Revision 14 for 'Blumensaat line'

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Blumensaat line

Blumensaat line is the line drawn alone the roof of intercondylar notch of the femur as seen on lateral radiograph of the knee joint. It can been 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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