摘要
目的探讨CT和X线片对髋臼骨折移位程度的评价。方法回顾性分析我院1998年1月～2003年5月收治的64例髋臼骨折患者的CT和X线片。根据病例纳入标准,把其中20例患者的CT和X线片作为研究对象。应用单盲法,在CT和X线片上,让3名医生各自利用一个标准的测量方法对沿髋臼关节面的横行和垂直移位进行测量。以CT为标准,分别计算出横行和垂直移位2mm和4mm的X线片的灵敏度和特异度,同时对每个测量者和测量者之间的测量可靠性进行评价。结果X线片对检测垂直移位的灵敏度较差(灵敏度=44.3%)。其中对于单柱骨折垂直移位的灵敏度更差(灵敏度=0)。每个测量者和测量者之间的测量值具有较好的一致性。结论X线片对检测髋臼骨折横向和垂直移位均显示较差的灵敏度;而对垂直移位的灵敏度就更差;因此,CT不仅优于X线片用于术前选择髋臼骨折患者的诊断和治疗方法,而且还用于评价术后骨折复位程度和预后。
Objectives To evaluate plain radiographs and computed tomography (CT) scans in respect of assessment of articular fragment displacements (step and gap) in displaced acetabular fractures. Methods A retrospective evaluation was done to analyze the CT scans and plain radiographs of 64 patients who had been treated for displaced acetabular fractures in our hospital from January 1998 to May 2003. Of them, 20 met the inclusion criteria. In a blind method, 3 independent reviewers measured step and gap deformities on plain radiographs and CT scans utilizing a standardized measurement technique. The sensitivity and specificity of plain radiographs in detecting step and gap displacements (2 mm and 4 mm) in comparison of those of CT scans were determined. Moreover, intraclass correlation coefficient and intraobserver reliability were also calculated. Results Compared with CT, plain radiographs showed poor sensitivity in detecting step deformity (sensitivity = 44.3%). As far as fracture type was concerned, plain radiographs were particularly poor at detecting step deformity in fractures involving a single column of the acetabulum (sensitivity = 0%). Excellent intraobserver and intraclass reliability existed among the 3 reviewers. Conclusions Compared with CT scans, plain radiographs are poorly sensitive in detection of step and gap deformities in patients with acetabular fractures, and particularly poor at detecting step deformities. Therefore, in treatment of displaced acetabular fractures, CT scans are essential and should not only be used together with plain radiographs in the preoperative evaluation but also be considered in the postoperative assessment of fracture reduction and predicting future outcomes.
出处
《中华创伤骨科杂志》
CAS
CSCD
2004年第8期851-854,共4页
Chinese Journal of Orthopaedic Trauma
