Klaucke Jonathan, O'Hara Nathan N, Peterson David, Gitajn Ida Leah, Natoli Roman, Sciadini Marcus F, Manson Theodore T, Nascone Jason W, Gage Mark, LeBrun Christopher, Pollak Andrew N, O'Toole Robert V
Department of Orthopaedics, R Adams Cowley Shock Trauma Center, University of Maryland School of Medicine, Baltimore, MD.
J Orthop Trauma. 2020 Jul;34(7):e256-e260. doi: 10.1097/BOT.0000000000001722.
We describe the novel quantitative lesser trochanter profile (QLTP) technique to determine the magnitude and direction of femoral malrotation and to compare its performance with the cortical step sign technique. For this assessment, 9 orthopaedic surgeons estimated the magnitude and direction of femoral malrotation with each technique in 198 anteroposterior view images of the proximal cadaveric femur and osteotomy sites. Based on the results, the main benefit of the QLTP technique over the cortical step sign technique is the ability to determine the direction of femoral malrotation. The QLTP technique was also more accurate in measuring malrotation and had less error. However, the QLTP technique requires additional imaging, and the mean difference in error between the 2 techniques might not be clinically meaningful.
我们描述了一种全新的定量小转子轮廓（QLTP）技术，用于确定股骨旋转不良的程度和方向，并将其性能与皮质台阶征技术进行比较。在本次评估中，9名骨科医生运用这两种技术，在198张近端尸体股骨和截骨部位的前后位图像中，估算股骨旋转不良的程度和方向。基于结果，QLTP技术相较于皮质台阶征技术的主要优势在于能够确定股骨旋转不良的方向。QLTP技术在测量旋转不良方面也更为准确，误差更小。然而，QLTP技术需要额外的成像，且两种技术之间误差的平均差异可能在临床上并无意义。
