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Inclination of Blumensaat's line influences on the accuracy of the quadrant method in evaluation for anterior cruciate ligament reconstruction
| Title: | Inclination of Blumensaat's line influences on the accuracy of the quadrant method in evaluation for anterior cruciate ligament reconstruction |
| Authors: | Iwasaki, Koji Browse this author →KAKEN DB | | Inoue, Masayuki Browse this author | | Kasahara, Yasuhiko Browse this author →KAKEN DB | | Tsukuda, Koichiro Browse this author | | Kawahara, Harunori Browse this author | | Yokota, Isao Browse this author →KAKEN DB | | Kondo, Eiji Browse this author →KAKEN DB | | Iwasaki, Norimasa Browse this author →KAKEN DB | | Yasuda, Kazunori Browse this author →KAKEN DB |
| Keywords: | Anterior cruciate ligament reconstruction | | Quadrant method | | Blumensaat's line | | Bone | | tunnel position | | Computed tomography |
| Issue Date: | Jun-2020 |
| Publisher: | Springer |
| Journal Title: | Knee surgery sports traumatology arthroscopy |
| Volume: | 28 |
| Issue: | 6 |
| Start Page: | 1885 |
| End Page: | 1893 |
| Publisher DOI: | 10.1007/s00167-019-05619-8 |
| Abstract: | Purpose The quadrant method is used to evaluate the bone tunnel position with the grid based on the Blumensaat's line in anterior cruciate ligament (ACL) reconstruction. This study aimed to clarify the influence of variation in the Blumensaat's line on the accuracy of the quadrant method measurements. Methods A retrospective review of the radiological records of patients aged 18-30 years who underwent computed tomography (CT) scanning of the knee joint was conducted. The Blumensaat's line inclination angle (BIA), along with the most posterior point of the posterior condyle (point P) position using the quadrant method and morphology of the Blumensaat's line were measured on true lateral transparent three-dimensional CT images of the distal femoral condyle in 147 patients. Statistical analysis was conducted to determine associations among these measurements. Results BIA was 37.5 degrees (standard deviation 4.2 degrees; range 27 degrees-48 degrees). The point P position was significantly correlated with BIA in the high/low (R-2 = 0.590, P < 0.0001) and deep/shallow (R-2 = 0.461, P < 0.0001) directions. The morphology of the Blumensaat's line was straight in 35 knees (23.8%); whereas, the remaining 112 knees (76.2%) were not straight but had some hill on the Blumensaat's line. No significant difference among the morphological variation of the Blumensaat's line was observed in BIA and the point P position. Conclusion There was a strong correlation between BIA and the point P measured using the quadrant method, suggesting the influence of the Blumensaat's line on the accuracy of the quadrant method measurements in ACL reconstruction. As for the clinical relevance, surgeons should be careful in application of the quadrant method for ACL reconstruction, because the variation of the Blumensaat's line inclination influences the accuracy of this method. |
| Rights: | This is a post-peer-review, pre-copyedit version of an article published in Knee surgery sports traumatology arthroscopy. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00167-019-05619-8 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/81700 |
| Appears in Collections: | 医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 岩崎 浩司
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