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Terapia por Luz de Baja Intensidad/métodos , Células Fotorreceptoras Retinianas Conos , Distrofias Retinianas/terapia , Animales , Modelos Animales de Enfermedad , Humanos , Terapia por Luz de Baja Intensidad/instrumentación , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Ratones , Distrofias Retinianas/fisiopatologíaRESUMEN
BACKGROUND: Although carpal tunnel syndrome (CTS) is a common neuromuscular disorder, studies on its conservative treatment are inadequate and contradictory. OBJECTIVES: This study aimed to investigate and compare the effectiveness of low power laser therapy (LPLT) and Kinesio taping (KT) for the treatment of CTS. METHODS: Sixty patients with CTS were included in this study. One group received 15 sessions of KT, and the second group underwent 15 sessions of LPLT within three weeks. All patients were assessed with hand grip strength (HGS), Visual Analogue Scale (VAS)-pain, Douleur Neuropathique-4 (DN4) score, Boston Questionnaire (BQ), and electroneuromyography before and after treatment. RESULTS: Before treatment, all clinical and neurophysiological parameters were similar between the groups. After treatment, both groups significantly improved in terms of HGS, VAS-pain, DN4, and BQ. However, the LPLT group had significantly better HGS, VAS-pain, DN4, and BQ than the KT group. In addition, while median nerve motor distal latency and median nerve sensory conduction velocity improved significantly with treatment in both groups, the LPLT group's improvement was significantly better than that of the KT group. CONCLUSIONS: In patients with CTS, both LPLT and KT were effective treatments. However, the LPLT group had significantly better improvements than the KT group.
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Cinta Atlética , Síndrome del Túnel Carpiano/terapia , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Modalidades de Fisioterapia/estadística & datos numéricos , Adulto , Femenino , Fuerza de la Mano , Humanos , Rayos Láser , Masculino , Dimensión del Dolor , Modalidades de Fisioterapia/instrumentación , Estudios Prospectivos , Resultado del TratamientoRESUMEN
INTRODUCTION: Androgenetic alopecia is the most common form of hair loss in both sexes. In recent studies, low-level light therapy (LLLT) has been established as an effective treatment for alopecia. The purpose of this study was to evaluate the safety and efficacy of LLLT using a new helmet-type device for the treatment of androgenetic alopecia. METHOD: A randomized, sham device-controlled, double-blind clinical trial was conducted at 2 institutions. Sixty participants diagnosed with androgenetic alopecia aged from 19 to 65 years were recruited. LLLT was performed through a helmet-type device that emitted light with a mean output power of 2.36âmW/cm at a wavelength of 655ânm. Participants were divided into 2 groups, which respectively used the experimental device and a sham device. After tattooing at the central point of the vertex, phototrichograms at that point were obtained at 0, 8, and 16 weeks. The primary endpoint of the study was the difference in the rate of change of hair density between the test group and the control group. RESULTS: Comparing the results at baseline and week 16, the experimental group showed an increase in hair density of 41.90âhairs/cm and an increase in hair thickness of 7.50âµm, whereas the control group showed an increase of 0.72âhairs/cm and a decrease of 15.03âµm, respectively (Pâ<â.001). No adverse events or side effects occurred. CONCLUSION: LLLT showed a significant effect on increasing hair density in patients with androgenetic alopecia. LLLT could be a safe and effective treatment for androgenetic alopecia in both sexes.
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Alopecia/orina , Dispositivos de Protección de la Cabeza/normas , Terapia por Luz de Baja Intensidad/normas , Adulto , Anciano , Alopecia/fisiopatología , Método Doble Ciego , Diseño de Equipo/métodos , Femenino , Dispositivos de Protección de la Cabeza/estadística & datos numéricos , Humanos , Terapia por Luz de Baja Intensidad/métodos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Placebos/administración & dosificación , Resultado del TratamientoRESUMEN
In Mexico, tattooed migrants face discrimination and are at high-risk of incarceration, thus, we assessed whether receiving laser tattoo removal affected the likelihood of incarceration. In 2015-2016, 89 adults ages ≥ 18 years with visible tattoos were recruited at a free-clinic to receive laser tattoo removal or assigned to the wait-list; all completed baseline and 6-month questionnaires. Overall, 97.8% of participants ever migrated to the USA. In multivariate analyses restricted to migrants (n = 87), those receiving laser tattoo removal [Adjusted Odds Ratio (AOR) 0.27, 95% CI 0.07-0.89] and possessing a Mexican Voting card (AOR 0.14; 95% CI 0.03-0.58) were significantly less likely than wait-list participants to be incarcerated at 6-months. Previously incarcerated participants were significantly more likely to be incarcerated at follow-up. Tattoo removal may reduce incarceration among Mexican migrants. Future studies can assess other health and social benefits of tattoo removal for migrants/deportees returning to Mexico.
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Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Americanos Mexicanos/estadística & datos numéricos , Prisioneros/estadística & datos numéricos , Tatuaje/estadística & datos numéricos , Migrantes/estadística & datos numéricos , Adulto , Factores de Edad , Femenino , Humanos , Relaciones Interpersonales , Láseres de Estado Sólido , Masculino , México/etnología , Persona de Mediana Edad , Factores Sexuales , Factores Socioeconómicos , Factores de Tiempo , Estados Unidos/epidemiología , Listas de EsperaRESUMEN
BACKGROUND: Laser and energy-based devices may be used for many cutaneous indications, including facial resurfacing, improving skin conditions, and reducing signs of photoaging. Currently, no consensus papers or guidelines exist concerning peri-operative agents and specifically their use for laser skin resurfacing and their potential/possible role in prevention or treatment of side effects. AIM: To explore current practice using laser and energy devices, a survey was developed to identify the trends in pre- and postprocedural treatment measures. METHODS: The survey was sent out digitally to 300 randomly selected US dermatologist and plastic surgeon physicians practicing medical esthetics using laser and other energy devices treatment for facial rejuvenation. The survey gathered information on demographics, types of devices used in the clinic and pre-/postprocedural measures for facial laser, and other energy-based devices treatment. RESULTS: The survey was active from June 15, to July 15, 2018, and fifty-eight dermatologists and plastic surgeons completed the survey (19.3% response rate, 58/300). The results showed inconsistency in skin preparation strategies and postprocedure wound care. The majority of survey participants (55/58 [96%]) reported prophylactic oral antiviral use pre- and post-treatment; however, there was inconsistency about when to start and when to stop the use. A similar inconsistency existed in the recommended period of post-treatment sun protection before and after treatment. CONCLUSION: The results of the survey confirmed the lack of consistency in the types and duration of pre- and postprocedural measures-emphasizing the need for evidence-based recommendations to optimize outcomes, prevent infection, enhance comfort, and reduce downtime.
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Terapia por Luz de Baja Intensidad/efectos adversos , Regeneración de la Piel con Plasma/efectos adversos , Cuidados Posoperatorios/estadística & datos numéricos , Complicaciones Posoperatorias/terapia , Cuidados Preoperatorios/estadística & datos numéricos , Terapia por Radiofrecuencia/efectos adversos , Consenso , Dermatólogos/estadística & datos numéricos , Cara , Humanos , Terapia por Luz de Baja Intensidad/normas , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Regeneración de la Piel con Plasma/normas , Regeneración de la Piel con Plasma/estadística & datos numéricos , Cuidados Posoperatorios/métodos , Cuidados Posoperatorios/normas , Complicaciones Posoperatorias/etiología , Guías de Práctica Clínica como Asunto , Cuidados Preoperatorios/métodos , Cuidados Preoperatorios/normas , Terapia por Radiofrecuencia/normas , Terapia por Radiofrecuencia/estadística & datos numéricos , Rejuvenecimiento , Piel/inmunología , Piel/efectos de la radiación , Envejecimiento de la Piel/fisiología , Envejecimiento de la Piel/efectos de la radiación , Cirujanos/estadística & datos numéricos , Encuestas y Cuestionarios/estadística & datos numéricos , Resultado del Tratamiento , Cicatrización de HeridasRESUMEN
OBJECTIVE: The aim of this randomized controlled trial was to evaluate the safety and efficacy of neodymium: yttrium aluminum garnet laser treatment of lichen sclerosus (LS) by comparing it with topical corticosteroid treatment. METHODS: A total of 40 female patients with vulvar LS were randomized 1:1 into a study (laser) group and a control (topical corticosteroids) group. The laser group received three laser treatments. Blinded evaluators evaluated biopsies and graded improvement on clinical photographs at baseline and at 3 months. Patients graded the intensity of symptoms on a 0 to 10 visual analogue scale at baseline and 1-, 3-, and 6-month follow-up. Patients also rated the tolerability of laser treatments, and side effects were monitored. (Canadian Task Force classification I) RESULTS: Laser treatment discomfort was on average 1.5 of 10 on the visual analogue scale. At 1- and 3-month follow-up, patients in the laser group had significantly greater improvement in LS symptoms (burning, itching, pain, and dyspareunia), better patient satisfaction, and greater reduction of sclerosis than patients in the topical corticosteroid group. At 6-month follow-up, the improvement of symptoms in the laser group was still significant. The correct order of photographs (before and after treatment) was assigned significantly more often in the laser-treated patients compared with the control group. CONCLUSION: Laser therapy for LS caused minimal patient discomfort during the treatment, with no adverse effects, and demonstrated better efficacy than in the control group, with significant improvement lasting up to 6 months. Laser therapy is a promising option for patients not responding to topical corticosteroid therapy or patients wishing to reduce long-term corticosteroid maintenance use.
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Láseres de Estado Sólido/uso terapéutico , Liquen Escleroso y Atrófico/radioterapia , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Adulto , Anciano , Betametasona/uso terapéutico , Femenino , Glucocorticoides/uso terapéutico , Humanos , Liquen Escleroso y Atrófico/tratamiento farmacológico , Persona de Mediana EdadRESUMEN
At least one-fourth of US veterans who served in the 1990-1991 Gulf War (GW) are affected by the chronic symptomatic illness known as Gulf War illness (GWI). This condition typically includes some combination of fatigue, headaches, cognitive dysfunction, musculoskeletal pain, and respiratory, gastrointestinal and dermatologic complaints. To date, effective treatments for GWI have been elusive. Photobiomodulation (PBM) describes the non-pharmacological, non-thermal use of light to stimulate, heal, and protect tissue that has either been injured, is degenerating, or else is at risk of dying. Significant benefits have been reported following application of transcranial PBM to humans with acute stoke, traumatic brain injury (TBI), and dementia. This report describes the first documentation of improved GWI symptoms in two GW veterans following 12 weeks of PBM treatments.
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Terapia por Luz de Baja Intensidad/normas , Síndrome del Golfo Pérsico/terapia , Síndrome , Humanos , Rayos Infrarrojos , Terapia por Luz de Baja Intensidad/métodos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Síndrome del Golfo Pérsico/complicaciones , Síndrome del Golfo Pérsico/epidemiología , Estados Unidos/epidemiología , United States Department of Veterans Affairs/organización & administración , United States Department of Veterans Affairs/estadística & datos numéricos , Veteranos/estadística & datos numéricosRESUMEN
Background and Objective Various irradiances have been reported to be beneficial for the treatment of neuropathic pain with near infrared light. However, the mechanistic basis for the beneficial outcomes may vary based on the level of irradiance or fluence rate used. Using in vivo and in vitro experimentalmodels, this study determined the mechanistic basis of photobiomodulation therapy (PBMT) for the treatment of neuropathic pain using a high irradiance. Study Design/Materials and Methods ln vitro experiments: Cultured, rat DRG were randomly assigned to control or laser treatment (L T) groups with different irradiation times (2, 5, 30, 60 or 120s). The laser parameters were: output power » 960 mW, irradiance » 300mW/cm2, 808 nm wavelength and spot size » 3cm diameter/ area » 7.07cm2, with different fluences according to irradiation times. Mitochondrial metabolic activity was measured with the MTS assay. The DRG neurons were immunostained using a primary antibody to ß-Tubulin III. ln vivo experiments: spared nerve injury surgery (SNI), an animal model of persistent peripheral neuropathic pain, was used. The injured rats were randomly divided into three groups (n » 5). 1) Control: SNI without LT, 2) Short term: SNI with LT on day 7 and euthanized on day 7, 3) Long term: SNI with LT on day 7 and euthanized on day 22. An 808 nm wavelength laser was used for all treatment groups. Treatment was performed once on Day 7 post-surgery. The transcutaneous treatment parameters were: output power: 10 W, fluence rate: 270 mW/cm2, treatment time: 120s. The laser probe was moved along the course of the sciatic/sural nerve during the treatment. Within 1 hour of irradiation, behavior tests were performed to assess its immediate effect on sensory allodynia and hyperalgesia caused by SNI. Results ln vitro experiments: Mitochondrial metabolism was significantly lower compared with controls for all LT groups. Varicosities and undulations formed in neurites of DRG neurons with a cell body diameter 30µm or less. ln neurites of DRG neurons with a cell body diameter of greater than 30µm, varicosities formed only in the 120s group. ln vivo experiments: For heat hyperalgesia, there was a statistically significant reduction in sensitivity to the heat stimulus compared with the measurements done on day 7 prior to LT. A decrease in the sensitivity to the heat stimulus was found in the LT groups compared with the control group on day 15 and 21. For cold allodynia and mechanical hyperalgesia, a significant decrease in sensitivity to cold and pin prick was found within 1 hour after L T. Sensitivity to these stimuli returned to the control levels after 5 days post-L T. No significant difference was found in mechanical allodynia between control and L T groups for all time points examined. Conclusion These in vitro and in vivo studies indicate that treatment with an irradiance/fluence rate at 270 m W/cm2 or higher at the level of the nerve can rapidly block pain transmission. A combination therapy is proposed to treat neuropathic pain with initial high irradiance/fluence rates for fast pain relief, followed by low irradiance/ fluence rates for prolonged pain relief by altering chronic inflammation.
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Animales , Ratas , Células Receptoras Sensoriales/metabolismo , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Ganglios Espinales , Hiperalgesia/terapia , Neuralgia/terapia , Técnicas In Vitro/métodos , Inmunohistoquímica/métodos , Análisis de Varianza , Regeneración NerviosaRESUMEN
Pulsed dye laser (PDL) is an effective treatment option for erythematotelangiectatic rosacea. The use of a test spot allows patients to experience the procedure on a small area prior to further treatment. The purpose of this study was to elucidate whether the use of a no charge test spot influenced return rates for further PDL treatment. Data were obtained retrospectively using International Classification of Diseases (ICD)-10 codes for rosacea. Sixty charts were identified: 26 patients initially received a PDL test area free of charge, whereas 34 patients initially underwent full PDL treatment. Patients who experienced the test spot laser treatment had a lower return rate compared to those that directly underwent full PDL treatment. However, this difference was not statistically significant (Fisher's exact test p = 0.2883). Future studies evaluating and identifying factors that influence PDL return rates are needed. Abbreviations: ETR: Erythematotelangiectatic rosacea; PDL: pulsed dye laser; ICD: International classification of diseases.
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Láseres de Colorantes/estadística & datos numéricos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Aceptación de la Atención de Salud/estadística & datos numéricos , Rosácea/radioterapia , Humanos , Estudios RetrospectivosRESUMEN
OBJECTIVE: To systematically review the literature on the effectiveness of low-level laser therapy for patients with carpal tunnel syndrome. DATA SOURCES: The Cochrane Library, PubMed, Embase, CINAHL, and Physiotherapy Evidence Database were searched for relevant systematic reviews and randomized controlled trials (RCTs) up to April 8, 2016. STUDY SELECTION: Two reviewers independently applied the inclusion criteria to select potential studies. DATA EXTRACTION: Two reviewers independently extracted the data and assessed the methodologic quality. DATA SYNTHESIS: A best-evidence synthesis was performed to summarize the results of the 2 systematic reviews and 17 RCTs that were included. Strong evidence was found for the effectiveness of low-level laser therapy compared with placebo treatment in the very short term (0 to ≤5wk). After 5 weeks, the positive effects of low-level laser therapy on pain, function, or recovery diminished over time (moderate and conflicting evidence were found at 7- and 12-wk follow-up, respectively). CONCLUSIONS: In the very short term, low-level laser therapy is more effective as a single intervention than placebo low-level laser therapy in patients with carpal tunnel syndrome, after which the positive effects of low-level laser therapy tend to subside. Evidence in the midterm and long term is sparse.
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Síndrome del Túnel Carpiano/radioterapia , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Modalidades de Fisioterapia/estadística & datos numéricos , Humanos , Ensayos Clínicos Controlados Aleatorios como Asunto , Resultado del TratamientoRESUMEN
OBJECTIVE: The objective of this retrospective review is to investigate the long-term effect of skin rejuvenation by the intense pulsed light (IPL) source for the treatment of photoaging. METHODS: From 5300 clinical cases that our department has treated with the IPL, the first 2534 were chosen for this study. Each patient received a minimum of 3 IPL treatments during this time-many were yearly treatments. Clinical photographs were taken on a yearly basis for up to 12 years and sent to a blinded independent panel to study the effects of continuous IPL treatments. RESULTS: Results showed that the effective rate for the IPL was between 88.24% and 96.45%. CONCLUSIONS: IPL therapy is an effective treatment for photoaging and can truly have an effect on reversing the signs of photodamage on skin.
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Dermatosis Facial/terapia , Hiperpigmentación/terapia , Tratamiento de Luz Pulsada Intensa/métodos , Terapia por Luz de Baja Intensidad/métodos , Fototerapia/métodos , Dermatosis Facial/epidemiología , Humanos , Hiperpigmentación/epidemiología , Hiperpigmentación/etiología , Tratamiento de Luz Pulsada Intensa/estadística & datos numéricos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Rejuvenecimiento , Estudios Retrospectivos , Luz Solar/efectos adversos , Resultado del TratamientoRESUMEN
BACKGROUND: Laser therapy, for its established analgesic properties with minimal side effects, has been used for the treatment of chronic pain. However, it has not been used for the treatment of acute postoperative pain. This pilot study was designed to assess the feasibility and efficacy of Class IV laser on postoperative pain relief following off-pump coronary artery bypass graft (OPCABG) surgery, as a component of multimodal analgesia (MMA) technique. METHODS: This open observational prospective study comprised of 100 adult patients (84 male, 16 female) who underwent OPCABG through sternotomy. For postoperative analgesia, they were subjected to laser therapy subjected to laser therapy in addition to the standard institutional pain management protocol comprising of IV infusion/bolus of tramadol and paracetamol and fentanyl bolus as rescue analgesic. Pain intensity was measured by Verbal Rating Scale (VRS). The laser therapy was scheduled as once a day regime for three consecutive postoperative days (PODs) starting on POD 1, 30 min following tracheal extubation. The subsequent laser applications were also scheduled at the same time of the day as on day 1 if VRS was ≥5. 10 W Class IV laser was applied over 150 cm² sternal wound area for 150 s. VRS was used to assess pain severity and was recorded for statistical analysis using Friedman Test. RESULTS: The mean (standard deviation [SD]) VRS of all the 100 patients just before application of the first dose of laser was 7.31 (0.94) while on MMT; the same fell to 4.0 (1.279) and 3.40 (2.697) at 1 h and 24 h respectively following first dose of laser. The change of VRS over first 24 h among all the 100 patients was statistically significant (P = 0.000). Laser was re-applied in 40 patients whose VRS was ≥5 (mean [SD] - 6.38 [0.868]) at 24th h. After receiving the 2nd dose of laser the VRS scores fell significantly (P = 0.000) and became 0 at 54th h. No patients required 3rd dose of the laser. No patient required rescue analgesic while on laser therapy. CONCLUSION: Class IV laser can be an effective technique for postoperative analgesia following OPCABG surgery through sternotomy when included as a component of MMA technique.
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Puente de Arteria Coronaria Off-Pump/efectos adversos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Dolor Postoperatorio/terapia , Analgésicos no Narcóticos , Analgésicos Opioides , Terapia Combinada , Estudios de Factibilidad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Dolor Postoperatorio/tratamiento farmacológico , Dolor Postoperatorio/radioterapia , Proyectos Piloto , Estudios Prospectivos , Resultado del TratamientoRESUMEN
One of the complications of radiotherapy and chemotherapy is oral mucositis. Since the low energy laser is one of the most frequently recommended interventions by authors and international societies, the aim of this study is to review the scientific evidence on the use of lasers as a preventive and therapeutic in oral mucositis associated with treatment of cancer. We performed a literature search in PubMed and The Cochrane Collaboration Library, limiting the search to the last 20 years. We finally included 29 articles that contained 30 studies. Low energy laser phototherapy seems a promising intervention in both the prevention and treatment of oral mucositis associated with cancer treatment. Virtually all studies reviewed showed good results with no adverse effects and reductions in both incidence and severity of mucositis in all types of cancer treatments.
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Antineoplásicos/efectos adversos , Irradiación Craneana/efectos adversos , Neoplasias de Cabeza y Cuello/complicaciones , Terapia por Luz de Baja Intensidad , Estomatitis/prevención & control , Estomatitis/terapia , Trasplante de Médula Ósea , Estudios de Casos y Controles , Quimioradioterapia/efectos adversos , Método Doble Ciego , Neoplasias de Cabeza y Cuello/tratamiento farmacológico , Neoplasias de Cabeza y Cuello/radioterapia , Humanos , Terapia por Luz de Baja Intensidad/métodos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Estudios Prospectivos , Ensayos Clínicos Controlados Aleatorios como Asunto , Estomatitis/etiología , Resultado del TratamientoRESUMEN
Low-level lasers are used in general therapy and healing process due to their good photo-bio-stimulation effects. In this paper, the effects of diode laser and Nd:YAG laser on the healing process of practically managed skeletal muscle trauma has been successfully studied. Standard impact trauma was induced by using a specially designed mechanical device. The impacted muscle was left for 3 days for complete development of blunt trauma. After that it was irradiated by five laser sessions for 5 days. Two types of lasers were used; 785-nm diode laser and 1.064-nm Nd:YAG laser, both in continuous and pulsed modes. A special electronic circuit was designed and implemented to modulate the diode laser for this purpose. Tissue samples of crushed skeletal muscle have been dissected from the injured irradiated muscle then bio-chemically analyzed for the regeneration of contractile and collagenous proteins using Lowry assay for protein determination and Reddy and Enwemeka assay for hydroxyproline determination. The results showed that both lasers stimulate the regeneration capability of traumatized skeletal muscle. The diode laser in CW and pulsed modes showed better results than the Nd:YAG in accelerating the preservation of the normal tissue content of collagenous and contractile proteins beside controlling the regeneration of non-functional fibrous tissue. This study proved that the healing achieved by the laser treatment was faster than the control group by 15-20 days.
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Terapia por Luz de Baja Intensidad , Músculo Esquelético/lesiones , Músculo Esquelético/efectos de la radiación , Animales , Láseres de Semiconductores/uso terapéutico , Láseres de Estado Sólido/uso terapéutico , Terapia por Luz de Baja Intensidad/instrumentación , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Masculino , Proteínas Musculares/metabolismo , Músculo Esquelético/metabolismo , Ratas , Regeneración/efectos de la radiación , Cicatrización de Heridas/efectos de la radiaciónRESUMEN
A terapia com laser de baixa potencia se tornou algo de inúmeras pesquisas,devido a melhora do processo cicatricial.Um estudo experimental foi realizado para avaliar se há benefícios dessa terapia na cicatrização de feridas na pele de ratos com análises não pareadas e pareadas. Foram utilizados 20 ratos Wistar dividos em 4 grupos, submetidos a 4 incisões lineares na pele do dorso.No Grupo 1, usamos uma dose de laser no pós-operatório; no Grupo 2, duas doses, uma no pós-operatório e após 24 horas; no Grupo 3, três doses, no pós-operatório , 24 e 48 horas.O grupo controle foi submetido às incisões da pele.Foram testadas a força de ruptura e analisados os achados histopatológicos das incisões.Em análise não pareada, o grupo 1 apresenta o maior valor, tendo diferença (p = 0,040). A força de ruptura dos quatro grupos de ratos para as feridas não tratadas, não ocorreu. Na análise pareada as feridas tratadas com laser nos grupos 1, 2 e 3 e grupo controle, não houve diferença. Em análise não pareada, segundo a epitelização e a granulação, o grupo 3 apresentou maior freqüência para epitelização (p=0,002) e granulação (p=0,012).Nas feridas não tratadas nos quatro grupos não houve diferença entre elas em relação à epitelização e à granulação. Na análise pareada, não ocorreram diferenças dessas para os ferimentos produzidos nos grupos.É improvável existir relação entre a terapia a laser e a cicatrização, sendo a associação na análise não pareada apenas aparente, justificada pelo método de avaliação .(AU)
Low power laser therapy is recently in focus due to its properties in angiogenesis, fibroblast and colagenase activity. Based on these facts, the benefits of low laser power therapy in wound healing have been considered. In order to evaluate the benefits of low power therapy in wound healing, twenty Wistar rats were divided into four groups (n=5) which received four linear incisions in the back and then the following treatments, 1: a post-incision laser dose 2: one post-incision and 24 hours later dose 3: one post-incision, 24 and 48 hours later laser doses. 4: control group, with the four skin incisions and no laser therapy. Rupture force and histopathological analyses were performed. Unpaired analyses showed that epithelialization (p= 0.002) and granulation (p=0.012) were more frequent. But there were no differences between groups, using paired analyses. Thus, it is not likely that there is a correlation between low power laser treatment and wound healing. Our findings using unpaired analyses can be justified by the findings using unpaired analyses can be justified by the method of analyses.(AU)
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Animales , Femenino , Ratas , Cicatrización de Heridas , Herida Quirúrgica/radioterapia , Ratas Wistar , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Herida Quirúrgica/fisiopatologíaRESUMEN
Various physico-chemical tissue optical clearing (TOC) methods have been suggested to maximize photon density in tissue. In order to enhance photon density, a compression-controlled low-level laser probe (CCLLP) system was developed by utilizing the principle of mechanical tissue compression. Negative compression (NC) was applied to the laser probes built in various diameters and simultaneously the laser was irradiated into ex-vivo porcine skin samples. Laser photon density (LPD) was evaluated as a function of NC and probe diameter by analyzing 2D diffusion images of the laser exposures. The CCLLP system resulted in a concentrated laser beam profile, which means enhancement of the LPD. As indicators of LPD, the laser peak intensity increased and the full width at half maximum (FWHM) decreased as a function of NC. The peak intensity at 30 kPa increased 2.74, 3.22, and 3.64 fold at laser probe diameters of 20, 30, and 40 mm, respectively. In addition, sample temperature was measured with a thermal camera and increased 0.4 K at 30 kPa after 60 s of laser irradiation as a result of enhanced LPD. The CCLLP system effectively demonstrated enhancement of the LPD in tissue and potentially its clinical feasibility.
Asunto(s)
Terapia por Luz de Baja Intensidad/instrumentación , Animales , Fenómenos Biomecánicos , Fuerza Compresiva , Diseño de Equipo , Calor , Humanos , Técnicas In Vitro , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Modelos Teóricos , Piel/efectos de la radiación , Fenómenos Fisiológicos de la Piel , Sus scrofaRESUMEN
UNLABELLED: Lesions of port-wine stain (PWS) type are the most commonly occurring vascular malformations of the skin which concerns about 0.3% of the population. These important from aesthetic and psychological points of view capillaries malformations have always been difficult for treatment. Previously applied methods consisting in cryosurgery, dermabrasion, radiation therapy or surgery and skin grafting produced unsatisfactory results. It was only when highly selective lasers were introduced that PWS could be treated effectively and safely. A lot of available lasers and lack of experience of the health care providers result in not always proper qualification of the lesions to the given laser type. The aim of the study was to present a prospective analysis of the efficacy of treatment of PWS vascular malformations by means of KTP 532 nm laser. From January 2003 to May 2005, 155 patients (115 women, 40 men) aged from 2 to 62 years (mean age 18.23) were treated by means of laser at the Plastic Surgery Hospital in Polanica Zdrój, Poland. In the investigated population, the vascular malformation was a component of Sturge-Weber syndrome in 7 patients, Klippel-Trenaunay syndrome--in 2 patients, while in one case it accompanied Recklinghausen disease. The vascular lesions had not been treated before in majority of cases, while in 37 patients the laser therapy was the continuation of other previously attempted treatment, which included excision and skin grafting, argon laser therapy, radiation therapy and pulsed dye laser treatment. The procedures were performed with at least 4-week intervals without, or under local and in children general anaesthesia. Therapeutic efficacy was evaluated independently by 3 surgeons and a photographer on the basis of Subjective Scoring System (SSS) comparing simultaneously shown pictures of the patients taken prior to and after the last procedure. The outcomes of treatment were classified according to a 4-degree scale: excellent outcome--75-100% improvement, with 100% perceived as eradication of the lesion; good--50-74% improvement; fair--25-49% improvement and poor--less than 25% improvement, including no observable improvement. In 81% of the lesions (126 patients) treatment with KTP 532 nm laser produced significant improvement which was found satisfactory by the patient. excellent outcome of treatment was obtained in 49 patients (31%), good in 42 (27%), fair in 35 (23%). However, despite many laser treatments using various energy and pulse duration, there was almost not observable improvement in 19% of the study population (29 patients). The PWS which failed to treatment were most commonly located on the limbs. The results of treatment was poor in 74% of malformations which were located beyond the face and neck (all of them were on the limbs). There was no episodes of scarring or persistent pigmentary changes in any of the patients. CONCLUSIONS: 1. KTP (532 nm) laser is an effective and safe tool in the management of capillary malformations of PWS type. 2. The treatment is especially effective in adults and in lesions localized to the face and neck area. 3. Port-wine stain localized on the trunk and extremities often appears to be KTP laser resistant.
Asunto(s)
Terapia por Luz de Baja Intensidad/métodos , Mancha Vino de Oporto/radioterapia , Adolescente , Adulto , Niño , Preescolar , Femenino , Humanos , Lactante , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Satisfacción del Paciente/estadística & datos numéricos , Polonia , Mancha Vino de Oporto/epidemiología , Mancha Vino de Oporto/patología , Estudios Retrospectivos , Resultado del TratamientoRESUMEN
Rosacea is a chronic disease that affects millions of men and women. Topical and oral antibiotics are effective, yet often leave individuals with treatment plateau associated erythema and persistent flushing. We investigated the use of intense pulsed light for treatment of the redness, flushing, and breakouts associated with rosacea. Thirty-two consecutive patients of Fitzpatrick skin types I-III underwent 1 to 7 treatments with intense pulsed light. Patients were assessed clinically and photographically. In addition, patients completed a detailed questionnaire regarding their response to treatment. Following treatment, eighty-three percent of patients had reduced redness, 75% noted reduced flushing and improved skin texture, and 64% noted fewer acneiform breakouts. Complications were minimal and transitory. It appears that intense pulsed light is an effective treatment for the signs and symptoms of rosacea and represents a new category of therapeutic options for the rosacea patient.
Asunto(s)
Técnicas Cosméticas , Fototerapia/métodos , Rosácea/terapia , Adulto , Anciano , Técnicas Cosméticas/estadística & datos numéricos , Femenino , Humanos , Terapia por Luz de Baja Intensidad/métodos , Terapia por Luz de Baja Intensidad/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Fototerapia/estadística & datos numéricos , Rosácea/patologíaRESUMEN
Like all medical procedures laser therapy comes with inherent risks and complications. Because of the increased risk in epidermal side effects when performing laser therapy on patients with darker skin, a higher level of laser expertise and clinical experience in treating darker ethnic skin is recommended to ensure that patients are treated safely. Test spots should always be done as an aid to selecting safe and efficacious treatment parameters. Because of the limited experience in treating patients with darker skin a conservative approach should always be used. Unfortunately, there are no national policies establishing credentialing requirements for those planning to practice laser surgery. The US Food and Drug Administration are responsible for granting individual laser manufacturers' permission to market their lasers for specific indications. The Food and Drug Administration also recommends operator training to use these lasers, but credentialing is a state function and consequently standards for laser therapy vary greatly from state to state. Until the bar is raised and national credentialing polices on laser therapy are established clinicians must police themselves and fully be aware of their capabilities and limitations to ensure that all patients regardless of skin color or ethnicity receive safe and effective treatments.