中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (9): 1405-1409.doi: 10.3969/j.issn.2095-4344.2470

• 骨与关节图像与影像 bone and joint imaging • 上一篇    下一篇

髋关节置换髋臼相关参数在CT水平面与CT真骨盆平面上的差异

邓必勇,邓必祥   

  1. 贵州省骨科医院骨外科,贵州省贵阳市  550002
  • 收稿日期:2019-06-26 修回日期:2019-07-17 接受日期:2019-08-19 出版日期:2020-03-28 发布日期:2020-02-13
  • 通讯作者: 邓必祥,医师,贵州省骨科医院骨外科,贵州省贵阳市 550002
  • 作者简介:邓必勇,副主任医师。
  • 基金资助:
    贵州省科技计划项目(黔科合[2017]1093)

Differences in relative parameters of acetabulum in hip arthroplasty between CT horizontal plane and CT true pelvic plane

Deng Biyong, Deng Bixiang   

  1. Department of Orthopedics, Guizhou Province Osteological Hospital, Guiyang 550002, Guizhou Province, China
  • Received:2019-06-26 Revised:2019-07-17 Accepted:2019-08-19 Online:2020-03-28 Published:2020-02-13
  • Contact: Deng Bixiang, Physician, Department of Orthopedics, Guizhou Province Osteological Hospital, Guiyang 550002, Guizhou Province, China
  • About author:Deng Biyong, Associate chief physician, Department of Orthopedics, Guizhou Province Osteological Hospital, Guiyang 550002, Guizhou Province, China
  • Supported by:
    the Science and Technology Program of Guizhou Province, No. [2017]1093

摘要:

文题释义:
髋臼假体放置位置:全髋关节置换术中,髋臼假体放置是否准确对患者术后髋关节功能、使用寿命以及稳定性有直接影响,若是臼杯位置不合理,极易导致髋关节撞击、假体脱位、加速磨损以及活动受限等一系列不良状况发生。
髋臼CT三维参数测量:因X射线平片对骨结构重建缺乏三维信息,所以应用受限,可将其用于诊断髋臼发育不良,但不适用于明确及精确量化髋臼发育异常位置及程度;而髋臼CT三维参数测量在评估髋臼发育异常位置及程度方面具有显著效果,对于髋臼重建的术前髋臼假体选择有重要指导作用,且基于CT图像进行测量,可反映关节置换相关髋臼参数,确保术中假体合理安放。

背景:全髋关节置换过程中髋臼假体放置是否准确对患者术后髋关节功能、稳定性及使用寿命有直接影响,臼杯位置安放不合理可能导致不良事件发生,因此应重视CT影像学检查。

目的:分析CT 图像以水平面和真骨盆平面作为参照的髋关节置换髋臼相关参数的差异,明确其对治疗效果可能产生的影响。

方法:选择72例患盆腔软组织疾病但髋关节正常者作为观察对象,所有患者对测量方案均知情同意,且得到医院伦理委员会批准。于自然平卧位下基于垂直水平面予以CT扫描,通过CT定位片及其扫描图像对双侧髋臼的前倾角、髋臼角、髋臼深度、髋臼宽度、股骨头中点-髋臼边缘角、外展角予以测量,同时对真骨盆平面与水平面间的夹角予以测量。选取CT软件予以三维重建,再次于真骨盆平面垂直予以扫描,采用相同方式对上述参数予以测量。左右侧髋臼及2个平面下参数的差异采用配对t 检验进行比较,对2个参考平面的夹角与所测量参数的差值予以Spearman相关性分析。

结果与结论:①水平面与真骨盆平面上的左右侧髋臼参数值差异无显著性意义(P > 0.05);②骨盆倾斜角度与两参照面间股骨头中点-髋臼边缘角、髋臼前倾角差值呈正相关,与髋臼角、髋臼深度呈负相关;③提示平卧位CT扫描过程中,骨盆伴有旋转状况,以真骨盆平面作为参考的参数与直接测量得到的髋臼参数有误差,因此全髋关节置换前制定髋臼假体放置方案时应引起重视。

ORCID: 0000-0003-4365-0807(邓必勇)

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


关键词: 髋臼, 髋关节, CT, 真骨盆平面, 成像

Abstract:

BACKGROUND: The accuracy of acetabular prosthesis placement during total hip arthroplasty has a direct effect on postoperative hip function, stability and service life. Unreasonable placement of the cup may lead to adverse events, so CT imaging should be emphasized.

OBJECTIVE: To analyze the differences of acetabular parameters in hip arthroplasty between the horizontal and true pelvic planes on CT images, and to determine the possible impact on surgery outcomes.

METHODS: Seventy-two cases of pelvic soft tissue disease were selected. All patients signed the informed consents, and the study was approved by the hospital ethics committee. The anteversion angle, acetabular angle, acetabular depth, acetabular width, femoral head midpoint-acetabular margin angle, abduction angle between the true pelvic plane and the horizontal plane were measured by CT positioning film and its scanning image. CT software was selected to reconstruct the three-dimensional image, and then scanned vertically with the true pelvic plane. The above parameters were measured in the same way. The differences of parameters between left and right acetabulum and two planes were compared by paired t test. Spearman correlation analysis was used to analyze the correlation between the angles between the two reference planes and the difference between the measured parameters. 

RESULTS AND CONCLUSION: (1) There was no significant difference in the values of the left and right acetabular parameters between the horizontal plane and the true pelvic plane (P > 0.05). (2) The pelvic tilt angle was positively correlated with the femoral head midpoint-acetabular margin angle and the acetabular anteversion angle between the two reference surfaces, and negatively correlated with the acetabular angle and acetabular depth. (3) Our results suggest that during the CT scan of the supine position, the pelvis is accompanied by a rotation condition. The parameters of the true pelvis plane as a reference are inaccurate with the directly measured acetabular parameters. Therefore, attention should be paid to the preparation of the surgical plan before surgery.

Key words: acetabulum, hip joint, CT, true pelvic plane, imaging

中图分类号: