Revision 13 for 'Blumensaat line'

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Blumensaat line

Blumensaat line corresponds to the roof of intercondylar notch of the femur as seen on lateral radiograph of the knee joint. It canbeen used for:

  • indicating the relative position of the patella as normally this line intersects the lower pole of the patella
  • suggesting ACL injury as the normal ACL Blumensaat angle is ≤15°

It may not always be straight and three types have been described 3:

  • straight: ~ 35%
  • small hill: ~ 20% 
  • large hill: ~ 45%

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