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Inicio Radiología (English Edition) Evaluation of the postoperative lumbar spine
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Vol. 55. Issue 1.
Pages 12-23 (January - February 2013)
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Vol. 55. Issue 1.
Pages 12-23 (January - February 2013)
Update in Radiology
Evaluation of the postoperative lumbar spine
Evaluación de la columna lumbar posquirúrgica
Visits
20756
I. Herrera Herrera
Corresponding author
isabel.herherrera@gmail.com

Corresponding author.
, R. Moreno de la Presa, R. González Gutiérrez, E. Bárcena Ruiz, J.M. García Benassi
Servicio de Radiodiagnóstico, Hospital Virgen de la Salud, Toledo, Spain
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Table 1. CT acquisition parameters in patients with metal orthopedic hardware.
Table 2. Causes of failed surgery.
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Abstract

Given the prevalence of low back pain, surgical interventions on the lumbar spine are becoming more common. Among the many surgical procedures available for these interventions, the most common are laminectomy and discectomy. In 10–40% of patients who undergo surgical interventions on the lumbar spine, low back pain is not completely alleviated or it recurs, and these cases fall into the category of “failed back surgery syndrome”. This syndrome can have many different causes and multiple factors are often involved. It is important not to confuse the normal postoperative findings with those specific to failed back surgery syndrome. Deciding which imaging technique to use will depend on the type of surgical intervention, whether metallic orthopedic material was used, and the clinical suspicion. It is essential to know the advantages and limitations of the available imaging techniques to ensure the optimal evaluation of these patients, especially after interventions carried out with instrumentation to minimize the artifacts due to these materials.

Keywords:
Magnetic resonance imaging
Lumbar spine
Postoperative lumbar spine
Failed back surgery syndrome
Resumen

Dada la gran prevalencia del dolor lumbar, la cirugía de columna es una intervención cada vez más frecuente. Existen múltiples procedimientos quirúrgicos disponibles, siendo la laminectomía y discectomía las intervenciones más frecuentes. En un 10-40% de los pacientes intervenidos, el dolor lumbar que ocasionó la intervención puede recurrir o no solucionarse completamente, incluyéndose dentro del síndrome de cirugía fallida de columna. Hay múltiples causas que pueden ocasionar este síndrome, siendo frecuentemente de etiología multifactorial y no deben confundirse con los hallazgos normales en columnas postoperadas. La decisión de la técnica de imagen a realizar dependerá del tipo de cirugía, la utilización de material ortopédico metálico y la sospecha clínica. El conocimiento de las ventajas y limitaciones de las distintas técnicas de imagen disponibles es esencial para la óptima valoración de estos pacientes, especialmente tras cirugías con instrumentación donde serán necesarios ajustes técnicos para minimizar el artefacto producido por estos materiales.

Palabras clave:
Imagen por resonancia magnética
Columna lumbar
Columna lumbar postoperada
Síndrome de cirugía fallida de columna

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