Matsuda Yoshikazu, Ishii Yoshinori, Ichimura Kazunori
Ishii Orthopaedic and Rehabilitation Clinic, 1089 Shimo-oshi, Gyoda 361-0037, Japan.
J Orthop Sci. 2004;9(1):6-9. doi: 10.1007/s00776-003-0738-3.
To identify the center of the femoral head (FHC), which is critical for determining the mechanical axis of the femur in total knee arthroplasty (TKA), we used a high-resolution ultrasound technique in 200 hips in 128 patients with osteoarthritis of the knee. FHC was defined as the intersection of two lines: the maximum diameter of the femoral head between the superior and inferior edges of the head and the maximum diameter of the femoral head between the medial and lateral edges. Ultrasound identified the FHC within 5 mm in 56% of cases and within 10 mm in 89.5%. Ultrasound appears to be a highly reliable, noninvasive imaging modality for identifying the FHC preoperatively or even intraoperatively. Therefore, our procedure might ultimately be helpful in establishing the correct alignment of the prosthesis.
为了确定股骨头中心（FHC），这对于全膝关节置换术（TKA）中确定股骨的机械轴至关重要，我们对128例膝骨关节炎患者的200个髋关节采用了高分辨率超声技术。FHC被定义为两条线的交点：股骨头上下边缘之间股骨头的最大直径以及股骨头内外边缘之间股骨头的最大直径。超声在56%的病例中在5毫米范围内确定了FHC，在89.5%的病例中在10毫米范围内确定了FHC。超声似乎是一种高度可靠的非侵入性成像方式，可用于术前甚至术中识别FHC。因此，我们的方法最终可能有助于建立假体的正确对线。
