title: A prospective outcomes study of patients undergoing intradiscal electrothermy (IDET) for chronic low back pain.
abstract: This prospective, non-randomized clinical trial was designed to determine the clinical outcome of patients who underwent Intradiscal Electrotherapy (IDET) for the treatment of chronic discogenic low back pain. Twenty-seven consecutive patients undergoing IDET were prospectively evaluated. All patients, as determined by provocative discography and/or MRI, had discogenic disease with chronic low back pain and were non-responsive to conservative treatment for at least 6 months. The mean pre-operative duration of symptoms was 38 months. The American Association of Neurological Surgeons/Congress of Neurological Surgeons Joint Section Lumbar Disc Herniation Study Questionnaire, which includes the Oswestry Low Back Pain Disability Questionnaire and the Short Form (SF) -36 Health Status Questionnaire, was used. The follow-up endpoint for all patients was one year. Seventy-five percent of patients improved based upon the Oswestry Low Back Pain Disability Questionnaire while only 48% of patients were found to improve on the SF-36 Survey. The SF-36 Bodily Pain Subscale did improve relative to other subscales in 52% of patients. There was no relationship found between outcome and duration of symptoms (p= .32), number of levels treated (p= .20), or worker's compensation (p= .38). There were no complications that resulted from the IDET treatment. IDET was found to be effective in 75% of patients in improving their chronic low back pain. This did not translate into a significant improvement in the SF-36 survey scores. The risks are negligible, and recovery time is minimal. The procedure may be useful in selected patients who would otherwise undergo an interbody fusion procedure.
authors.affiliation: Department of Neurological Surgery, University of Pittsburgh School of Medicine, UPMC-Health System, Presbyterian University Hospital, Suite B-400, 200 Lothrop Street, Pittsburgh, PA 15213, USA. gerszten@neuronet.pitt.edu
authors.forename: Peter C
authors.initials: PC
authors.lastname: Gerszten
authors.forename: William C
authors.initials: WC
authors.lastname: Welch
authors.forename: Paula M
authors.initials: PM
authors.lastname: McGrath
authors.forename: Shari L
authors.initials: SL
authors.lastname: Willis