Inclination of Blumensaat's line influences on the accuracy of the quadrant method in evaluation for anterior cruciate ligament reconstruction

Iwasaki, Koji; Inoue, Masayuki; Kasahara, Yasuhiko; Tsukuda, Koichiro; Kawahara, Harunori; Yokota, Isao; Kondo, Eiji; Iwasaki, Norimasa; Yasuda, Kazunori

Inclination of Blumensaat's line influences on the accuracy of the quadrant method in evaluation for anterior cruciate ligament reconstruction

Iwasaki, Koji; Inoue, Masayuki; Kasahara, Yasuhiko et al.

Knee surgery sports traumatology arthroscopy, 2020, 28(6), 1885-1893

Permalink : https://hdl.handle.net/2115/81700

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アクセス権	open access
URI	https://hdl.handle.net/2115/81700
タイトル	Inclination of Blumensaat's line influences on the accuracy of the quadrant method in evaluation for anterior cruciate ligament reconstruction
著者	Iwasaki, Koji ; Inoue, Masayuki ; Kasahara, Yasuhiko ; Tsukuda, Koichiro ; Kawahara, Harunori ; Yokota, Isao ; Kondo, Eiji ; Iwasaki, Norimasa ; Yasuda, Kazunori
e-Rad_Researcher 40771895 著者名 Iwasaki, Koji
著者名 Inoue, Masayuki
e-Rad_Researcher 00581927 著者名 Kasahara, Yasuhiko
著者名 Tsukuda, Koichiro
著者名 Kawahara, Harunori
e-Rad_Researcher 20761414 著者名 Yokota, Isao
e-Rad_Researcher 60374724 著者名 Kondo, Eiji
e-Rad_Researcher 30322803 著者名 Iwasaki, Norimasa
e-Rad_Researcher 20166507 著者名 Yasuda, Kazunori
言語	英語
キーワード	Anterior cruciate ligament reconstruction
	Quadrant method
	Blumensaat's line
	Bone
	tunnel position
	Computed tomography
発行日	2020-06
出版者	Springer
収録物名	Knee surgery sports traumatology arthroscopy
巻(号)	28(6)
ページ	1885-1893
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	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
PISSN	0942-2056
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s00167-019-05619-8