV-ULisboa, Lisbon, Portugal.
- Laboratório Associado Para a Ciência Animal E Veterinária (AL4AnimalS), Lisbon, Portugal.
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), Lisbon, Portugal.
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2
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Gentile RD. Ultrasonic Deep-Plane Neck Lift. Facial Plast Surg 2023. [PMID: 38122804 DOI: 10.1055/s-0043-1777409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Abstract
Ultrasonic deep-plane neck lift is a new approach for addressing both the subsuperficial musculoaponeurotic system and subplatysmal soft tissues during facial rejuvenation procedures. This innovative surgical approach utilizes 2.2, 2.9, and 3.7 stainless steel probes that are powered by high-frequency ultrasound. Using high-frequency ultrasound in the subcutaneous spaces has been accomplished for the past 20 years with a very suitable safety profile. In this technique, emulsification of the fat layer in both the superficial and deep planes is accomplished with tumescence of the soft tissues in the same fashion as subcutaneous liposuction. In ultrasonic deep-plane neck lift, the superficial and deep layers of fat are targeted for emulsification, and this creates a loosening of these spaces for lifting and repositioning. The procedure facilitates more accurate surgery, because the tissue effects include hemostasis and scalpel- and scissor-free undermining due to the emulsification of the fat layers of the face and neck. The other advantages of ultrasound-assisted facial contouring and rejuvenation include treatment of hard-to-treat areas like the perioral region and distal neck, which can be rapidly and safely undermined utilizing this technology. The third component of ultrasound- and energy-based facial rejuvenation surgery is the long-term remodeling and tightening that occurs beginning approximately 8 weeks after the procedure. When many conventional facelifts are beginning to fall at 3 to 4 months postoperatively, the energy-based facelifts are still tightening and this remodeling continues for up to a year after the procedure. Combining technology with conventional facelift procedures is a new approach to facial rejuvenation and is the result of 15 years of research and cooperation with the aesthetic device industry. The result of this merger of technology with conventional surgery is TESLA Facelifting, the facelift of the future.
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Zhu B, Liu C, Zhang L, Wang J, Chen M, Wei Y. Comparison of NB-UVB combination therapy regimens for vitiligo: A systematic review and network meta-analysis. J Cosmet Dermatol 2023; 22:1083-1098. [PMID: 36456176 DOI: 10.1111/jocd.15534] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 11/14/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Vitiligo was an autoimmune disease and some guidelines for the management of vitiligo encouraged the use of NB-UVB combination therapies to enhance repigmentation. OBJECTIVES To compare the effectiveness of current NB-UVB combination regimen at the improvement in repigmentation through a systematic review and network meta-analysis. METHODS We searched the electronic databases for randomized controlled trials related to NB-UVB combination therapy for vitiligo till October 2022. STATA15.0 software was applied to carrying out data analysis. RESULTS A total of 28 eligible studies involving 1194 participants were enrolled in the analysis. The NMA results revealed that compared with NB-UVB, carboxytherapy [OR = 32.35, 95% CI (1.79, 586.05)], Er: YAG laser+ topical 5% 5-FU [OR = 10.74, 95% CI (4.05, 28.49)], needling/micro-needling [OR = 3.42, 95% CI (1.18, 9.88)], betamethasone intramuscular injection [OR = 3.08, 95% CI (1.17, 8.13)], topical tacrolimus [OR = 2.54, 95% CI (1.30, 4.94)], and oral Chinese herbal medicine compound [OR = 2.51, 95% CI (1.40, 4.50)] integrated with NB-UVB were more efficacious in excellent to complete repigmentation response rate (≥75%). Besides, NB-UVB+ Er: YAG laser+ topical 5% 5-FU [OR = 0.17, 95% CI (0.04, 0.67)] and NB-UVB+ needling/micro-needling [OR = 0.24, 95% CI (0.06, 0.88)] were less likely evaluated as ineffective repigmentation response (≤25%). CONCLUSIONS All combination therapies ranked higher than NB-UVB monotherapy in inducing successful repigmentation and avoiding failed treatment in patients with vitiligo. Comprehensive consideration, NB-UVB+ Er: YAG laser+ topical 5% 5-FU and NB-UVB+ needling/microneedling would be the preferred therapeutic approaches.
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Affiliation(s)
- Baohua Zhu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Chengjiang Liu
- Department of General Medicine, Affiliated Anqing First People's Hospital of Anhui Medical University, Anqing, China
| | - Lan Zhang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jun Wang
- Chengdu Women's and Children's Central Hospital, Chengdu, China
| | - Mingling Chen
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yuegang Wei
- Nanjing University of Chinese Medicine, Nanjing, China
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4
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Helou J, Soutou B, Maatouk I, Merhy R, Assaf J, Sarkis AS, Jabbour R, Kaikati J, Tomb R. Beneficial UVB phototherapy preceding a fractional CO 2 laser-UVB protocol in refractory non-segmental vitiligo. J Cosmet Dermatol 2022; 21:6783-6787. [PMID: 36121343 DOI: 10.1111/jocd.15396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 09/16/2022] [Indexed: 01/06/2023]
Abstract
OBJECTIVES To explore the short- and long-term effects of UVB phototherapy preceding a fractional CO2 laser-UVB protocol in patients with resistant nonsegmental vitiligo. MATERIALS AND METHODS This single-center, prospective, split-face/body, evaluator-blinded study included adult patients with stable vitiligo refractory to conventional treatments. Two symmetrical lesions were selected. Phototherapy was delivered with one side covered, until minimal erythema. Within 3 days, 31-month-apart sessions of laser were performed on both sides. After each laser session, phototherapy was resumed three times weekly, with all lesions uncovered, until 8 weeks after the last laser session. At baseline, at the end of treatment, and 5 years later, a Mean Improvement Score by Physician (MISP) and a patient satisfaction 10-point visual analog score (VAS) were recorded. RESULTS Ten patients (8 women and 2 men) were included; their mean age was 32.9 years; phototype III was predominant; the mean duration of vitiligo was 3 years. At the end of treatment and 5 years later, scores of lesions treated with UVB-CO2 -UVB (mean MISP 3.0 and 2.9, mean ΔVAS 4.5 and 3.9, respectively), were higher than those of lesions treated only with CO2 -UVB (mean MISP 2.5 and 2.4, mean ΔVAS 4.1 and 3.6, respectively). After 5 years, one patient lost his partial response and two patients developed light hyperpigmentation on both sides. CONCLUSION Exposure to UVB before CO2 -UVB explains the higher scores as it was the only variable between the two sides. It may improve the response of resistant lesions with a constantly sustained result over 5 years.
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Affiliation(s)
- Josiane Helou
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Boutros Soutou
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Ismael Maatouk
- Dermatology department, Clemenceau Medical center affiliated with Johns Hopkins, Beirut, Lebanon
| | - Reine Merhy
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Joy Assaf
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Anne-Sophie Sarkis
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Rita Jabbour
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Jérôme Kaikati
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
| | - Roland Tomb
- School of Medicine, Université Saint-Joseph, Beirut, Lebanon.,Dermatology Department, Hôtel-Dieu de France Hospital, Beirut, Lebanon
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5
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Gentile R. Tesla Facelifting Using Energy Devices during Rhytidectomy. Facial Plast Surg 2022; 38:668-678. [PMID: 36563675 DOI: 10.1055/s-0042-1757758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Tesla facelifting is the process of utilizing energy devices as surgical tools during rhytidectomy and neck lifting. Devices used for Tesla face and neck lifting include fiber lasers, radio frequency devices, high-frequency ultrasound, and plasma energy devices. Advantage of Tesla face and neck lifting include better visualization for surgical intervention due to reduced bleeding, better access to hard to access facial and neck locations, and long-term skin tightening from the subdermal energy treatment.
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Weshahy R, Abdelhamid MF, Sayed KS, El Desouky ED, Ramez SA. Efficacy and safety of combined fractional ablative CO 2 laser and 5 fluorouracil in the treatment of acral vitiligo: An open, uncontrolled study. J Cosmet Dermatol 2022; 21:5636-5641. [PMID: 35621236 DOI: 10.1111/jocd.15116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/13/2022] [Accepted: 05/20/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND Acral lesions of vitiligo are most likely recalcitrant to the known lines of treatment. Ablative fractional CO2 has shown efficacy in treatment of vitiligo in combination with other modalities. METHODS Thirty non-segmental vitiligo patients with acral lesion were included in the study. Each patient was subjected to fractional Carbon Dioxide Laser Treatment followed by application of 5 fluorouracil (5FU) cream for five consecutive days. Evaluation was done 3 weeks from the start of treatment and 12 weeks after the last treatment session using VESTA score, evaluation of patients' photos by blinded investigation in addition to patients' satisfaction scores. RESULTS Patients showed significant improvement of Vitiligo extent score for a target area (VESTA) score and developed considerable degree of repigmentation as assessed by blinded investigators. CONCLUSION The combination of fractional ablative CO2 and 5FU is an effective and safe procedure for the treatment of acral vitiligo with promising results offering patients a new therapeutic window.
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Affiliation(s)
- Ragia Weshahy
- Dermatology and Venereology Research Department, Medical Research and Clinical Studies Institute- National Research Center, Cairo, Egypt
| | - Mahmoud F Abdelhamid
- Dermatology and Venereology Research Department, Medical Research and Clinical Studies Institute- National Research Center, Cairo, Egypt
| | - Khadiga S Sayed
- Dermatology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
| | | | - Shahenda A Ramez
- Dermatology and Venereology Research Department, Medical Research and Clinical Studies Institute- National Research Center, Cairo, Egypt
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Post NF, Ezekwe N, Narayan VS, Bekkenk MW, Van Geel N, Hamzavi I, Passeron T, Wolkerstorfer A. The use of lasers in vitiligo, an overview. J Eur Acad Dermatol Venereol 2022; 36:779-789. [PMID: 35176186 PMCID: PMC9314124 DOI: 10.1111/jdv.18005] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 12/10/2021] [Accepted: 02/03/2022] [Indexed: 11/27/2022]
Abstract
Various types of lasers have been demonstrated to be effective in the treatment of vitiligo. The mode of action of these lasers is just as varied as the purpose of intervention. Many clinicians are not aware of the unique opportunity these lasers offer to improve the outcomes of vitiligo treatment. To date, no clear overview exists of the use of lasers in vitiligo treatment. Thus, the aim of this review is to discuss the various types of lasers and provide an overview of the evidence for their efficacy. We found good evidence from a systematic review that the excimer laser is effective, induces repigmentation rates comparable to NB‐UVB and has improved outcomes when combined with calcineurin inhibitors. Ablative lasers are commonly used for tissue graft or melanocyte–keratinocyte cell graft transplantation. They provide safe, fast and uniform denudation of the epidermis with propitious repigmentation outcomes. We found conflicting evidence from two systematic reviews regarding the efficacy of fractional ablative lasers for improving outcomes of NB‐UVB therapy, a systematic review including only fractional ablative lasers provided evidence for efficacy. Q‐switched nanosecond lasers have shown to be safe and effective for inducing depigmentation, although recurrence is common, and most studies were small and retrospective. Despite proven efficacy and safety, laser treatments are relatively expensive and suited for limited body surface areas and selected cases. Each type of laser has benefits and risks associated and should, therefore, be individually chosen based on location, extent, activity and type of vitiligo.
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Affiliation(s)
- N F Post
- Department of dermatology, Amsterdam University Medical Centers, The Netherlands
| | - N Ezekwe
- Department of Dermatology, Henry Ford Health System, Detroit, MI, USA
| | - V S Narayan
- Department of dermatology, Amsterdam University Medical Centers, The Netherlands
| | - M W Bekkenk
- Department of dermatology, Amsterdam University Medical Centers, The Netherlands
| | - N Van Geel
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - I Hamzavi
- Department of Dermatology, Henry Ford Health System, Detroit, MI, USA
| | - T Passeron
- Department of Dermatology and INSERM U1065, University Hospital of Nice, France
| | - A Wolkerstorfer
- Department of dermatology, Amsterdam University Medical Centers, The Netherlands
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8
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Elgarhy LH, El-Tatawy RA, Ali DM, Anber DM, Iskandarani YA, Ismail MA. Treatment of stable nonsegmental vitiligo using transdermal delivery of 5-fluorouracil by fractional CO 2 laser versus intralesional injection of 5-fluorouracil, both followed by narrow-band type ultraviolet B (UVB): A comparative study. J Cosmet Dermatol 2022; 21:3832-3841. [PMID: 35005831 DOI: 10.1111/jocd.14691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 12/02/2021] [Accepted: 12/03/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Updates of treatment methods of stable vitiligo are needed to give better outcomes with a shorter duration of treatment. OBJECTIVE To test the effect of transdermal 5-fluorouracil (5-FU) delivery using fractional CO2 (FrCO2 ) laser versus intralesional 5-FU injection, with narrow-band type ultraviolet B (UVB) (NB-UVB) therapy after both, in the treatment of stable vitiligo. PATIENTS AND METHODS The present study comprised 40 patients with nearly symmetrical stable vitiligo lesions. The left side was treated with FrCO2 laser followed by topical 5-FU (FrCO2 + 5-FU), while the right side was treated with 5-FU intradermal injection. Both procedures were done at 2-week intervals for 3 sessions followed by 24 sessions of narrow-band UVB for both sides. RESULTS Repigmentation was demonstrated on the left side of 90% of patients and the right side of 85% of patients. As much as >50% improvement was demonstrated on the left side of 50% of patients, and the right side of 55% of patients. Intralesional 5-FU showed a statistically significant difference in repigmentation compared to FrCO2 + 5-FU. CONCLUSION Both 5-FU injection and FrCO2 + 5-FU were effective therapeutic modalities for vitiligo. Patients were more compliant with FrCO2 + 5-FU.
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Affiliation(s)
- Lamia H Elgarhy
- Dermatology and Venereology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Rania A El-Tatawy
- Dermatology and Venereology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Dareen M Ali
- Pathology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Doha M Anber
- Dermatology and Venereology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Mayada A Ismail
- Dermatology and Venereology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
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9
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Kim H, Lee S, Cho M, Han Y, Woo Y, Cho S, Lee J. Laser-induced mottled hypopigmentation successfully treated with a combined regimen of topical calcineurin inhibitors and fractional CO 2 laser. DERMATOL SIN 2022. [DOI: 10.4103/ds.ds_2_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Jordão JM, Stoliar MFF, Melo SS, de Campos GLM, de Forville Mesquita LA, Skare TL. Low-fluence and low-density CO2 laser: histological analysis of collagen fiber changes in skin and its clinical repercussions in photorejuvenation. Lasers Med Sci 2021; 37:905-911. [PMID: 34009520 DOI: 10.1007/s10103-021-03330-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 05/03/2021] [Indexed: 10/21/2022]
Abstract
This study refers to clinical and histologic analysis of effects on photorejuvenation after one single treatment of fractional CO2 laser with low fluence and low density. To analyze histologically the quantitative variation of collagen fibers type I and III, elastic fibers, and epidermal thickness on D84, besides clinical evaluation of amount, length, thickness, and depth of periocular wrinkles during the same period. This is an open, prospective, interventional study. There were 40 healthy female with age between 35 and 65 years. Twenty-six participants were randomly selected for D0 and D84 biopsy. A single session of fractional CO2 laser was done in the hole face, using a 800-µm tip, 5% density, and 10 mJ fluence with a single pass. On D0, D42, and D84, a clinical comparative analysis of amount, length, depth, and thickness of periocular wrinkles has been done. On histological analysis, a comparative quantitative evaluation of collagen fibers type I and III, elastic fibers, and epidermal thickness has been done on D0 and D84. The results of this study denoted a significant clinical improvement of amount (- 32.17%; p < 0.0001), thickness (- 33%; p < 0.0001), lenght (- 35.84%; p < 0.0001), and depth of periocular wrinkles (- 32.46%; p < 0.0001). A significant increase in the amount of collagen fibers type III was observed on D84 (+ 60.67%; p = 0.0013). Collagen fibers type I and elastic fibers did not have the same result, with a nonsignificant increase (+ 8.31%; p = 0.3820) and a decrease (- 12.4%; p = 0.0585) respectively. Epidermal thickness has a tendency to significant variation (p = 0.05553). The results demonstrate that fractional CO2 laser with low fluence and low density is a safe and efficient option for photorejuvenation of the face.
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Affiliation(s)
- Juliana Merheb Jordão
- Head of Laser Therapy Dermatology Department, Hospital Universitário Evangélico Mackenzie, Curitiba, PR, Brazil.
| | | | - Sarah Sanches Melo
- Dermatology Department, Hospital Universitário Evangélico Mackenzie, Curitiba, PR, Brazil
| | | | | | - Thelma Larocca Skare
- Rheumatology Department, Hospital Universitário Evangélico Mackenzie, Curitiba, PR, Brazil
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11
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Badreddine AH, Couitt S, Kerbage C. Histopathological and biomechanical changes in soft palate in response to non-ablative 9.3-μm CO 2 laser irradiation: an in vivo study. Lasers Med Sci 2021; 36:413-420. [PMID: 32621126 DOI: 10.1007/s10103-020-03087-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 06/23/2020] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to investigate in vivo the biomechanical and morphological changes in soft palates of Wistar rats from non-ablative irradiation with a 9.3-μm CO2 laser. A blinded, randomized, controlled study was designed with 45 Wistar rats categorized into treated and control sets. The treated set was exposed to 9.3-μm CO2 laser irradiation at an average power of 1.0 W and a single pulse fluence of 0.16 J/cm2 scanned using an automated system at a repetition rate of 315 Hz in a patterned area covering 0.4 cm2 in 6 s. The tissue of each animal was excised and divided into two halves. One-half was sectioned for histopathology, and the other half was used to measure tissue stiffness, which was reported as the effective Young's modulus. Measurements for both sets were taken at three time points: days 1, 21, and 35. There were no significant adverse events or changes in the behavior of the rats over the duration of the study. The treated set exhibited an order of magnitude increase in stiffness relative to the controls, which was maintained over the three time points. Histopathology showed a moderate contraction/disruption of the lamina propria collagen observed at day 1 and collagen accumulation observed at days 21 and 35 in the tissue remodeling phase. Non-ablative 9.3-μm CO2 laser irradiation can safely increase oral mucosal stiffness and can be used as an effective treatment to reduce tissue vibrations that are associated with snoring.
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12
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Bakr RM, Abdel-Gaber RM, Tawfik YM. A comparative study on the use of fractional CO 2 laser with tacrolimus or calcipotriol or narrow band ultraviolet-B in treatment of stable nonsegmental vitiligo. Dermatol Ther 2020; 34:e14604. [PMID: 33249712 DOI: 10.1111/dth.14604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/10/2020] [Accepted: 11/23/2020] [Indexed: 11/28/2022]
Abstract
Conventional methods of treatment for vitiligo are often unsatisfactory to the patients and time consuming, new treatment modalities are needed. This study was conducted to evaluate the efficacy and safety of fractional carbon dioxide (CO2 ) laser therapy followed by narrow band ultraviolet-B (NB-UVB) phototherapy, topical tacrolimus or topical calcipotriol on stable nonsegmental vitiligo. Thirty patients with stable nonsegmental vitiligo were evaluated. All patients were subjected to three sessions of fractional CO2 laser 1 month apart. Patients were divided into three groups (each group 10 patients). Group (A) treated with tacrolimus ointment twice daily for 3 months, group (B) treated with calcipotriol ointment twice daily for 3 months, and group (C) treated with NB-UVB twice weekly for 3 months. Outcomes were evaluated by calculating vitiligo area scoring index (VASI) score change, percentage of repigmentation, patient satisfaction, and adverse effects. There was a statistical significant decrease in VASI score after treatment in the three groups. The VASI change and % of regimentation was higher in group (C) treated by laser and NB-UVB and this was significantly higher than group (B) treated with laser and calcipotriol. Otherwise, there was no statistical significant difference between other treatment groups. In concluion, NB-UVB phototherapy, topical tacrolimus, or topical calcipotriol in combination with fractional CO2 laser could be used effectively and safely as an alternative modality for treatment of vitiligo. The combination of fractional CO2 laser and NB-UVB was found to be more effective.
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Affiliation(s)
- Radwa M Bakr
- Department of Dermatology, Venereology and Andrology, Assiut University, Assiut, Egypt
| | - Reham M Abdel-Gaber
- Department of Dermatology, Venereology and Andrology, Assiut University, Assiut, Egypt
| | - Yasmin M Tawfik
- Department of Dermatology, Venereology and Andrology, Assiut University, Assiut, Egypt
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Gentile RD. Ultrasound-Assisted Rhytidectomy Including Sub-SMAS and Subplatysmal Dissection. Facial Plast Surg 2020; 36:430-446. [PMID: 32866980 DOI: 10.1055/s-0040-1714119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Energy-based facelifting techniques are a relatively new genre of surgery. In this approach, the energy-based device-whether laser, radiofrequency plasma, or ultrasound-can be used in the superficial plane to elevate skin flaps before performing more traditional facelift techniques involving the superficial musculoaponeurotic system (SMAS) or platysma. The initial reports of utilizing fiber lasers as surgical tools date back to approximately 2007 and initial lipolasers were used to elevate facial skin flaps. The other energy-based devices were also tested. The author has probably the largest series of energy-based facial rejuvenation procedures, having performed over 3,000 of these procedures. The advantages of laser-assisted rhytidectomy include hemostasis, facilitated dissection in areas hard to elevate conventionally such as nasolabial folds or distal neck and the remodeling and tightening of tissue that results from the activation of the wound healing cascade of neocollagenesis and wound contraction. The author currently has a preference for energy device used during rhytidectomy and it is a high frequency ultrasound energy delivered by a five-ring 2.9- and 3.7-mm probe. The use of the ultrasound dissector in both superficial and deep procedures is highlighted in this article with emphasis on its use for deep cervicoplasty and subplatysmal procedures as well as sub-SMAS elevations of the facial deep plane.
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Affiliation(s)
- Richard D Gentile
- Department of Facial Plastic Surgery, Gentile Facial Plastic and Aesthetic Laser Center, Youngstown, Ohio
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The efficacy of fractional carbon dioxide laser combined with narrow-band ultraviolet B phototherapy for non-segmental vitiligo: a systematic review and meta-analysis. Lasers Med Sci 2020; 36:165-173. [PMID: 32572662 DOI: 10.1007/s10103-020-03069-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 06/11/2020] [Indexed: 10/24/2022]
Abstract
Fractional carbon dioxide (CO2) laser has been used with conventional treatments for vitiligo, demonstrating more effectiveness compared with conventional treatments alone. Especially, fractional CO2 laser combined with narrow-band ultraviolet B (NB-UVB) was shown to induce more improvement compared with NB-UVB monotherapy for treating stable non-segmental vitiligo. However, the effectiveness of fractional CO2 laser plus NB-UVB for the treatment of non-segmental vitiligo remains controversial. Therefore, this study aimed to confirm the safety and efficacy of fractional CO2 laser combined with NB-UVB compared with NB-UVB monotherapy in stable non-segmental vitiligo. We searched the data from different databases, including Cochrane, Embase, and PubMed up to January 2020. Four randomized controlled trials (RCTs) for comparison between fractional CO2 laser plus NB-UVB and NB-UVB monotherapy in patients with stable non-segmental vitiligo were included. We performed meta-analyses for repigmentation improvement and patient satisfaction as well as subgroup analyses based on acral or non-acral vitiligo, according to the PRISMA guidelines. The combination treatment showed more superior results than NB-UVB monotherapy (≥ 75% repigmentation, RR 4.60, 95% CI 1.19-17.74; ≥ 50% repigmentation, RR 2.24, 95% CI 0.45-11.17; < 25% repigmentation, RR 0.81, 95% CI 0.60-1.08). Also, fractional CO2 laser plus NB-UVB significantly improved acral and non-acral vitiligo compared with NB-UVB monotherapy (standard mean difference (SMD) 1.24, 95% CI 0.66-1.82; SMD 1.14, 95% CI 0.67-1.60, respectively), while it increased markedly patient satisfaction compared with NB-UVB monotherapy (SMD 1.12, 95% CI 0.66-1.58). Collectively, this meta-analysis suggested that fractional CO2 laser combined with NB-UVB might be more effective for treating non-segmental vitiligo than NB-UVB monotherapy.
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15
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Gentile RD. Laser-Assisted Facelifting and Energy-Based Rejuvenation Techniques During Rhytidectomy. Facial Plast Surg Clin North Am 2020; 28:379-396. [PMID: 32503720 DOI: 10.1016/j.fsc.2020.03.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The use of energy-based devices as surgical tools during rhytidectomy was introduced in early 2007 to 2008 and occurred when the first fiber laser was approved for laser lipolysis. It became evident that the fiber laser-assisted rhytidectomy could offer several advantages compared with conventional rhytidectomy. The use of energy devices now includes temperature-controlled radiofrequency and helium plasma devices. Energy devices continue to offer advantages compared with knife and scissor approaches: improved hemostasis; an ability to dissect into areas without full flap elevation; and the shrink-wrap late effects of collagen remodeling after energy-based treatment, which improves the results of rhytidectomy.
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Affiliation(s)
- Richard D Gentile
- Gentile Facial Plastic & Aesthetic Laser Center, Facial Plastic Surgery, The Cleveland Clinic Akron General Hospital, Akron, OH, USA.
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Babossalam S, Abdollahimajd F, Aghighi M, Mahdikia H, Dilmaghanian A, Toossi P, Shokri B. The effect of nitrogen plasma on the skin and hair follicles: a possible promising future for the treatment of alopecia. Arch Dermatol Res 2019; 312:361-371. [PMID: 31811380 DOI: 10.1007/s00403-019-02020-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 11/20/2019] [Indexed: 11/30/2022]
Abstract
Nowadays, there is a great attention to the plasma applications in medicine. Not only does cold atmospheric pressure plasma provide a therapeutic opportunity to control redox-based processes, it is also an innovative method in rejuvenation. Given the current interest in new methods of rejuvenation, we aimed to introduce a novel pulsed nitrogen plasma torch with potential use in rejuvenation. We investigated production of reactive species at different pulse energy by spectroscopy and also measured nitric oxide and O2 concentration and evaluated the flame temperature. Fifteen Wistar rats were divided into three groups based on the applied energy settings; the skin of the animals was processed with plasma. For quantitative evaluation of dermis, epidermis and hair follicles (to confirm the effects of this technique on rejuvenation), skin biopsies were taken from both unexposed and treated areas. The spectroscopy results showed the presence of nitric oxide in plasma and the concentration was suitable for dermatological applications. A significant increase was observed in epidermal thickness, fibroblast cell proliferation and collagenesis (P < 0.05). Interestingly, plasma led to a temporary increase in the diameter of primary and secondary hair follicles compared to the controls. The results confirmed the positive effects of this pulsed nitrogen plasma torch on rejuvenation and also revealed a new possible aspect of cold plasma; its effect on hair follicles as a promising area in the treatment of alopecia that requires further clinical and molecular studies.
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Affiliation(s)
- Shima Babossalam
- Laser, Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box 19839-6941, Tehran, Iran
| | | | - Mustafa Aghighi
- Laser, Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box 19839-6941, Tehran, Iran
| | - Hamed Mahdikia
- Laser, Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box 19839-6941, Tehran, Iran
| | | | - Parviz Toossi
- Skin Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Babak Shokri
- Laser, Plasma Research Institute, Shahid Beheshti University, G.C., P.O. Box 19839-6941, Tehran, Iran. .,Physics Department, Shahid Beheshti University, G.C., P.O. Box 19839-6941, Tehran, Iran.
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King YA, Tsai TY, Tsai HH, Huang YC. Wirksamkeit einer ablationsbasierten Kombinationstherapie bei Vitiligo: Eine systematische Übersichtsarbeit und Metaanalyse. J Dtsch Dermatol Ges 2019; 16:1197-1210. [PMID: 30300497 DOI: 10.1111/ddg.13657_g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/19/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Yih-An King
- Department of Dermatology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Tsung-Yu Tsai
- Department of Dermatology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - Hsiou-Hsin Tsai
- Department of Dermatology, Taipei Medical University Hospital, Taipei, Taiwan
| | - Yu-Chen Huang
- Department of Dermatology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Department of Dermatology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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18
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Liu D, Adams MS, Burdette EC, Diederich CJ. Transurethral high-intensity ultrasound for treatment of stress urinary incontinence (SUI): simulation studies with patient-specific models. Int J Hyperthermia 2018; 34:1236-1247. [PMID: 29566562 PMCID: PMC6136964 DOI: 10.1080/02656736.2018.1456679] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 02/16/2018] [Accepted: 03/17/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Stress urinary incontinence (SUI) is prevalent in adult women, attributed to weakened endopelvic supporting tissues, and typically treated using drugs and invasive surgical procedures. The objective of this in silico study is to explore transurethral high-intensity ultrasound for delivery of precise thermal therapy to the endopelvic tissues adjacent to the mid-urethra, to induce thermal remodeling as a potential minimally invasive treatment alternative. METHODS 3D acoustic (Rayleigh-Sommerfeld) and biothermal (Pennes bioheat) models of the ultrasound applicator and surrounding tissues were devised. Parametric studies over transducer configuration [frequency, radius-of-curvature (ROC)] and treatment settings (power, duration) were performed, and select cases on patient-specific models were used for further evaluation. Transient temperature and thermal dose distributions were calculated, and temperature and dose metrics reported. RESULTS Configurations using a 5-MHz curvilinear transducer (3.5 × 10 mm, 28 mm ROC) with single 90 s sonication can create heated zones with 11 mm penetration (>50 °C) while sparing the inner 1.8 mm (<45 °C) radial depth of the urethral mucosa. Sequential and discrete applicator rotations can sweep out bilateral coagulation volumes (1.4 W power, 15° rotations, 600 s total time), produce large volumetric (1124 mm³ above 60 EM43 °C) and wide angular (∼50.5° per lateral sweep) coverage, with up to 15.6 mm thermal penetration and at least 1.6 mm radial urethral protection (<5 EM43 °C). CONCLUSION Transurethral applicators with curvilinear ultrasound transducers can deliver spatially selective temperature elevations to lateral mid-urethral targets as a possible means to tighten the endopelvic fascia and adjacent tissues.
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Affiliation(s)
- Dong Liu
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA
| | - Matthew S. Adams
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA
| | | | - Chris J. Diederich
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA, USA
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Kadry M, Tawfik A, Abdallah N, Badawi A, Shokeir H. Platelet-rich plasma versus combined fractional carbon dioxide laser with platelet-rich plasma in the treatment of vitiligo: a comparative study. Clin Cosmet Investig Dermatol 2018; 11:551-559. [PMID: 30510437 PMCID: PMC6231433 DOI: 10.2147/ccid.s178817] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Purpose The aim of this study was to assess the efficacy of platelet-rich plasma (PRP) vs combined fractional CO2 (Fr: CO2) laser with PRP in the treatment of stable nonsegmental vitiligo (NSV) lesions. Patients and methods This prospective, randomized, intrapatient, comparative controlled study was conducted between June 2014 and June 2016 at National Institute of Laser Enhanced Sciences (NILES), Cairo University, Cairo, Egypt. Thirty NSV patients were treated with PRP, Fr: CO2 laser, and combined Fr: CO2 laser with PRP. Intrapatient lesions were divide randomly into four groups. Each group was treated by one modality. The fourth group served as a control.Patients received six treatment sessions with 2-week interval for 3 months and were followed up after 3 months. Results A highly significant reduction was demonstrated through vitiligo analysis by computer-assisted grid (VACAG) in the combined Fr: CO2 laser with PRP and in the PRP only groups than other groups. These results were confirmed by mean improvement score by physician (MISP) and by VAS with no statistical difference between them. The combined Fr: CO2 laser with PRP group showed minimal side effects. Regardless of the modalities, better improvement was seen in the trunk than the face, extremities, and acral lesions with significant reduction in all regions. Face showed maximum response with combined Fr: CO2 laser with PRP. Trunk showed higher response with PRP. Upper limbs showed highest response with combined Fr: CO2 laser with PRP. Lower limbs showed the highest improvement with Fr: CO2 laser. Conclusion According to our study, combined Fr: CO2 laser with PRP achieved superior repigmentation than intradermal (ID) PRP. However, Fr: CO2 alone showed poor improvement. Combined ablative Fr: CO2 laser and PRP therapy followed by sun exposure could be used effectively and safely to treat refractory NSV.
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Affiliation(s)
- Mostafa Kadry
- Faculty of Medicine, Dermatology Department, Helwan University Cairo, Helwan, Egypt
| | - Abeer Tawfik
- Dermatology Unit, Department of Medical Applications of Lasers (MAL), National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt,
| | - Noha Abdallah
- Dermatology Unit, Department of Medical Applications of Lasers (MAL), National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt,
| | - Ashraf Badawi
- Dermatology Unit, Department of Medical Applications of Lasers (MAL), National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt, .,Department of Allergology and Dermatology, Szeged University, Hungary,
| | - Hisham Shokeir
- Dermatology Unit, Department of Medical Applications of Lasers (MAL), National Institute of Laser Enhanced Sciences, Cairo University, Giza, Egypt,
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21
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King YA, Tsai TY, Tsai HH, Huang YC. The efficacy of ablation-based combination therapy for vitiligo: A systematic review and meta-analysis. J Dtsch Dermatol Ges 2018; 16:1197-1208. [DOI: 10.1111/ddg.13657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/19/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Yih-An King
- Department of Dermatology; Taipei Medical University Hospital; Taipei Taiwan
| | - Tsung-Yu Tsai
- Department of Dermatology; Wan Fang Hospital, Taipei Medical University; Taipei Taiwan
| | - Hsiou-Hsin Tsai
- Department of Dermatology; Taipei Medical University Hospital; Taipei Taiwan
| | - Yu-Chen Huang
- Department of Dermatology; Wan Fang Hospital, Taipei Medical University; Taipei Taiwan
- Department of Dermatology, School of Medicine, College of Medicine; Taipei Medical University; Taipei Taiwan
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22
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Chiu YJ, Perng CK, Ma H. Fractional CO 2 laser contributes to the treatment of non-segmental vitiligo as an adjunct therapy: a systemic review and meta-analysis. Lasers Med Sci 2018; 33:1549-1556. [PMID: 29696444 DOI: 10.1007/s10103-018-2516-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 04/17/2018] [Indexed: 10/17/2022]
Abstract
The treatment of stable non-segmental vitiligo is often challenging, which new therapies are being searched. Multiple clinical trials have proposed the benefits and safety of using fractional carbon dioxide (CO2) laser as an adjunct therapy to conventional treatments. This study aimed to evaluate the safety and efficacy of fractional carbon dioxide laser as a combination therapy to conventional treatments in patients with stable non-segmental vitiligo. A literature search using PubMed, EMBASE, and the Cochrane Library was performed for comparative studies among vitiligo patients treated with additional fractional CO2 laser. Clinical outcomes in the selected studies were compared, and a meta-analysis was performed via Review Manager version 5.3, according to the PRISMA guidelines. Six studies with a total of 184 patches/patients were included in the present meta-analysis. The combination therapy group had significantly superior results than that of the control group (≥ 75% re-pigmentation, risk ratio [RR] 2.80, 95% confidence interval [CI] 1.29-6.07; ≥ 50% re-pigmentation, RR 2.26, 95% CI 1.23-5.9; < 25% re-pigmentation, RR 0.57, 95% CI 0.43-0.75). Limitations of the study included the small number of studies and sample size, inadequate blinding of participants, and variation between therapy protocols. Meta-analysis revealed that using fractional CO2 laser in combination with conventional treatments is efficient and safe, and may be considered as an adjunct therapeutic option for patients with refractive non-segmental vitiligo.
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Affiliation(s)
- Yu-Jen Chiu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital, 19/F, No. 201, Sec. 2, Shipai Rd., Beitou Dist, Taipei, 11217, Taiwan
- Department of Surgery, School of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Cherng-Kang Perng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital, 19/F, No. 201, Sec. 2, Shipai Rd., Beitou Dist, Taipei, 11217, Taiwan
- Department of Surgery, School of Medicine, National Yang Ming University, Taipei, Taiwan
| | - Hsu Ma
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital, 19/F, No. 201, Sec. 2, Shipai Rd., Beitou Dist, Taipei, 11217, Taiwan.
- Department of Surgery, School of Medicine, National Yang Ming University, Taipei, Taiwan.
- Department of Surgery, National Defense Medical Center, Taipei, Taiwan.
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Prasad A, Sawicka KM, Pablo KB, Macri LK, Felsenstein J, Wynne JJ, Clark RA. ArF excimer laser debrides burns without destruction of viable tissue: A pilot study. Burns 2018; 44:589-595. [DOI: 10.1016/j.burns.2017.09.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/13/2017] [Accepted: 09/15/2017] [Indexed: 12/22/2022]
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Doghaim NN, Gheida SF, El‐Tatawy RA, Mohammed Ali DA. Combination of fractional carbon dioxide laser with narrow band ultraviolet B to induce repigmentation in stable vitiligo: A comparative study. J Cosmet Dermatol 2018; 18:142-149. [DOI: 10.1111/jocd.12553] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Noha Nabil Doghaim
- Faculty of Medicine Department of Dermatology and Venereology Tanta University Tanta Egypt
| | - Shereen Farouk Gheida
- Faculty of Medicine Department of Dermatology and Venereology Tanta University Tanta Egypt
| | - Rania Ahmed El‐Tatawy
- Faculty of Medicine Department of Dermatology and Venereology Tanta University Tanta Egypt
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Chen W, Zhou Y, Huang FR, Luo D, Wang DG. Preliminary study on the treatment of vitiligo with carbon dioxide fractional laser together with tacrolimus. Lasers Surg Med 2018; 50:829-836. [PMID: 29635693 DOI: 10.1002/lsm.22821] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Wei Chen
- Department of Dermatology; The First Affiliated Hospital with Nanjing Medical University; Guangzhou Road 300, Nanjing City Jiangsu Province, China 210029
| | - Yuan Zhou
- Department of Dermatology; The First Affiliated Hospital with Nanjing Medical University; Guangzhou Road 300, Nanjing City Jiangsu Province, China 210029
| | - Fei-ran Huang
- Department of Dermatology; The First Affiliated Hospital with Nanjing Medical University; Guangzhou Road 300, Nanjing City Jiangsu Province, China 210029
| | - Dan Luo
- Department of Dermatology; The First Affiliated Hospital with Nanjing Medical University; Guangzhou Road 300, Nanjing City Jiangsu Province, China 210029
| | - Da-guang Wang
- Department of Dermatology; The First Affiliated Hospital with Nanjing Medical University; Guangzhou Road 300, Nanjing City Jiangsu Province, China 210029
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Motta MM, Stelini RF, Calderoni DR, Gilioli R, Kharmandayan P. Lower energy and pulse stacking. A safer alternative for skin tightening using fractional CO2 laser. Acta Cir Bras 2016; 31:28-35. [PMID: 26840353 DOI: 10.1590/s0102-865020160010000005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 12/23/2015] [Indexed: 01/09/2023] Open
Abstract
PURPOSE To evaluate the effect of different energies and stacking in skin shrinkage. METHODS Three decreasing settings of a fractional CO2 laser were applied to the abdomen of Twenty five Wistar rats divided into three groups. Group I (n=5) was histologically evaluated for microthermal zones dimensions. Groups II and III (n=10 each) were macroscopic evaluated with freeware ImageJ for area contraction immediately and after 30 and 60 days. RESULTS No statistical significance was found within microthermal zone histological dimensions (Group I) in all settings studied. (Ablation depth: 76.90 to 97.18µm; Coagulation depth: 186.01 to 219.84 µm). In Group II, macroscopic evaluation showed that all settings cause significant immediate skin contraction. The highest setting cause significant more intense tightening effect initially, contracting skin area from 258.65 to 179.09 mm2. The same pattern was observed in Group III. At 30 and 60 days, the lowest setting significantly sustained contraction. CONCLUSION Lower fractional CO2 laser energies associated to pulse stacking could cause consistent and long lasting tissue contraction in rats.
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Nelson AA, Beynet D, Lask GP. A novel non-invasive radiofrequency dermal heating device for skin tightening of the face and neck. J COSMET LASER THER 2015; 17:307-12. [DOI: 10.3109/14764172.2015.1039035] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hélou J, Maatouk I, Obeid G, Moutran R, Stéphan F, Tomb R. Fractional laser for vitiligo treated by 10,600 nm ablative fractional carbon dioxide laser followed by sun exposure. Lasers Surg Med 2014; 46:443-8. [PMID: 24889492 DOI: 10.1002/lsm.22260] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND Vitiligo is an acquired disorder of the skin and mucous membranes. Many patients with vitiligo remain in the refractory state despite the availability of numerous potential treatments. To the best of our knowledge, only one trial considers ablative fractional CO2 laser in the treatment of vitiligo. OBJECTIVE To investigate the effects of fractional CO2 laser followed by systemic sun exposure on non-segmental vitiligo (NSV). METHODS Ten patients presenting refractory NSV were enrolled in this study. The patients underwent three sessions, one month apart, of fractional CO2 laser therapy on the affected areas of the skin (L-group). Five days after each laser treatment, patients were asked to expose themselves to the sun for 2 hours on a daily basis. Objective and subjective clinical assessments were performed at the beginning and at the end of the treatment. The L-group was then compared to a control group (C-group) that consisted of vitiligo lesions in the same patients but with sun exposure as the exclusive therapy. RESULTS Compared to the C-group, the L-group showed better improvement in both objective and subjective assessments. There were no noticeable adverse events in terms of scarring and Koebner phenomenon among others. CONCLUSIONS All patients treated with both, laser sessions and sun exposure, improved their chronic NSV lesions. Improvement was less significant in patients who exhibited vitiligo lesions over articular surfaces such as elbows and underarms. The best results were observed in vitiligo plaques located on the face, neck and legs. Consequently, fractional CO2 laser followed by sun exposure could be considered as an alternative modality for the treatment of refractory vitiligo, especially in sunny regions.
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Affiliation(s)
- J Hélou
- Department of Dermatology, Hôtel-Dieu de France, Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
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Tretti Clementoni M, Galimberti M, Tourlaki A, Catenacci M, Lavagno R, Bencini PL. Random fractional ultrapulsed CO2 resurfacing of photodamaged facial skin: long-term evaluation. Lasers Med Sci 2012; 28:643-50. [PMID: 22622960 DOI: 10.1007/s10103-012-1116-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 05/01/2012] [Indexed: 10/28/2022]
Abstract
Although numerous papers have recently been published on ablative fractional resurfacing, there is a lack of information in literature on very long-term results. The aim of this retrospective study is to evaluate the efficacy, adverse side effects, and long-term results of a random fractional ultrapulsed CO2 laser on a large population with photodamaged facial skin. Three hundred twelve patients with facial photodamaged skin were enrolled and underwent a single full-face treatment. Six aspects of photodamaged skin were recorded using a 5 point scale at 3, 6, and 24 months after the treatment. The results were compared with a non-parametric statistical test, the Wilcoxon's exact test. Three hundred one patients completed the study. All analyzed features showed a significant statistical improvement 3 months after the procedure. Three months later all features, except for pigmentations, once again showed a significant statistical improvement. Results after 24 months were similar to those assessed 18 months before. No long-term or other serious complications were observed. From the significant number of patients analyzed, long-term results demonstrate not only how fractional ultrapulsed CO2 resurfacing can achieve good results on photodamaged facial skin but also how these results can be considered stable 2 years after the procedure.
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31
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Johnson JE, O'Shaughnessy KF, Kim S. Microwave thermolysis of sweat glands. Lasers Surg Med 2011; 44:20-5. [DOI: 10.1002/lsm.21142] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2011] [Indexed: 11/12/2022]
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Brightman L, Weiss E, Chapas AM, Karen J, Hale E, Bernstein L, Geronemus RG. Improvement in arm and post-partum abdominal and flank subcutaneous fat deposits and skin laxity using a bipolar radiofrequency, infrared, vacuum and mechanical massage device. Lasers Surg Med 2010; 41:791-8. [PMID: 20014259 DOI: 10.1002/lsm.20872] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND AND OBJECTIVES Skin laxity of the body is a growing cosmetic concern. Laxity can result from chronological or photoaging and changes in body dimensions during pregnancy or weight loss. The end result is loose, sagging skin, and localized fat deposits. Liposuction and abdominoplasty or brachioplasty are established approaches to these issues. Patient desire for alternatives to surgical correction has spawned the development of non-invasive body contouring devices. The combination of infrared light (IR), bipolar radiofrequency (RF), vacuum and mechanical massage (Velashape, Syneron Medical Ltd, Israel) has demonstrated efficacy in improving skin appearance and circumference of the thighs [Goldberg et al., Derm Surg 2008; 34:204-209; Fisher et al., Derm Surg 2005; 31:1237-1241; Arnoczky and Aksan, J Am Acad Orthop Surg 2000; 8:305-313; Alster and Tanzi, J Cosmetic Laser Therapy 2005; 7:81-85; Wanitphakdeedecha and Manuskiatti, J Cosmet Dermatol 2006; 5:284-288; Nootheti et al., Lasers Surg Med 2006; 38: 908-912], but only anecdotal evidence has supported its use on other anatomic locations. This study was designed to evaluate the efficacy and safety of Velashape on additional body sites and more rigorously examine the technology's impact on upper arm as well as abdominal and flank circumference. STUDY DESIGN AND METHODS Subjects were 28-70 years old, skin types I-V. Nineteen subjects underwent 5 weekly treatments of the upper arms, and 10 subjects underwent 4 weekly treatments of the abdomen and flanks. Treatments were performed using Velashape. Circumference measurements, photographs, and subject weights were performed prior to treatment and at 1- and 3-month follow-ups. Subjects were asked to record their treatment satisfaction level. RESULTS Change in arm circumference, at the 5th treatment was statistically significant with a mean loss of 0.625 cm. At 1- and 3-month follow-ups, mean loss was 0.71 and 0.597 cm respectively. Reduction of abdominal circumference at 3rd treatment was statistically significant with a 1.25 cm mean loss. At 1- and 3-month follow-ups, average loss was 1.43 and 1.82 cm respectively. CONCLUSIONS This study demonstrates with statistical significance, sustainable reduction in circumference and improvement in appearance of arms and abdomen following treatment with Velashape.
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Affiliation(s)
- Lori Brightman
- Laser & Skin Surgery Center of New York, New York, New York 10016, USA.
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Alam M, White LE, Martin N, Witherspoon J, Yoo S, West DP. Ultrasound tightening of facial and neck skin: a rater-blinded prospective cohort study. J Am Acad Dermatol 2010; 62:262-9. [PMID: 20115948 DOI: 10.1016/j.jaad.2009.06.039] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2008] [Revised: 05/29/2009] [Accepted: 06/08/2009] [Indexed: 11/26/2022]
Abstract
BACKGROUND Nonablative skin tightening technologies offer the prospect of reduction of wrinkles and skin sagging with minimal downtime, discomfort, and risk of adverse events. The excellent safety profile is mitigated by the limited efficacy of such procedures. OBJECTIVE We sought to assess the efficacy of ultrasound skin tightening for brow-lift in the context of a procedure treating the full face and neck. METHODS This was a rater-blinded, prospective cohort study at a dermatology clinic in an urban academic medical center. Subjects were medicated with topical anesthetic and then treated with an investigational focused intense ultrasound tightening device to the forehead, temples, cheeks, submental region, and side of neck using the following probes: 4 MHz, 4.5-mm focal depth; 7 MHz, 4.5-mm focal depth; and 7 MHz, 3.0-mm focal depth. Standardized photographs of front and side views were obtained at 2, 7, 28, 60, and 90 days; rating scales of pain, adverse events, physical findings, and patient satisfaction were also completed. Primary outcome measure was detection of improvement in paired comparison of pretreatment and posttreatment (day 90) photographs by 3 masked expert physician assessors, cosmetic and laser dermatologists, and plastic surgeons who were not authors. Second primary outcome measure was objective brow elevation as quantitated by a standard procedure using fixed landmarks. Secondary outcomes measure was patient satisfaction as measured by a questionnaire. RESULTS A total of 36 subjects (34 female) were enrolled, one subject dropped out, and 35 subjects were evaluated. Median age was 44 years (range 32-62). On the first primary outcome measure, 30 of 35 subjects (86%) were judged by the 3 masked experienced clinician raters to show clinically significant brow-lift 90 days after treatment (P = .00001). On the second primary outcome measure, mean value of average change in eyebrow height as assessed by measurement of photographs at 90 days was 1.7 mm. LIMITATIONS Limitations of this study include the inability to quantitatively measure lower face tightening because of the lack of fixed anatomic landmarks in this area. CONCLUSION Ultrasound appears to be a safe and effective modality for facial skin tightening. A single ultrasound treatment of the forehead produced on average brow height elevation of slightly less than 2 mm. Most treated individuals responded, commonly with accompanying transitory mild erythema and edema.
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Affiliation(s)
- Murad Alam
- Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA.
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Chiba C, Usui A, Hara H, Ishi Y. Clinical experience in skin rejuvenation treatment in Asians using a long‐pulse Nd:YAG laser. J COSMET LASER THER 2009; 11:134-8. [DOI: 10.1080/14764170903137634] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Iyer S, Carranza D, Kolodney M, Macgregor D, Chipps L, Soriano T. Evaluation of procollagen I deposition after intense pulsed light treatments at varying parameters in a porcine model. J COSMET LASER THER 2009; 9:75-8. [PMID: 17558756 DOI: 10.1080/14764170701299313] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Several lasers and light sources have been reported to induce dermal collagen remodeling without damaging the epidermis. The intense pulsed light (IPL) system, which emits polychromatic light of wavelengths between 560 and 1200 nm belongs to this group of increasingly popular non-ablative skin rejuvenation devices. Various IPL treatment parameters can be adjusted to achieve optimal dermal remodeling and clinical improvement. The aim of this study was to evaluate variations in IPL treatment parameters and the effect on procollagen I deposition. Marked areas of a live Yorkshire pig's flank skin were irradiated with a single or double pass of an IPL source using a fluence of 30 or 40 J/cm2 and a cut-off wavelength filter of 590 nm. Skin biopsies were performed on postoperative days 1, 7, 14, 21, and 42. A statistically significant increase in procollagen I in treated versus untreated sites was found on postoperative days 21 and 42, but not earlier. There was a uniformly significant increase in procollagen I on day 42 using the 590 nm filter at both 30 and 40 J/cm2 with either a single or double pass. The increase in procollagen was greater with a fluence of 40 J/cm2 compared with 30 J/cm2.
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Affiliation(s)
- Shilesh Iyer
- Division of Dermatology, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
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Berlin AL, Hussain M, Phelps R, Goldberg DJ. A Prospective Study of Fractional Scanned Nonsequential Carbon Dioxide Laser Resurfacing. Dermatol Surg 2009; 35:222-8. [DOI: 10.1111/j.1524-4725.2008.34413.x] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Goerge T, Peukert N, Bayer H, Rütter A. Ablative fractional photothermolysis – A novel step in skin resurfacing. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.mla.2008.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Clementoni MT, Gilardino P, Muti GF, Beretta D, Schianchi R. Non-sequential fractional ultrapulsed CO2 resurfacing of photoaged facial skin: preliminary clinical report. J COSMET LASER THER 2008; 9:218-25. [PMID: 17963138 DOI: 10.1080/14764170701632901] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
This study evaluates results, adverse side effects and downtime of the protocol 'ActiveFX' for photodamaged facial skin. A non-sequential fractional ultrapulsed CO2 laser with specific settings is used in addition to a new computer pattern generator (CPG). From September 2006 to March 2007, 55 patients underwent this new 'soft' single-session, single-pass and full-face ablative fractional treatment. The patients were evaluated at baseline and 1 and 3 months after the treatment using a five-point scale. Seven aspects of photodamaged skin were recorded: global score, fine lines, mottled pigmentation, sallow complexion, tactile roughness, coarse wrinkles and telangiectasias. The results were compared with a non-parametric statistical test, the Wilcoxon's exact test. Eight patients received a double-pass treatment on the crow's feet regions and the improvement of the coarse wrinkles was analyzed with a quartile grading scale. Significant differences (p<0.05) between baseline and 1 and 3 months post-treatment were observed for all features except telangiectasias. Coarse wrinkles presented a good improvement only in the regions submitted to a double-pass. Minimal and isolated adverse side effects were noted and the downtime was very low. Non-sequential fractional ultrapulsed CO2 light treatment ('ActiveFX') can be considered an excellent alternative for photodamaged facial skin.
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White WM, Makin IRS, Slayton MH, Barthe PG, Gliklich R. Selective transcutaneous delivery of energy to porcine soft tissues using intense ultrasound (IUS). Lasers Surg Med 2008; 40:67-75. [DOI: 10.1002/lsm.20613] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hantash BM, Bedi VP, Chan KF, Zachary CB. Ex vivo histological characterization of a novel ablative fractional resurfacing device. Lasers Surg Med 2007; 39:87-95. [PMID: 17115384 DOI: 10.1002/lsm.20405] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVES We introduce a novel CO(2) laser device that utilizes ablative fractional resurfacing for deep dermal tissue removal and characterize the resultant thermal effects in skin. STUDY DESIGN/MATERIALS AND METHODS A prototype 30 W, 10.6 microm CO(2) laser was focused to a 1/e(2) spot size of 120 microm and pulse duration up to 0.7 milliseconds to achieve a microarray pattern in ex vivo human skin. Lesion depth and width were assessed histologically using either hematoxylin & eosin (H&E) or lactate dehydrogenase (LDH) stain. Pulse energies were varied to determine their effect on lesion dimensions. RESULTS Microarrays of ablative and thermal injury were created in fresh ex vivo human skin irradiated with the prototype CO(2) laser device. Zones of tissue ablation were surrounded by areas of tissue coagulation spanning the epidermis and part of the dermis. A thin condensed lining on the interior wall of the lesion cavity was observed consistent with eschar formation. At 23.3 mJ, the lesion width was approximately 350 microm and depth 1 mm. In this configuration, the cavities were spaced approximately 500 microm apart and interlesional epidermis and dermis demonstrated viable tissue by LDH staining. CONCLUSION A novel prototype ablative CO(2) laser device operating in a fractional mode was developed and its resultant thermal effects in human abdominal tissue were characterized. We discovered that controlled microarray patterns could be deposited in skin with variable depths of dermal tissue ablation depending on the treatment pulse energy. This is the first report to characterize the successful use of ablative fractional resurfacing as a potential approach to dermatological treatment.
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Affiliation(s)
- Basil M Hantash
- Stanford University School of Medicine, Stanford, California 94305, USA
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Abstract
The ubiquity of increased sun exposure, oral contraceptives, and phototoxic drugs has led to an increased prevalence of conditions such as dyschromia, melasma, rhytides, and other signs of photoaging over the past few decades. Through the application of selective photothermolysis, laser surgery has attempted to create therapeutic options for these medically recalcitrant conditions. To date, however, this technology has been met with limited success, due to a high incidence of posttreatment side effects, inability to treat off the face, and a safety profile tailored to Fitzpatrick skin types I to III. More recently, a novel approach coined "fractional photothermolysis" was developed in an attempt to overcome these limitations. This new laser treatment modality has allowed for effective treatment of a diverse array of dermatologic conditions on and off the face with a wider therapeutic index and improved safety profile independent of Fitzpatrick skin type. This review sheds light on the technical aspects, biologic mechanisms, and clinical effects of fractional photothermolysis that help set it apart from previous modes of laser surgery.
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Affiliation(s)
- Basil M Hantash
- Division of Plastic Surgery, and Department of Dermatology, Stanford University Medical Center, 257 Campus Drive, Stanford, CA 94305, USA.
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Hedelund L, Haedersdal M, Egekvist H, Heidenheim M, Hans CW, Poulsen T. CO2 laser-resurfacing: Increased risk of side effects after uv-exposure?an experimental animal study. Lasers Surg Med 2005; 36:79-84. [PMID: 15704160 DOI: 10.1002/lsm.20135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Carbon dioxide (CO(2)) laser resurfacing is primarily performed on photodamaged facial skin where patients are further exposed to ultraviolet radiation (UVR) postoperatively. We examined whether pre- and postoperative UVR influences the development of CO(2) laser-induced side effects. STUDY DESIGN/MATERIALS AND METHODS Hairless mice (n = 211) were treated with a Sharplan CO(2) laser with FeatherTouch scanner. Simulated solar irradiation was administered either preoperatively or pre- and postoperatively. Skin end-points (wounds, texture changes, and pigmentary changes) were evaluated blinded by clinical evaluations, skin reflectance spectroscopy, and histological examinations. RESULTS Pre- and postoperative UVR exposed mice obtained higher clinical scores of wounds (P < 0.02) and texture changes (P < 0.01) and developed more heavy fibrosis than mice treated with laser but no UVR. UVR exposure after CO(2) laser treatment induced significant hyperpigmentation compared to unexposed control mice (P < 0.003), whereas CO(2) laser treatment itself did not induce pigmentary changes. CONCLUSIONS UVR increases in an animal model the occurrence of postoperative side effects from CO(2) laser resurfacing.
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Affiliation(s)
- Lene Hedelund
- Department of Dermatology, Copenhagen University Hospital, Bispebjerg Hospital, DK-2400 Copenhagen, Denmark.
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Alster TS, Bellew SG. Improvement of Dermatochalasis and Periorbital Rhytides With a High-Energy Pulsed CO2 Laser: A Retrospective Study. Dermatol Surg 2004; 30:483-7; discussion 487. [PMID: 15056134 DOI: 10.1111/j.1524-4725.2004.30160.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Upper eyelid dermatochalasis is typically treated with excisional blepharoplasty. The role of the CO2 laser previously had been confined to that of a vaporizing, incisional, or hemostatic tool. Over the past several years, however, ablative CO2 laser skin resurfacing has been popularized as an adjunctive treatment to blepharoplasty to minimize periorbital rhytides through its vaporizing as well as skin-tightening action. OBJECTIVE To evaluate the safety and efficacy of a high-energy pulsed CO2 laser as a stand-alone treatment for dermatochalasis and periorbital rhytides. METHODS Sixty-seven patients (skin phototypes I-IV) with mild-to-severe upper eyelid dermatochalasis and periorbital rhytides received periocular CO2 laser skin treatment. Global assessment scores of dermatochalasis and rhytides were determined by a side-by-side comparison of periocular photographs preoperatively and 1, 3, and 6 months postoperatively. In addition, caliper measurements of upper eyelids before and 1, 3, and 6 months after treatment were obtained. RESULTS Both dermatochalasis and periorbital rhytides were significantly improved after periocular CO2 laser skin resurfacing. Patients with more severe dermatochalasis and rhytides showed greater improvement after CO2 laser treatment than did those with mild or moderate involvement. Side effects were limited to erythema and transient hyperpigmentation. No scarring, hypopigmentation, or ectropion were observed. CONCLUSIONS Periocular skin resurfacing with a CO2 laser can safely and effectively improve upper eyelid dermatochalasis and periorbital rhytides.
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Affiliation(s)
- Tina S Alster
- Washington Institute of Dermatologic Laser Surgery, 2311 M Street NW, Suite 200, Washington, DC 20037, USA.
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Abstract
Nonablative skin remodeling has become an attractive option for patients whose lifestyles demand a noninvasive approach to skin rejuvenation. This review addresses the rationales for therapy, specific devices, and study outcomes.
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Affiliation(s)
- Christina A Hardaway
- Department of Dermatology, Naval Medical Center San Diego, San Diego, California, USA
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Abstract
BACKGROUND AND OBJECTIVE Pulsed CO2 laser resurfacing improves photodamage and acne scarring by ablation of abnormal tissue with subsequent regeneration and remodeling of collagen and through heat induced collagen contraction. Whether collagen contraction persists long-term and helps maintain the skin tightening observed after resurfacing is debated. One possible mechanism of long-term clinical tightening is that of wound contracture that occurs as part of normal wound healing. If normal wound contracture, and not heat induced collagen contraction, is responsible for maintaining the initial skin tightening seen in CO2 laser resurfacing, then equal results would be expected from resurfacing with either CO2 or erbium lasers. The study was performed to determine whether there is a difference in skin tightening secondary to thermally mediated collagen contraction versus that which occurs secondary to tissue contraction of wound healing. The persistence of these changes over 6 months and the histologic characteristics were studied as well. STUDY DESIGN/MATERIALS AND METHODS Nine patients had four tattoo dots applied to the upper eyelids, with horizontal axis measuring 18-20 mm and the vertical axis 6-10 mm. One month later, one eyelid was treated with three passes of the UltraPulse CO2 laser and the other eyelid with an erbium laser to the end point of early pinpoint bleeding. Three patients were treated with additional passes after pinpoint bleeding was encountered. The total number of pulses used per patient was recorded. Measurements of the vertical and horizontal distances were made after each pass and monthly for 6 months. The treated skin was then excised in performance of an upper lid blepharoplasty and the tissue submitted for histologic analysis. RESULTS In the vertical plane, the UltraPulse CO2 laser induced an average of 43% tightening intraoperatively and this gradually diminished to an average of 34% by 6 months, whereas the wound contracture of erbium resurfacing was not seen until 1 month postoperatively, at which time 42% tightening was seen, gradually diminishing to 36% at 6 months. Three patients with erbium resurfacing had scarring present. These were the three patients treated most aggressively and also the three patients with the most significant wound contracture. Scarring was not seen on the CO2 treated side in any patients. In the horizontal plane, the CO2 laser caused 31% intraoperative tightening, decreasing to 19% at 6 months. In this plane, the erbium laser induced wound contracture was 12% at 1 month which remained stable and unchanged. CONCLUSIONS Although wound contraction secondary to tissue healing may result in nearly the same tissue tightening as heat-induced collagen contraction, the two processes are very different and variable, with increased risk of scarring seen with wound contracture, compared with heat-induced collagen tightening. The tissue tightening seen with thermally induced collagen contraction is long-lasting, if not "permanent."
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Affiliation(s)
- R E Fitzpatrick
- Department of Medicine, University of California at San Diego, USA.
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