Brazilian Journal of Pain
https://brjp.org.br/article/doi/10.5935/2595-0118.20190006
Brazilian Journal of Pain
Original Article

Immediate analgesic effect of 2KHz interferential current in chronic low back pain: randomized clinical trial

Efeito analgésico imediato da corrente interferencial de 2KHz na dor lombar crônica: ensaio clínico randomizado

Nicole Almeida; Luis Henrique Paladini; Madeline Pivovarski; Fernanda Gaideski; Raciele Ivandra Guarda Korelo; Ana Carolina Brandt de Macedo

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Abstract

BACKGROUND AND OBJECTIVES: Interferential current is widely used in clinical practice for the treatment of low back pain, but there is no literature consensus regarding its parameters. The objective of this study was to analyze the immediate effect of the 2KHz interferential current in chronic low back pain.

METHODS: This randomized controlled clinical trial was previously approved by the Research Ethics Committee of the Federal University of Paraná, with the participation of 105 individuals with chronic low back pain (>12 weeks) of both genders. Participants were randomized in 3 groups: placebo group (PG, n=35), electrical stimulus off; interferential current1 (IG1, n=35), carrier frequency 2KHz, AMF of 2Hz, motor intensity level and IG2, n=35, carrier frequency 2KHz, AMF of 100Hz, sensory intensity level. All groups were subjected to a single application for 30 minutes with 4 electrodes in a crossed-shape position in the lumbar region.

RESULTS: The visual analog scale, McGill pain scale, Oswestry Low Back disability questionnaire, Roland Morris disability questionnaire and Algometria of pressure were used for evaluation and revaluation.

CONCLUSION: It may be noticed that by the visual analog scale and questionnaires, the interferential current provided an immediate analgesic effect in chronic lumbar pain regardless of the mode of stimulation.

Keywords

Analgesia, Chronic pain, Electric stimulation therapy, Low back pain

Resumo

JUSTIFICATIVA E OBJETIVOS: A corrente interferencial é amplamente utilizada na prática clínica para o tratamento da dor lombar, porém não há consenso na literatura sobre seus parâmetros. O objetivo deste estudo foi analisar o efeito imediato da corrente interferencial de 2KHz na dor lombar crônica.

MÉTODOS: Ensaio clínico, controlado randomizado, foi previamente aprovado pelo Comitê de Ética em Pesquisa da Universidade Federal do Paraná. Participaram 105 indivíduos com dor lombar crônica (>12 semanas), de ambos os sexos. Os participantes foram randomizados em 3 grupos: grupo placebo (GP, n=35), estímulo elétrico desligado, grupo interferencial1 (GI1, n=35), frequência portadora de 2KHz, AMF de 2Hz, intensidade a nível motor e grupo interferencial2 (GI2, n=35), frequência portadora de 2KHz, AMF de 100Hz, intensidade a nível sensorial. Todos os grupos foram submetidos a uma única aplicação durante 30 minutos, com 4 eletrodos posicionados de maneira cruzada na região lombar.

RESULTS: Para avaliação e reavaliação, foi utilizada a escala analógica visual, escala da dor de McGill, Questionário de dor lombar de Oswestry, Questionário de Incapacidade de Roland-Morris e Algometria de Pressão.

CONCLUSÃO: Pode-se perceber que, pela escala analógica visual e pelos questionários, a corrente interferencial proporcionou efeito analgésico imediato na dor lombar crônica independentemente do modo de estimulação.

Palavras-chave

Analgesia, Dor crônica, Dor lombar, Terapia por estimulação elétrica

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Submitted date:
09/28/2018

Accepted date:
12/10/2018

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