Friday, March 19, 2010

Blumensaat Line

The Blumensaat line is a linear shadow on lateral radiographs of the knee that corresponds to the roof of the intercondylar notch. The Blumensaat line forms an angle of between 120 and 153 with the vertical axis of the femur.

The Blumensaat line has been suggested as an indication of the relative position of the patella; however, too much variation is introduced by knee flexion, angle of the Blumensaat line with the femur, vertical length of the patella, and depth of the intercondylar notch for this method to be useful.


Seyahi A, Atalar AC, Koyuncu LO, Cinar BM, Demirhan M. Blumensaat line and patellar height. Acta Orthop Traumatol Turc. 2006;40(3):240-7.


  1. Hey Amini, I was just doing a search for this subject and was unknowingly reading from your blog before I realized that I knew you. Keep up the good work. Hope all is well man.

    Josh (rotated with you last year as med student)

    1. Hey Josh! Hope all is well with residency and the book! Looks like it's getting good reviews on Amazon!


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