caa a22 4500 605458863 CHVBK 20210128100231.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00167-013-2781-8 doi (NATIONALLICENCE)springer-10.1007/s00167-013-2781-8 A modified quadrant method for describing the femoral tunnel aperture positions in ACL reconstruction using two-view plain radiographs [Elektronische Daten] [Masafumi Horie, Takeshi Muneta, Junya Yamazaki, Tomomasa Nakamura, Hideyuki Koga, Toshifumi Watanabe, Ichiro Sekiya] Purpose: A modified quadrant method was developed for description of femoral tunnel aperture positions on the sagittal plane after double-bundle anterior cruciate ligament (ACL) reconstruction, which can be measured by using two-view radiographs. The purpose of the study is to provide a new measurement method and to evaluate the reproducibility and accuracy of the method. Methods: Forty-one patients who had undergone a double-bundle ACL reconstruction were investigated. Two-view plain radiographs, a 45-degree-flexion posterior-anterior standing (Rosenberg) and a lateral view, were taken at 1year postoperatively, and the femoral tunnel positions were measured. Intra- and inter-observer reproducibility was calculated by means of intra-class correlation coefficient (ICC). Also, the accuracy of the method was evaluated by comparing the measurement from three-dimensional computed tomography (3D-CT). Results: Intra-observer reproducibility was excellent (ICC>0.9). Inter-observer reproducibility of antero-medial (AM) tunnel position was almost perfect (ICC>0.8) and that of postero-lateral (PL) tunnel was substantial (ICC>0.7). The accuracy of the method was assessed by comparing the measurement from 3D-CT and was found to be almost perfect (ICC>0.8). With the modified quadrant method, the average height of AM and PL tunnels were 17.8 and 44.4%, respectively, and the depth of AM and PL tunnels were 25.5 and 36.7%, respectively. Conclusions: A modified quadrant method was found to have acceptable reproducibility and accuracy. The method is useful for describing the femoral tunnel aperture positions in ACL reconstruction because of its easiness and simplicity. By using this method, it is possible to analyse the femoral tunnel position even in the cases without CT analysis. Level of evidence: IV. Springer-Verlag Berlin Heidelberg, 2013 Femoral tunnel position nationallicence Anterior cruciate ligament reconstruction nationallicence Quadrant method nationallicence 45-degree-flexion posterior-anterior standing view nationallicence Measurement reproducibility nationallicence Image analysis nationallicence Horie Masafumi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Muneta Takeshi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Yamazaki Junya Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Nakamura Tomomasa Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Koga Hideyuki Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Watanabe Toshifumi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Sekiya Ichiro Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 981-985 0942-2056 23:4<981 2015 23 167 https://doi.org/10.1007/s00167-013-2781-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00167-013-2781-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Horie Masafumi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Muneta Takeshi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Yamazaki Junya Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Nakamura Tomomasa Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Koga Hideyuki Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Watanabe Toshifumi Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 700 1- Sekiya Ichiro Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, 113-8519, Tokyo, Japan aut NATIONALLICENCE 773 0- Knee Surgery, Sports Traumatology, Arthroscopy Springer Berlin Heidelberg 23/4(2015-04-01), 981-985 0942-2056 23:4<981 2015 23 167