Dynamic Change of Dural Sac Cross-Sectional Area in Axial Loaded Magnetic Resonance Imaging Correlates With the Severity of Clinical Symptoms in Patients With Lumbar Spinal Canal Stenosis

• DOI: 10.1097/brs.0b013e3182134e73
• Publication Date: 2011-02-08T06:08:42Z
• Authors: Haruo Kanno; Hiroshi Ozawa; Yutaka Koizumi; Naoki Morozumi; Toshimi Aizawa; Takashi Kusakabe; Yushin Ishii; Eiji Itoi
• Keywords: Male; Lumbar Vertebrae; Middle Aged; Magnetic Resonance Imaging; Severity of Illness Index; Cohort Studies; Weight-Bearing; 03 medical and health sciences; Spinal Stenosis; 0302 clinical medicine; Humans; Female; Dura Mater; Registries; Spinal Canal; Aged

In Brief Study Design. Cross-sectional registry and imaging cohort study. Objective. To examine whether the dural sac cross-sectional area (DCSA) in axial loaded magnetic resonance (MRI) correlates with severity of clinical symptoms patients lumbar spinal canal stenosis (LSCS). Summary Background Data. Many studies have analyzed relationship between DCSA on conventional MRI LSCS, but link is still uncertain. Recently, MRI, which can stimulate upright position, has been developed. Axial demonstrates significant reduction provides valuable radiologic findings assessment LSCS. However, there no study correlation Methods. 88 changes were determined at single most constricted intervertebral level. The was evaluated basis duration symptoms, walking distance, visual analogue scale leg pain/numbness, Japanese Orthopaedic Association score. Spearman correlations analyzed. addition, compared, respectively, without (>15 mm2) DCSA. Results. had good distance score (rs = 0.46 0.45, respectively; P < 0.001). change significantly correlated to numbness, 0.59, 0.44, 0.54, Furthermore, worse more than 15 mm2 (P not showed a smaller 0.05). Conclusion. symptoms. demonstrated that could detect. Thus, loading information for assessing stenosis, although did any satisfactory correlations. beneficial stenosis.