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      Photobiomodulation as an adjuvant in the pharmacological treatment of trigeminal neuralgia. Case report Translated title: Fotobiomodulação como adjuvante no tratamento farmacológico da neuralgia trigeminal. Relato de caso

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          Abstract

          ABSTRACT BACKGROUND AND OBJECTIVES: Trigeminal Neuralgia causes intense suffering and impaired quality of life. The diagnosis is clinical. Thermography has been proven to be a useful tool, both for confirming and monitoring this neuralgia. Photobiomodulation is being increasingly well documented, specially when associated with the first-choice therapy, which is pharmacotherapy. In this case report, the objective was to investigate the performance of the laser, associated with anticonvulsants, in a patient with trigeminal neuralgia, considering its results from a clinical and thermographic point of view. CASE REPORT: Male patient, 62 years old, presenting idiopathic trigeminal neuralgia, diagnosed 4 years before, being controlled with oxcarbazepine (600mg), divided in 2 daily doses, being the dose doubled in the last year. In the last 4 months, the symptoms worsened with the increase in the drug dosage, generating side effects not supported by the patient. Photobiomodulation was proposed as a complementary treatment, with infrared thermography being performed before and after treatment. After the low-intensity laser therapy protocol, there was a significant improvement, demonstrated both by the patients report and the thermography, maintaining this result in the 6-month control. The dosage was reduced to 300 mg/day, restoring quality of life. CONCLUSION: Low-intensity infrared laser photobiomodulation can be extremely useful when associated with an appropriate drug in the control of idiopathic trigeminal neuralgia, both in the immediate and medium-term outcome.

          Translated abstract

          RESUMO JUSTIFICATIVA E OBJETIVOS: A neuralgia trigeminal provoca intenso sofrimento e comprometimento da qualidade de vida. O diagnóstico é clínico. A termografia tem se mostrado uma ferramenta útil tanto para a confirmação quanto para o acompanhamento dessa neuralgia. A fotobiomodulação está cada vez mais bem documentada, em especial quando associada com a terapia de primeira escolha, que é a farmacoterapia. O objetivo deste estudo foi investigar a atuação do laser, associado a anticonvulsivante, em paciente com neuralgia trigeminal, considerando os seus resultados sob o ponto de vista clínico e termográfico. RELATO DO CASO: Paciente do sexo masculino, 62 anos, portador de neuralgia trigeminal idiopática, diagnosticado há 4 anos, sendo controlado com oxcarbazepina (600mg), dividida em 2 doses diárias, sendo esta dose dobrada no último ano. Nos últimos quatro meses os sintomas se agravaram com o aumento da dose do fármaco, gerando efeitos adversos não suportados pelo paciente. Foi proposta a fotobiomodulação como tratamento complementar, sendo realizada a termografia infravermelha antes e depois do tratamento. Após o protocolo de laserterapia de baixa intensidade, houve melhora significativa, demonstrada tanto pelo relato do paciente quanto observado pela termografia, mantendo-se esse resultado no controle de seis meses. O fármaco foi reduzido para 300mg/dia, o que devolveu ao paciente a qualidade de vida. CONCLUSÃO: A fotobiomodulação por laser de baixa intensidade infravermelho pode ser extremamente útil quando associada a um adequado fármaco no controle da neuralgia trigeminal idiopática, tanto no resultado imediato quanto a médio prazo.

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          Most cited references18

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          Use of low level laser therapy to control neuropathic pain: A systematic review

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            Effect of photobiomodulation therapy (808 nm) in the control of neuropathic pain in mice.

            Neuropathic pain can be defined as the pain initiated or caused by a primary lesion or dysfunction of the central or peripheral nervous system. Photobiomodulation therapy (PBM) stands out among the physical therapy resources used for analgesia. However, application parameters, especially the energy density, remain controversial in the literature. Therefore, this study aimed to investigate the PBM effect, in different energy densities to control neuropathic pain in mice. Fifty (50) mice were induced to neuropathy by chronic constriction surgery of the sciatic nerve (CCI), treated with PBM (808 nm), and divided into five groups: GP (PBM simulation), GS (sham), GL10, GL20, GL40 (energy density of 10, 20, and 40 J/cm(2), respectively). The evaluations were carried out using the hot plate test and Randall and Selitto test, before and after the CCI surgery, every 15 days during the 90 days experiment. β-Endorphin blood dosage was also tested. For both the hot plate and Randall and Selitto tests, the GL20 and GL40 groups presented reduction of the nociceptive threshold from the 30th day of treatment, the GL10 group only after day 75, and the GP group did not show any improvement throughout the experiment. The β-endorphin dosage was higher for all groups when compared to the GP group. However, only the GL20 group and GL40 presented a significant increase. This study demonstrates that PBM in higher energy density (20, 40 J/cm(2)) is more effective in the control of neuropathic pain.
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              The mechanistic basis for photobiomodulation therapy of neuropathic pain by near infrared laser light.

              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 experimental models, this study determined the mechanistic basis of photobiomodulation therapy (PBMT) for the treatment of neuropathic pain using a high irradiance.
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                Author and article information

                Journal
                brjp
                BrJP
                BrJP
                Sociedade Brasileira para o Estudo da Dor (São Paulo, SP, Brazil )
                2595-0118
                2595-3192
                September 2020
                : 3
                : 3
                : 285-287
                Affiliations
                [2] São Paulo São Paulo orgnameUniversidade de São Paulo orgdiv1Departamento de Estomatologia orgdiv2Disciplina de Radiologia Brazil
                [1] São Paulo São Paulo orgnameUniversidade Nove de Julho orgdiv1Programa de Pós-Graduação em Biofotônica Aplicada às Ciências da Saúde Brazil
                Article
                S2595-31922020000300285 S2595-3192(20)00300300285
                10.5935/2595-0118.20200042
                40f01cfb-0b3a-4065-a4b6-4f008749fe2f

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 21 January 2020
                : 13 May 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 18, Pages: 3
                Categories
                Cases Reports

                Termografia,Laser therapy,Terapia a laser,Thermography,Neuralgia do trigêmeo,Trigeminal Neuralgia

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