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| WANG Yang,WU Han,ZHANG Ziyan.The distance between paraspinal intermuscular cleavage and midline in the lumbar spine and its significance, an MRI study[J].Chinese Journal of Spine and Spinal Cord,2013,(4):316-319. |
| The distance between paraspinal intermuscular cleavage and midline in the lumbar spine and its significance, an MRI study |
| Received:April 15, 2012 Revised:January 27, 2013 |
| English Keywords:Multifidus and longissimus muscles Intermuscular cleavage planes Paraspinal approach MRI |
| Fund:国家自然科学基金资助项目（编号：30772209） |
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| English Abstract: |
| 【Abstract】 Objectives: To measure the distances between the midline and the intermuscular planes formed by the multifidus and longissimus muscles at each lumbar level(L1-S1) and discuss the distance distribution in Chinese. Methods: Two hundred patients(100 males and 100 females) suffering from low back pain and with lumbar MRI records were selected randomly in our hospital from January 2010 to December 2010. The distance from the convexest point outside the multifidus muscles to the midline at each level between L1 and S1 was measured in MRI scans. The distance distribution at each level was determined by using the statistical methods(such as frequency analysis, t test). The correlation between sex and the measured outcomes was identified. Results: The statistical result showed normal distribution at each level(L1/2, L2/3, L3/4, L4/5, L5/S1). There was no sex-related statistical significance(P>0.05). Overall mean value between the midline and the paraspinal intermuscular planes at disc level from L1/2 to L5/S1 was 16.17±1.87mm, 19.91±2.38mm, 24.97±2.96mm, 29.85±3.45mm, 33.56±3.97mm, respectively. Mean measurement was significantly different between intermuscular cleavage planes and the midline at each lumbar disc level(P<0.05). Conclusions: The distances between the lumbar intermuscular planes and midline in Chinese gradually decrease from L5/S1 to L1/2. No significant correlations exist between males and females. Preoperative measurements in MRI scans provide valuable reference to determine the precise incision in Wiltse′s paraspinal surgical approach. |
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