Treatment Options for Failed Back Surgery Syndrome: An Umbrella Systematic Review of Systematic Reviews on the Effectiveness of Therapeutic Interventions.

Background: Failed back surgery syndrome (FBSS) is a common and incapacitating condition affecting patients with previous spine surgery in whom treatment approach can be challenging. This study aimed to summarize existing secondary studies and up-to-date randomized clinical trials (RCTs) that assess the effectiveness of available treatment options for FBSS. Methods: Systematic searches were carried out in five databases (PubMed, Cochrane, Scielo, Epistemonikos, and Google scholar) for all systematic reviews on the effectiveness of treatment options for FBSS published after 2012. Outcomes of interest were pain levels measured through visual analog scale or numeric rating scale, Oswestry Disability Index, and quality of life. Methodological and risk of bias assessments were performed with the AMSTAR-2 tool for systematic reviews and the Joanna Briggs Institute checklist for RCT. Prospective PROSPERO registration: CRD42022307609. Results: Fifteen studies, seven systematic reviews, and eight RCTs met the inclusion criteria and fulfilled the methodological quality assessment. Of the 15 included studies, 8 were on neurostimulation, 4 on adhesiolysis, 4 on epidural or intrathecal injections, and 3 on other treatment modalities. The risk of bias was low in seven studies, moderate in five, and high in three. Conclusions: Based on this systematic overview and the considerable heterogeneity among studies, the FBSS therapeutic approach must be individualized. FBSS treatment should start with conservative management, considering the implementation of neurostimulation, a technique with the most robust evidence of effective results, in cases of refractory axial or neuropathic pain. As the last resource, in light of the evidence found, more invasive procedures or new surgical interventions are indicated.

Modic Changes in Ecuadorian Mestizo Patients: Epidemiology, Clinical Significance, and Role in Chronic Low Back Pain.

Modic changes (MC) are bone marrow lesions seen within a vertebral body on MRI, possibly associated with low back pain (LBP). Though the causes and mechanisms responsible for the formation of MC are still poorly understood, progress is being made in linking his spinal phenotype with disc degeneration and LBP. This paper analyzes the epidemiology, clinical signs, lesions type, and treatment of vertebral discopathy associated with MC in Ecuadorian mestizo patients, comparing MC type I-II changes versus MC type III differences. We performed an epidemiological, observational, cross-sectional study with two cohorts of Mestizo patients collected at "Hospital de los Valles" in Quito, Ecuador, between January 2017 and December 2020; 288 patients diagnosed with degenerative lumbar disc disease plus MC was taken who underwent surgery; 144 with MC type I-II (cohort 1) and 144 with MC type III changes (cohort 2). Cohort 1 was characterized by 68.8% of men with a mean age of 45 years who perform minimal or moderate exercise in 82% of cases. They showed only one level lesion in 88.9% of patients with a pain intensity of 7 or more on the visual analog scale, with three or more months of evolution, in 78.5% of cases of degenerative etiology, mainly between the L5-S1 lesion of the left side. Cohort 2 was 53.5% of women with a mean age of 62. In 81.4% of cases, they perform minimal or moderate exercise. They showed two-level lesions in 45.8% of patients with a pain intensity of 7 or more on the visual analog scale, with three or more months of evolution, in 97.9% of cases of degenerative etiology, mostly between L4-L5 lesions of the left side. In both groups, most patients showed a protruded and lateral hernia. There is a greater predisposition to require surgery for lumbar disc herniation in young men and older women. In addition, surgery at an older age has a higher risk of complications, especially infection.

Cognitive functional therapy (CFT) compared with core training exercise (CTE) in patients with failed back surgery syndrome (FBSS): A study protocol for a randomized controlled trial.

OBJECTIVE: This study aims to investigate the efficacy of cognitive functional therapy (CFT) compared to core training exercise (CTE) on pain and specific disability of patients with failed back surgery syndrome (FBSS). DESIGN: This will be a randomized controlled clinical trial of two groups with blinded evaluators. SETTING: The study will be conducted at the Federal University of Santa Catarina (UFSC) and a private clinic in Florianópolis, SC, Brazil. PARTICIPANTS: A total of 80 participants, of both sexes, with FBSS. INTERVENTION: Subjects will be randomized into two groups: one group receiving CFT or CTE. Individuals will be assisted once a week, for a maximum period of 12 weeks, with four being the minimum number of visits and 12 being the maximum number of visits. MEASUREMENTS: The primary outcomes will be pain and specific disability. CONCLUSIONS: This is the first study investigating whether CFT is efficacious for patients with FBSS and chronic low back pain. The study's sample size was calculated to detect the effect of clinically relevant treatment with a low risk of bias. This clinical trial was designed to be able to reproduce an approach as a physiotherapist trained in CFT would do. That is, in a pragmatic way, increasing the significance of this study. CTE comprises a strategy widely used by physiotherapists to treat low back pain. Given that the scientific evidence of its efficacy for pain management is limited, the findings of this study will assist physiotherapists in their clinical decision-making.

Evaluation of rod breakage after three-column osteotomy / Avaliação da quebra de haste após realização de osteotomia das três colunas / Evaluación de la rotura de varilla después de realización de osteotomía de las tres columnas

ABSTRACT Objective To identify the incidence and possible risk factors associated with rod breakage in patients who underwent vertebral column resection (VCR) or pedicle subtraction osteotomy (PSO) to treat complex deformities of the spine. Methods Retrospective analysis of a series of 32 patients operated from 2014 to 2018 in a single center. The patients were analyzed for demographic (sex, age), biometric (BMI), radiographical (pre- and postoperative angular variations), and surgical (arthrodesed and osteotomized levels) characteristics. Descriptive analyses were performed for the numerical variables (mean, standard deviation, maximum, median, and minimum) and frequency analysis was performed for the categorical variables. Logistic regression analysis was performed for the dependent variable "rod breakage", using a stepwise technique to select the variables for the best model, assuming statistical significance of 0.05. Results Of the 32 patients selected, rod breakage occurred in 34.4%. Mean age was 36.6 years (± 19.8), ranging from 10 to 74 years, and the mean BMI was 25.1 (±6.0). Most patients were subjected to VCR (75.0%), were males (56.2%) and did not smoke (90.6%). Logistic regression analysis showed that "arthrodesed levels" were was positively associated with rod breakage (OR 1.72; CI95%: 1.13-3.10; p<0.05). The other factors were not associated with breakage. Conclusion Rod breakage is a frequent complication after three-column osteotomy, especially in long constructions. Level of evidence III; Retrospective Study.

RESUMO Objetivos Identificar a incidência e possíveis fatores de risco relacionados à quebra de hastes em pacientes submetidos à ressecção colunar vertebral (RCV) ou osteotomia de subtração pedicular (OSP) para o tratamento cirúrgico de doenças complexas da coluna vertebral. Métodos Análise retrospectiva de uma série de 32 pacientes operados de 2014 a 2018, em um único centro. Os pacientes foram avaliados quanto às características demográficas (sexo, idade), biométricas (IMC), radiológicas (variação angular antes e após a correção) e cirúrgicas (níveis artrodesados, níveis osteotomizados). As análises descritivas foram realizadas para as variáveis numéricas (média, desvio-padrão, máximo, mediana e mínimo) e, para as variáveis categóricas foi realizada a análise da frequência. Realizou-se análise de regressão logística para a variável dependente "quebra", utilizando a técnica stepwise para seleção das variáveis que compõem o melhor modelo, considerando o nível de significância de 0,05. Resultados Foram selecionados 32 pacientes; a proporção de quebra foi de 34,4%. Observou-se que a média de idade foi de 36,6 anos (± 19,8 anos), distribuindo-se entre 10 e 74 anos, e o IMC médio foi 25,1 (± 6,0). Verificou-se que a maior parte dos indivíduos foi submetida a técnica RCV (75,0%), era do sexo masculino (56,2%) e não fumava (90,6%). Na análise de regressão logística, "níveis artrodesados" associou-se positivamente à quebra (OR 1,72; IC95%; 1,13-3,10; p < 0,05). Os outros fatores não se associaram à quebra. Conclusão A quebra de hastes é uma complicação frequente das osteotomias das três colunas, principalmente, em construções longas. Nível de evidência III; Estudo Retrospectivo.

RESUMEN Objetivos Identificar la incidencia y los posibles factores de riesgo relacionados a la rotura de varillas en pacientes sometidos a resección de la columna vertebral (RCV) u osteotomía de sustracción pedicular (OSP) para el tratamiento quirúrgico de enfermedades complejas de la columna vertebral. Métodos Análisis retrospectivo de una serie de 32 pacientes operados desde 2014 hasta 2018, en un único centro. Los pacientes fueron evaluados cuanto a las características demográficas (sexo, edad), biométricas (IMC), radiológicas (variación angular antes y después de la corrección) y quirúrgicas (niveles artrodesados, niveles osteotomizados). Los análisis descriptivos fueron realizados para las variables numéricas (promedio, desviación estándar, máximo, mediana y mínimo) y, para las variables categóricas fue realizado el análisis de frecuencia. Se realizó análisis de regresión logística para la variable dependiente «rotura¼, utilizando la técnica stepwise para selección de las variables que componen el mejor modelo, considerando el nivel de significancia de 0.05. Resultados Fueron seleccionados 32 pacientes; la proporción de rotura fue de 34,4%. Se observó que el promedio de edad fue de 36,6 años (± 19,8 años), distribuyéndose entre 10 a 74 años, y el IMC promedio fue de 25,1 (± 6,0). Se verificó que la mayor parte de los individuos fue sometida a la técnica RCV (75,0%), era del sexo masculino (56,2%) y no fumaba (90,6%). En el análisis de regresión logística, los "niveles artrodesados" se asociaron positivamente a la rotura (OR 1,72; IC 95%; 1,13-3,10; p <0,05). Los otros factores no se asociaron a la rotura. Conclusión La rotura de varillas es una complicación frecuente de las osteotomías de tres columnas, principalmente en construcciones largas. Nivel de evidencia III; Estudio Retrospectivo.

Dolor crónico post cirugía de columna lumbar: magnitud del problema y opciones terapéuticas / Chronic pain after lumbar spine surgery: magnitude of the problem and therapeutic options

El dolor crónico postoperatorio de cirugía de columna lumbar tiene una incidencia entre un 10-50 por ciento de los pacientes postoperados, siendo de difícil manejo. Se ha denominado síndrome de fracaso de cirugía espinal lumbar (FBSS) a aquellos pacientes que han sido beneficiarios de una cirugía del raquis lumbosacro y en quienes no se logra una mejoría de manera satisfactoria, presentando dolor crónico lumbar, siendo su incidencia de alrededor de un 20 por ciento, y debido a una mala evolución del proceso de recuperación que puede ocasionar fibrosis en el canal medular. Existen diversas alternativas terapéuticas para afrontar este problema, donde destacan el tratamiento farmacológico, medicina física y el abordaje intervencionista no quirúrgico y quirúrgico implementados últimamente, con el fin de disminuir de manera efectiva el dolor en este grupo de pacientes. Sin embargo, a pesar de las terapias combinadas, existe un grupo de pacientes que debe ser sometido a una nueva intervención quirúrgica con resultados poco promisorios.

Chronic postoperative pain of lumbar spine surgery has an incidence between 10-50 percent of postoperative patients, being difficult to manage. The Failed Back Surgery Syndrome (FBSS) has been referred to those patients who have been beneficiaries of lumbosacral spinal surgery and who do not achieve a satisfactory improvement, presenting chronic lumbar pain with an incidence around 20 percent and due to a poor evolution of the recovery process that can cause fibrosis in the medullary canal. There are several therapeutic alternatives to address this problem, which highlights the pharmacological treatment, physical medicine and the non-surgical and surgical intervention approach recently implemented, in order to effectively reduce pain in this group of patients. However, despite the combination therapies, there is a group of patients that must undergo a new surgical intervention with little promising results.

Spinal cord stimulation for fail back surgery syndrome: literature review and clinical study / Estimulación de la médula espinal para el síndrome de cirugía de espalda fallida: revisión de la literatura y estudio clínico / Estimulação da medula espinhal para síndrome de cirurgia de retorno: revisão da literatura e estudo clínico

ABSTRACT Objective: Fail back surgery syndrome (FBSS) is a common cause of pain following spine surgery, and is associated with persistent or recurrent pain despite anatomically correct intervention. Spinal cord stimulation (SCS) is regarded as one of the most effective methods of treatment for fail back surgery syndrome. Methods: We studied 34 patients who underwent test stimulation and chronic SCS for FBSS. Results: Six months postoperatively, mean improvement by the visual analog scale (VAS) of average and maximum daily pain, and the painDETECT score, were 54.4%, 50.7% and 57.3%, respectively. This meets the criteria for effectiveness of the method, according to the literature. Most of patients reported significant improvements in life quality and less need for analgesics. Complications were seen in nine patients (26.4%) and included: intraoperative dura injury (one patient, 2.9%), wound infection (one patient, 2.9%), and electrode displacement (seven patients, 20.5%). No cases of postoperative neurological deterioration were seen. Conclusions: SCS is safe and effective for the treatment of neuropathic pain caused by FBSS. Level of Evidence IV; Case series.

RESUMO Objetivos: A síndrome da cirurgia de falência reversa (SAF) é uma causa comum de dor após cirurgia de coluna e associada a dor persistente ou recorrente, apesar da intervenção anatomicamente correta. Estimulação da medula espinhal (SCS) é considerado como um dos métodos mais eficazes de tratamento para a síndrome de cirurgia de retorno. Métodos: Foram estudados 34 pacientes submetidos a estimulação de teste e SCS crônica para FBSS. Resultados: 6 meses de pós-operatório melhora a média de dor diária média e máxima diária na escala análoga visual (VAS), bem como a pontuação do PainDetect foram de 54,4%, 50,7% e 57,3%, respectivamente. Ele atende aos critérios de eficácia do método, de acordo com a literatura. A maioria dos pacientes relatou melhora significativa da qualidade de vida e menor necessidade de analgésicos. As complicações foram observadas em nove pacientes (26,4%) e incluíram: lesão da dura-máter intraoperatória (um paciente, 2,9%), infecção da ferida (um paciente, 2,9%), deslocamento do eletrodo (sete pacientes, 20,5%). Não houve casos de deterioração neurológica no pós-operatório. Conclusões: A SCS é segura e eficaz para o tratamento da dor neuropática causada pela FBSS. Nível de Evidência IV; Séries de casos.

RESUMEN Objetivo: El síndrome de cirugía de espalda fallida (FBSS) es una razón común para el dolor después de la cirugía de la columna vertebral y se asocia con dolor persistente o recurrente a pesar de la intervención anatómicamente correcta. La estimulación de la médula espinal (SCS) se considera uno de los métodos de tratamiento más eficaces para el síndrome de cirugía de espalda fallida. Métodos: Se estudiaron 34 pacientes que se sometieron a estimulación de prueba y SCS crónica para FBSS. Resultados: A los seis meses la mejora promedio postoperatoria por la escala visual análoga (EVA) del dolor diario promedio y máximo diario, así como el puntaje de painDETECT fueron 54,4%, 50,7% y 57,3%, respectivamente. Esto cumple con los criterios de efectividad del método, según la literatura. La mayoría de los pacientes informaron una mejoría significativa de la calidad de vida y una menor necesidad de analgésicos. Las complicaciones se observaron en nueve pacientes (26,4%) e incluyeron: lesión duramadre intraoperatoria (uno paciente, 2,9%), infección de la herida (uno paciente, 2,9%), desplazamiento del electrodo (siete pacientes, 20,5%). No se observaron casos de deterioro neurológico postoperatorio. Conclusiones: SCS es seguro y efectivo para el tratamiento del dolor neuropático causado por FBSS. Nivel de Evidencia IV; Series de casos.

Effects of ozone on the pain and disability in patients with failed back surgery syndrome / Efeitos do ozônio na dor e na incapacidade em pacientes com síndrome dolorosa pós-laminectomia

Summary Introduction: Low back pain is one of the painful disorders of higher prevalence. It has several etiologies and surgery may be indicated in the presence of neurological deficits or compression syndromes. However, in up to 40% of cases, patients develop worsening of pain and failed back surgery syndrome (FBSS), which is an important cause of chronic pain with high morbidity and disability. In the last two decades, ozone has been shown to be a new therapeutic option for FBSS due to its analgesic and anti-inflammatory properties. Objective: To evaluate the effect of ozone therapy on pain and disability in patients with failed back surgery syndrome. Method: We selected 19 patients undergoing epiduroscopy and injection of ozone. Patients were evaluated preoperatively and 21 days after the procedure, using the following instruments: Visual Analogue Scale (VAS), Brief Pain Inventory, Roland-Morris Questionnaire Disability, Oswestry Disability Index (ODI), Neuropathic Pain Symptom Inventory and Douleur Neuropathique 4. Results: The patients showed significant pain relief, but no improvement was observed in the functional scales. Conclusion: Our results suggest that epidural ozone therapy can be a treatment option in FBSS to reduce the intensity of the pain.

Resumo Introdução: A dor lombar é um dos distúrbios dolorosos de maior prevalência. Tem diversas etiologias e, na presença de déficits neurológicos ou síndromes compressivas, pode ser indicada cirurgia. Entretanto, em até 40% dos casos os pacientes podem evoluir com piora da dor e síndrome dolorosa pós-laminectomia (SDPL), que se constitui em uma importante causa de dor crônica com grande morbidade e incapacidade. Nas últimas duas décadas, o ozônio tem se mostrado uma nova opção terapêutica para a SDPL em virtude das suas propriedades analgésicas e anti-inflamatórias. Objetivo: Avaliar o efeito da ozonioterapia na dor e na incapacidade de pacientes com SDPL. Método: Foram selecionados 19 pacientes, submetidos a epiduroscopia e aplicação de ozônio. Os pacientes foram avaliados no pré-operatório e 21 dias após o procedimento, por meio de Escala Visual Analógica, Inventário Breve de Dor, Questionário Roland-Morris de Incapacidade, Oswestry Disability Scale, Inventário de Sintomas de Dor Neuropática e Questionário de Dor Neuropática. Resultados: Os pacientes apresentaram redução significante nos escores das escalas de avaliação de dor; porém, essa redução não foi observada na avaliação da incapacidade funcional. Conclusão: Os dados obtidos sugerem que a ozonioterapia epidural pode ser uma opção de manejo da SDPL na diminuição da intensidade da dor.

[Profile of the patient with failed back surgery syndrome in the National Institute of Rehabilitation. Comparative analysis]. / Perfil del paciente con síndrome de columna multioperada en el Instituto Nacional de Rehabilitación. Análisis comparativo.

BACKGROUND: Failed back surgery syndrome is a complication of spine surgery that leads to chronic pain and disability, often with disastrous emotional consequences to the patient. AIM: To compare the profile of patients whose first surgery was performed in our hospital versus a group that underwent first spine surgery in a different centre. METHODS: Retrospective study with 65 patients; 18 formed group I (first spine surgery performed in our institution), and 47 patients in group II (first surgery performed in another hospital). Background, demographic, clinical features and functional status were compared. In group I the majority of the cases had a previous diagnosis of lumbar stenosis (group I 44.4% vs group II 25.5% p = 0.22), whereas disk herniation was the main diagnosis in group II (group I 22.2% vs group II 61.7% p = 0.001). The main cause of the syndrome in group I was technical error during surgery (61.1%), while in group II this cause represented only 6.3% (p=.001). Among the patients of this latter group, misdiagnosis was highly prevalent (57.4%), against no cases in group I (p=.001). The preoperative functional status between both groups and their recovery in the immediate postoperative period was similar (p = 0.68). CONCLUSIONS: This study suggests that the diagnostic and treatment standards are different between healthcare centres, specifically between academic centres vs. private practice.

Psychosocial and quality of life impact on patients with failed back surgery syndrome / Impacto psicossocial e na qualidade de vida de pacientes com síndrome dolorosa após laminectomia

BACKGROUND AND OBJECTIVES: Triggering and chronicity of failed back surgery syndrome should consider psychosocial and emotional factors which impair quality of life. This study aimed at identifying such factors and at evaluating quality of life of failed back surgery syndrome patients. METHODS: This is a descriptive, exploratory, comparative, cross-sectional study with quantitative approach. Sample was made up of a test group (I) diagnosed with failed back surgery syndrome (n=16) and a control group (II) undergoing inter-consultation in the Pain Clinic (n=15). Tools were the visual analog scale and Fischer dolorimeter. WHOQOL-Bref questionnaire was used to evaluate quality of life and Beck Anxiety Inventory and Depression Inventory were used to evaluate emotional factors anxiety and depression. RESULTS: There has been predominance of females on both groups, mean age was 42.3±5.8 (group I), most were married and mean education was 8.4±3.0 years. Mean pain duration was 0.7±0.3 months after surgery in group I with lower pain threshold. Physical dimensions and social relations were the most affected on quality of life, as well as anxiety and depression levels. CONCLUSION: Our results have shown worse pain, quality of life, anxiety and depression in group I, suggesting a better knowledge of potential postoperative complications aiming at preventing the establishment of an abnormal functionality pattern. .

JUSTIFICATIVA E OBJETIVOS: O desencadeamento e a cronificação da síndrome dolorosa pós-laminectomia deve considerar fatores psicossociais e emocionais, que comprometem a qualidade de vida. O objetivo deste estudo foi identificar esses fatores e avaliar a qualidade de vida de pacientes com síndrome dolorosa pós-laminectomia. MÉTODOS: Trata-se de um estudo descritivo, exploratório, comparativo, de corte transversal e abordagem quantitativa, com amostra de um grupo teste (I), com diagnóstico de síndrome dolorosa pós-laminectomia (n=16) e um grupo controle (II) submetido a interconsulta na Clínica da Dor (n=15). Os instrumentos foram a escala analógica visual e o dolorímetro de Fischer. Para avaliar a qualidade de vida, foi utilizado questionário WHOQOL-Bref e para os fatores emocionais ansiedade e depressão, o Inventario Beck de Ansiedade e de Depressão. RESULTADOS: Na amostra dos dois grupos houve predomínio do gênero feminino, média de idade de 42,3±5,8 anos (grupo I), maioria casada e média de escolaridade de 8,4±3,0 anos. O tempo médio de dor foi de 0,7±0,3 meses após a cirurgia no grupo I com limiar de dor mais baixo. As dimensões físicas e relações sociais foram as mais comprometidas na qualidade de vida, assim como os níveis de ansiedade e depressão. CONCLUSÃO: Esses resultados mostraram pior dor, qualidade de vida, ansiedade e depressão no grupo I, sugerindo maior conhecimento de possíveis complicações pós-operatórias buscando não permitir que se estabeleça um padrão anormal de funcionalidade. .

Functional capacity and physical activity level in failed back surgery syndrome patients

BACKGROUND AND OBJECTIVES: Failed back surgery syndrome refers to a condition in which a patient has undergone back surgery with a poor outcome. This syndrome leads to losses in daily living activities and hinders the return to physical exercise. The objective of this study was to analyze the relation between chronic low back pain and functional capacity and the physical activity level of these patients. METHODS: Cross-sectional study comprising 57 patients, mean age 51.07±12.93 years, who underwent low back surgery. These patients were divided into two groups, according to the presence of chronic low back pain. All patients filled in a questionnaire that covered demographic data, visual analog scale for pain, Rolland-Morris Questionnaire to evaluate functional incapacity and International Physical Activity Questionnaire to measure physical activity level. RESULTS: The following predominated: women (77%), obese (49%), surgery for spinal disc herniation (80%), underwent one low back surgery (52%). Patients with chronic low back pain refer a greater perception of disability and 81% of this group showed an average of 3.53±3.51 points in Roland-Morris. Chronic low back pain had no influence on the different levels of physical activity demonstrated in patients with chronic low back pain and results of the International Physical Activity Questionnaire showed no significant difference between the groups (p=0.54). CONCLUSION: These findings indicate that there were other factors beyond chronic pain interfering with the physical activity level in these groups and further studies to explore lifestyle, physical exercise adherence and other dimensions of pain are still needed. Results contribute to the understanding and management of patients with chronic low back pain. .

Effects of ozone applied by spinal endoscopy in patients with chronic pain related to failed back surgery syndrome: a pilot study.

INTRODUCTION: In the last two decades, ozone has emerged as a treatment for low back pain, applied by means of minimally invasive techniques. OBJECTIVE: The aim of this study is to assess the effect and safety of ozone therapy applied in the epidural space for chronic pain related to failed back surgery syndrome. METHODS: The investigators studied 13 sequential patients of both sexes, between 18 and 70 years old, with persistent chronic pain (more than six months) in the lumbar region and in the lower limbs related to failed back surgery syndrome (FBSS). Pain was classified as neuropathic and non-neuropathic regarding the topography (lumbar and lower limb), based on the DN4 (Douleur Neuropathique 4) questionnaire. The patients received the ozone gas in the lumbar epidural space via spinal-sacral endoscopy. Clinical evaluation was performed before, immediately after (24 hours), and 1, 3, and 6 months after intervention with visual analog scale and Oswestry Disability Index (ODI). RESULTS: Overall, the patients had 43.7% reduction of lumbar pain, 60.9% reduction in leg pain in six months followed by 44.0% of improvement in ODI. The reduction of pain and in the disability index was markedly greater in patients with non-neuropathic predominant pain, 95.2%, 80.6%, and 75.3% improvement in lumbar, leg pain, and ODI respectively, while neuropathic predominant pain patients experienced only 12.5%, 42.4%, and 20.9% improvement, also respectively. No neurological or infectious complications were observed acutely or during the follow-up. The present data suggests that epidural ozone might be a therapeutic option for persistent low back pain, especially in non-neuropathic predominant pain patients, but double-blind controlled studies are still required to prove its efficacy.

Uso de Adcon L gel® y pronóstico clínico en patología quirúrgica lumbar / Use of Adcon L and clinical outcome in surgical lumbar pathology

Objetivo: La fibrosis peridural postquirúrgica es uno de los principales factores causantes del síndrome de columna fallida, para lo cual se ha encontrado un gel bioreabsorbible que actúa como preventivo de la formación de fibrosis. El objetivo del trabajo es evaluar clínica y radiológicamente el pronóstico de los pacientes sometidos a cirugía lumbar que recibieron Adcon L gel. Material y Método: Pacientes sometidos a cirugía lumbar primaria o secundaria por discopatía, estenosis, o fibrosis entre enero 2007 y julio 2009, recibiendo Adcon L gel, fueron incluidos en el trabajo. De 71 pacientes, solo 65 acudieron a sus controles para seguimiento. Resultados: El 98.4% de pacientes sometidos a cirugía primaria y el 66.6% de los sometidos a cirugía secundaria tuvo evolución favorable. En la resonancia magnética de control, los 65 pacientes estudiados presentaron tuvo ninguna o escasa fibrosis peridural. Conclusión: El Adcon L gel es un instrumento eficaz en la prevención de fibrosis peridural y en el pronóstico clínico de pacientes intervenidos por patología quirúrgica lumbar.

Postoperative peridural fibrosis is considered a major causative factor of Failed Back syndrome, and a bioresorbable gel was found to prevent the formation of postoperative scar. The aim of this work is to evaluate the clinic and radiologic outcome of patients underwent lumbar surgery who received Adcon L gel. Patients treated surgically for lumbar discopathy, stenosis, or fibrosis between January, 2007 and July, 2009, were included in this study, receiving Adcon L gel. Of 71 patients, only 65 had a 6 month follow-up. 98.4 % of patients submitted to first surgery and 66.6 % of the submitted ones to second surgery had good outcome. All 65 studied patients had none or minimal peridural scar in MRI controls. The ADCON L gel is an effective instrument to prevent peridural scar and to have a good clinical outcome in patients in whom lumbar surgery was performed.

Dorsal column stimulator applications.

BACKGROUND: Spinal cord stimulation (SCS) has been used to treat neuropathic pain since 1967. Following that, technological progress, among other advances, helped SCS become an effective tool to reduce pain. METHODS: This article is a non-systematic review of the mechanism of action, indications, results, programming parameters, complications, and cost-effectiveness of SCS. RESULTS: In spite of the existence of several studies that try to prove the mechanism of action of SCS, it still remains unknown. The mechanism of action of SCS would be based on the antidromic activation of the dorsal column fibers, which activate the inhibitory interneurons within the dorsal horn. At present, the indications of SCS are being revised constantly, while new applications are being proposed and researched worldwide. Failed back surgery syndrome (FBSS) is the most common indication for SCS, whereas, the complex regional pain syndrome (CRPS) is the second one. Also, this technique is useful in patients with refractory angina and critical limb ischemia, in whom surgical or endovascular treatment cannot be performed. Further indications may be phantom limb pain, chronic intractable pain located in the head, face, neck, or upper extremities, spinal lumbar stenosis in patients who are not surgical candidates, and others. CONCLUSION: Spinal cord stimulation is a useful tool for neuromodulation, if an accurate patient selection is carried out prior, which should include a trial period. Undoubtedly, this proper selection and a better knowledge of its underlying mechanisms of action, will allow this cutting edge technique to be more acceptable among pain physicians.

The application of percutaneous lysis of epidural adhesions in patients with failed back surgery syndrome / A aplicação da lise percutânea de aderências epidurais em pacientes com síndrome pós-laminectomia

PURPOSE: To investigate the efficacy and the feasibility of application of percutaneous lysis of epidural adhesions in failed back surgery syndrome (FBSS) using a stiff type guide wire and 4F vascular catheter. METHODS: Ninety two patients with FBSS were randomly divided into two groups, the control group (treated by injection dexamethasone only) and percutaneous lysis of epidural adhesions group. Visual analog scale scores (VAS) and therapeutic evaluation were observed in the preoperative, seven days postoperative, one month and six months postoperative. RESULTS: VAS scores for pain were significantly reduced in both groups at seven days. The VAS scores were in controlled group at one month, six months was significantly higher than that in epidural lysis group. However, there was no statistical difference in VAS scores of one month and six months when respectively compared to that of before operation in controlled group. Patients on epidural lysis reported clinical effectiveness rate was 50%. Patients on control was 5.26%, there was a statistical difference between two groups. CONCLUSION: Percutaneous lysis of epidural adhesions by using a stiff type guide wire and 4F vascular catheter is an effective method in the treatment of FBSS and it has a value in clinical application.

OBJETIVO: Investigar a eficácia e a exequibilidade da aplicação da lise percutânea de aderências epidurais na síndrome pós-laminectomia usando um fio-guia tipo Stiff e um cateter vascular 4F. MÉTODOS: Noventa e dois pacientes com síndrome pós-laminectomia foram randomizados em dois grupos: grupo controle (tratado somente com injeção de dexametazona) e grupo lise percutânea de aderências epidurais. Escores de escala visual analógica (VAS) e avaliação terapêutica foram observadas no pré-operatório, no sétimo dia de pós-operatório, um mês e seis meses de pós-operatório. RESULTADOS: Escores VAS para dor foram significantemente reduzidos em ambos os grupos aos sete dias. Os escores VAS foram mais altos no grupo controle comparado ao da lise epidural nos tempos de um mês e seis meses. Entretanto, não há diferença estatística nos escores VAS de um mês e seis meses quando comparados, respectivamente, àqueles de antes da operação do grupo controle. Pacientes com a lise epidural relataram taxa de eficiência de 50%. Nos pacientes do grupo controle foi 5,26%, havendo diferença estatística entre os dois grupos. CONCLUSÃO: A lise percutânea de aderências epidemias usando um fio-guia tipo Stiff e um cateter vascular 4F mostrou-se um método efetivo no tratamento de FBSS e tem valor na aplicação clínica.

The application of percutaneous lysis of epidural adhesions in patients with failed back surgery syndrome / A aplicação da lise percutânea de aderências epidurais em pacientes com síndrome pós-laminectomia

PURPOSE: To investigate the efficacy and the feasibility of application of percutaneous lysis of epidural adhesions in failed back surgery syndrome (FBSS) using a stiff type guide wire and 4F vascular catheter. METHODS: Ninety two patients with FBSS were randomly divided into two groups, the control group (treated by injection dexamethasone only) and percutaneous lysis of epidural adhesions group. Visual analog scale scores (VAS) and therapeutic evaluation were observed in the preoperative, seven days postoperative, one month and six months postoperative. RESULTS: VAS scores for pain were significantly reduced in both groups at seven days. The VAS scores were in controlled group at one month, six months was significantly higher than that in epidural lysis group. However, there was no statistical difference in VAS scores of one month and six months when respectively compared to that of before operation in controlled group. Patients on epidural lysis reported clinical effectiveness rate was 50%. Patients on control was 5.26%, there was a statistical difference between two groups. CONCLUSION: Percutaneous lysis of epidural adhesions by using a stiff type guide wire and 4F vascular catheter is an effective method in the treatment of FBSS and it has a value in clinical application.(AU)

OBJETIVO: Investigar a eficácia e a exequibilidade da aplicação da lise percutânea de aderências epidurais na síndrome pós-laminectomia usando um fio-guia tipo Stiff e um cateter vascular 4F. MÉTODOS: Noventa e dois pacientes com síndrome pós-laminectomia foram randomizados em dois grupos: grupo controle (tratado somente com injeção de dexametazona) e grupo lise percutânea de aderências epidurais. Escores de escala visual analógica (VAS) e avaliação terapêutica foram observadas no pré-operatório, no sétimo dia de pós-operatório, um mês e seis meses de pós-operatório. RESULTADOS: Escores VAS para dor foram significantemente reduzidos em ambos os grupos aos sete dias. Os escores VAS foram mais altos no grupo controle comparado ao da lise epidural nos tempos de um mês e seis meses. Entretanto, não há diferença estatística nos escores VAS de um mês e seis meses quando comparados, respectivamente, àqueles de antes da operação do grupo controle. Pacientes com a lise epidural relataram taxa de eficiência de 50%. Nos pacientes do grupo controle foi 5,26%, havendo diferença estatística entre os dois grupos. CONCLUSÃO: A lise percutânea de aderências epidemias usando um fio-guia tipo Stiff e um cateter vascular 4F mostrou-se um método efetivo no tratamento de FBSS e tem valor na aplicação clínica.(AU)

Resonancia magnética nuclear en el postoperatorio de discectomía lumbar en pacientes asintomáticos y con síndrome de cirugía lumbar fallida / Ressonância nuclear magnética no pós-operatório da discectomia lombar em pacientes assintomáticos e com síndrome de cirurgia lombar falida / Nuclear magnetic resonance in postoperative lumbar discectomy in asymptomatic patients and with failed back surgery syndrome

OBJETIVO: analizar los cambios posquirúrgicos en pacientes sometidos a discectomía lumbar, tanto en pacientes cuya evolución ha sido satisfactoria, como en aquellos con "Síndrome de Cirugía Lumbar Fallida", enfatizando el justo valor que la resonancia magnética nuclear tiene. MÉTODOS: el universo de trabajo está constituido por dos grupos: Grupo I, cinco pacientes con evolución satisfactoria, asintomáticos; y Grupo II con diez pacientes con resultados considerados no satisfactorios y/o Síndrome Fallido Lumbar. Se analizaron los resultados obtenidos en la imagen de resonancia magnética nuclear, emitiendo un diagnóstico con evaluación externa sin conocimiento del estado clínico de los pacientes. También se realizó la correlación con el estado clínico en ambos los grupos. RESULTADOS: las manifestaciones clínicas preoperatorias tuvieron una distribución muy similar. En ninguno de los dos grupos se reportaron complicaciones transoperatórias. En todos se estudió por histopatología y se reportó disco degenerado o hialinizado. En el Grupo I, no se encontró imagen de alguna anomalía a pesar de su estado clínico. En todos los pacientes se encontraron datos de fibrosis posquirúrgica; en cuatro casos, disco residual con compresión radicular en los cinco pacientes. En el Grupo II, sólo en ocho pacientes, la resonancia magnética nuclear demostró algún hallazgo anormal. Los hallazgos anormales fueron: fibrosis posquirúrgica en cinco casos (50 por ciento), disco residual en tres casos (30 por ciento) y datos de compresión radicular en seis de los casos (60 por ciento). CONCLUSIÓN: no hay congruencia entre los hallazgos de resonancia magnética nuclear y la clínica, en pacientes postoperados de discectomía lumbar con evolución satisfactoria, hasta el momento, asintomáticos. La resonancia magnética nuclear no es confiable en estos pacientes.

OBJETIVO: analisar as mudanças pós-cirúrgicas nos pacientes submetidos à discectomia lombar em pacientes com evolução satisfatória, assim como naqueles com "Síndrome de Cirurgia Falida", dando ênfase ao justo valor que a ressonância nuclear magnética tem. MÉTODOS: o universo do trabalho esta constituído por dois grupos, Grupo I com cinco pacientes com evolução satisfatória, assintomáticos. O Grupo II possui dez pacientes com resultados considerados não-satisfatórios e/ou "Síndrome Falida Lombar". Analisaram-se os resultados obtidos na imagem da ressonância nuclear magnética, emitindo um diagnóstico com avaliação externa sem conhecimento do estado clínico dos pacientes, e realizou-se uma correlação com o estado clínico de ambos os grupos. RESULTADOS: as manifestações clínicas pré-operatórias tiveram uma distribuição muito similar. Em nenhum dos grupos se reportaram complicações transoperatórias. Em todos os grupos, foi feito o estudo histopatológico e foi informado o disco degenerado ou hialinizado. No Grupo I, não foi encontrada imagem de alguma anomalia apesar de seu estado clínico. Em todos os pacientes foram encontrados dados de fibroses pós-cirúrgica, em quatro casos, disco residual, com compressão radicular nos cinco pacientes. No Grupo II, só foi possível encontrar em oito pacientes, e a ressonância nuclear magnética demonstrou algum achado anormal, os quais foram fibroses pós-cirúrgica, em cinco casos (50 por cento); disco residual, em três casos (30 por cento); e dados de compressão radicular, em seis casos (60 por cento). CONCLUSÃO: não há congruência entre os achados da ressonância nuclear magnética e a clínica em pacientes pós-operatórios da discectomia lombar com evolução satisfatória, até o momento, assintomáticos. A ressonância nuclear magnética não é confiável nestes pacientes.

OBJECTIVE: to analyze the postoperative changes in patients undergoing lumbar discectomy, both in patients whose evolution has been satisfactory, as in those with "Failed lumbar Surgery Syndrome", emphasizing the fair value that the nuclear magnetic resonance has. METHODS: the work environment consists of two groups: Group I, five patients with satisfactory evolution and asymptomatic. Group II is composed of ten patients with unsatisfactory results and/or Failed Lumbar Syndrome. The results obtained in the nuclear magnetic resonance image were analyzed, emitting a diagnosis with external evaluation without knowledge of the clinical status of patients, and a correlation with clinical status in both groups was performed. RESULTS: the clinical preoperative manifestations had a very similar distribution. Transoperatory complications were not reported in any of the two groups. In all the groups, the histopathology study was carried out and it was reported the disk degenerated or hyalinization. In Group I, it was not found any abnormality, despite its clinical state. In all the patients, postoperative fibrosis data was found in four cases, and residual disk root was compressed in five patients. In Group II, only in eight patients, the nuclear magnetic resonance showed abnormal findings. The abnormal findings were: fibrosis postoperative in five cases (50 percent), residual disk in three cases (30 percent), and data root compression in six cases (60 percent). CONCLUSION: there is no congruence between the nuclear magnetic resonance and clinic findings, in postoperative patients, of lumbar disectomy with a satisfactory development, who, so far, are asymptomatic. The nuclear magnetic resonance is not reliable in these patients.