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Survival Rates and Risk Factors for Cephalad and L5-S1 Adjacent Segment Degeneration after L5 Floating Lumbar Fusion : A Minimum 2-Year Follow-Up
Journal of Korean Neurosurgical Society ; : 108-113, 2015.
Artículo en Inglés | WPRIM | ID: wpr-190404
ABSTRACT

OBJECTIVE:

Although the L5-S1 has distinct structural features in comparison with other lumbar spine segments, not much is known about adjacent segment degeneration (ASD) at the L5-S1 segment. The aim of study was to compare the incidence and character of ASD of the cephalad and L5-S1 segments after L5 floating lumbar fusion.

METHODS:

From 2005 to 2010, 115 patients who underwent L5 floating lumber fusion were investigated. The mean follow-up period was 46.1 months. The incidence of radiological and clinical ASD of the cephalad and the L5-S1 segments was compared using survival analysis. Risk factors affecting ASD were analyzed using a log rank test and the Cox proportional hazard model.

RESULTS:

Radiological ASD of the L5-S1 segment had a statistically significant higher survival rate than that of the cephalad segment (p=0.001). However, clinical ASD of the L5-S1 segment was significantly lower survival rates than that of the cephalad segment (p=0.038). Risk factor analysis showed that disc degeneration of the cephalad segment and preoperative spinal stenosis of the L5-S1 segment were risk factors.

CONCLUSION:

In L5 floating fusion, radiological ASD was more common in the cephalad segment and clinical ASD was more common in the L5-S1 segment. At the L5-S1 segment, the degree of spinal stenosis appears to be the most influential risk factor in ASD incidences, unlike the cephalad segment.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Estenosis Espinal / Columna Vertebral / Modelos de Riesgos Proporcionales / Incidencia / Tasa de Supervivencia / Factores de Riesgo / Estudios de Seguimiento / Degeneración del Disco Intervertebral Tipo de estudio: Estudio de etiología / Estudio de incidencia / Estudio observacional / Estudio pronóstico / Factores de riesgo Límite: Humanos Idioma: Inglés Revista: Journal of Korean Neurosurgical Society Año: 2015 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Estenosis Espinal / Columna Vertebral / Modelos de Riesgos Proporcionales / Incidencia / Tasa de Supervivencia / Factores de Riesgo / Estudios de Seguimiento / Degeneración del Disco Intervertebral Tipo de estudio: Estudio de etiología / Estudio de incidencia / Estudio observacional / Estudio pronóstico / Factores de riesgo Límite: Humanos Idioma: Inglés Revista: Journal of Korean Neurosurgical Society Año: 2015 Tipo del documento: Artículo