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

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 measurement...

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Bibliographic Details
Published in:Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA sports traumatology, arthroscopy : official journal of the ESSKA, 2020-06, Vol.28 (6), p.1885-1893
Main Authors: Iwasaki, Koji, Inoue, Masayuki, Kasahara, Yasuhiko, Tsukuda, Koichiro, Kawahara, Harunori, Yokota, Isao, Kondo, Eiji, Iwasaki, Norimasa, Yasuda, Kazunori
Format: Article
Language:English
Subjects:
Accuracy
Adolescent
Adult
Anterior cruciate ligament
Anterior Cruciate Ligament Reconstruction - methods
Computed tomography
Female
Femur
Femur - diagnostic imaging
Femur - surgery
Humans
Imaging, Three-Dimensional
Inclination angle
Knee
Knee Joint - diagnostic imaging
Knee Joint - surgery
Male
Measurement methods
Medical personnel
Medicine
Medicine & Public Health
Morphology
Orthopedics
Retrospective Studies
Statistical analysis
Tomography, X-Ray Computed
Variation
Young Adult
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Summary: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° (standard deviation 4.2°; range 27°–48°). The point P position was significantly correlated with BIA in the high/low ( R 2  = 0.590, P  
ISSN:0942-2056
1433-7347
DOI:10.1007/s00167-019-05619-8