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学科主题: 临床医学
题名:
Accurate determination of isthmus of lumbar pedicle: A morphometric study using reformatted computed tomographic images
作者: Li, B; Jiang, BG; Fu, ZG; Zhang, DY; Wang, TB
关键词: lumbar vertebrae ; pedicle ; isthmus ; morphology ; reformatted CT
刊名: SPINE
发表日期: 2004-11-01
卷: 29, 期:21, 页:2438-2444
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Clinical Neurology ; Orthopedics
研究领域[WOS]: Neurosciences & Neurology ; Orthopedics
关键词[WOS]: SCREW FIXATION ; VERTEBRAE ; SPINE ; POLYMETHYLMETHACRYLATE ; PLACEMENT
英文摘要:

Study Design. Lumbar pedicle isthmus, the narrowest section of pedicle, was investigated.

Objective. To determine the lumbar pedicle isthmus accurately and measure related parameters.

Summary of Background Data. Accurate anatomic knowledge of pedicle parameters is critical for a successful transpedicular procedure. Many studies on lumbar pedicle dimensions have been conducted, yet less is known about how to obtain these data and their veracity. In fact, the narrowest section is present in the pedicle, i.e., the isthmus of the pedicle. This is the bottleneck of the pedicle; to determine and measure it could illustrate the true morphologic characteristics of the lumbar pedicle.

Methods. Ultra high-speed spiral CT scan of lumbar spine was performed in 41 patients of Chinese origin. After reformation of the original images, isthmus and transverse plane of pedicle axis were determined. Eleven dimensions of isthmus plane and three dimensions of transverse plane were calculated using software.

Results. Pedicle endosteal width and height in female patients who were over the age of 50 were greater than those of female patients younger than 50 years old. The isthmus endosteal width from L1 to L5 was 5.2, 6.0, 7.5, 7.5, and 8.7 mm and 4.0, 4.1, 5.4, 5.7, and 7.1 mm, respectively, in men and women. Isthmus inclination inclined to midline with less than 10 above L3 but increased in L4 and 30 in L5.

Conclusions. An objective narrowest section, the pedicle isthmus, exists in lumbar pedicle axis. The parameters of isthmus, especially isthmus endosteal width, show the morphologic characteristics of the lumbar pedicle and are the most important data provided for transpedicular procedures. The small pedicles of female patients over the age of 50 also show certain primary osteoporosis. Isthmus inclination puts the pedicle in a more complicated space position. A better understanding of the complicated structure of the pedicle isthmus guarantees success in transpedicular procedures.

语种: 英语
WOS记录号: WOS:000224870200016
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/52414
Appears in Collections:北京大学第二临床医学院_期刊论文

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作者单位: Peking Univ, Peoples Hosp, Dept Trauma & Orthoped, Beijing 100044, Peoples R China

Recommended Citation:
Li, B,Jiang, BG,Fu, ZG,et al. Accurate determination of isthmus of lumbar pedicle: A morphometric study using reformatted computed tomographic images[J]. SPINE,2004,29(21):2438-2444.
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