膝关节屈曲时腘动脉移位的MRI研究
磁共振成像,,移位；,腘动脉；,膝；,磁共振成像,1材料和方法,2结果,3讨论,参考文献：
摘 要：[目的]阐明膝关节屈曲时胫骨后方腘动脉(PA)位置的变化。[方法]应用MR检查，分别在关节0°伸直位和90°屈曲位对16个膝进行扫描，在胫骨的两个水平，相当于全膝关节置换术(TKR)和胫骨高位截骨术(HTO)的截骨水平，测量腘动脉到胫骨后方皮质的距离(骨—动脉距离，BAD)，用配对t检验比较距离的变化。[结果]从伸直位到屈曲90°位，在TKR水平，BAD平均增加18 mm(-2～+5 mm)，改变有统计学意义(P=0005)；在HTO水平，BAD平均增加14 mm(-2～+4 mm)，改变也有统计学意义(P=0005)。但在两个水平，各有2例表现为腘动脉的前移。[结论]屈曲膝关节是一个相对安全的体位，但在膝部手术中，并不能保证规避损伤腘动脉的潜在危险。关键词：移位； 腘动脉； 膝； 磁共振成像
MRI study of the movement of popliteal artery during knee flexion∥GENG Xiaopeng, CHEN Baicheng, WANG Xia, et al. Department of Joint Surgery,the Third Hospital of Heibei Medical University,Shijiazhuang 050051
Abstract：[Objective]To clarify the precise displacement of the popliteal artery(PA) during knee flexion using magnetic resonance imaging (MRI).[Method]MRI was used in 16 knees at 0° and 90° of flexion to measure the distance between the popliteal artery and the posterior tibial cortex (bone to artery distance, BAD )at two levels corresponding to the levels of osteotomy in total knee arthroplasty(TKR) and in high tibial osteotomy(HTO). The results were analysed using pairedsamples t test.[Result]At the level of TKR (0.5 to 1 cm below the tibial articular surface),the mean posterior movement of BAD from extension to 90° of flexion was 1.8 mm (-2～+5 mm) with a statistical significance(P=0.005). At the level of HTO(1.5 to 2 cm below the tibial articular surface), the mean change in BAD 1.4mm (-2～+4mm)was also statistically significant(P=0.005). At the two levels, the artery moved toward the tibia in 2 cases,respectively.[Conclusion]Knee flexion may be considered to be a safer position,still there is possible potential popliteal artery injury. ......
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