Eficacia de la aplicación de ozono epidural y paravertebral a una concentración de 30 μg/ml para el manejo de dolor crónico en pacientes con síndrome de cirugía fallida de espalda

objective: to determine the efficacy of epidural and paravertebral infiltration of ozone at a concentration of 30 μg/ml for chronic pain control in patients with failled back surgery syndrome. method: a quasi-experimental clinical trial, prospective study, in 30 patients with chronic pain secondary to lumbar post laminectomy syndrome, with a total of 4 injections of ozone, in the first procedure 20 ml infiltration of ozone at 30 μg/ml caudal epidural, in addition to infiltrate 10 ml of ozone at the same concentration paravertebral lumbar level at l3, l4 and l5 bilaterally, with a total of 60 ml muscular paravertebral. performing the following injections each week for three weeks only in the muscular paravertebral region. pain was assessed by visual analog scale and function by oswestry disability index, following the initial procedure, a week, 4 weeks and 2 months. results: with30 patients studied 70% were women (21) and 30% male (9). not found improvement in pain relief according to the evaluation of the visual analog scale, with a starting average of 7.2 and a final 7.4, no statistical significance. in functional capacity evaluated by the oswestry disability index, initial 63.47 and final 64.37, without a statistical significance. the complications were pain after to the application 40% (12),increased disability 13.33% (4) and headache 3% (1). conclusion: the use of epidural and paravertebral ozone at a concentration of 30 μg/ml, is not effective for the relief of chronic pain secondary to post laminectomy syndrome.