Blumensaat line

Blumensaat line, also known as the intercondylar line, is the line drawn along the roof of the intercondylar notch of the femur on a sagittal view of the knee.

It can be used for:

• indicating the relative position of the patella - normally intersects the lower pole of the patella
• evaluating for ACL injury - normal ACL Blumensaat angle is ≤15°
• describing the course of an ACL graft (see the evaluation of ACL reconstruction)
• identifying the location of lateral femoral condyle sulcus - ​should be within 10 mm of the line

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

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

Siehe auch:

• deep lateral femoral notch (sulcus) sign
• Sulcus condylopatellaris
• Kniegelenk seitlich
• Fossa intercondylaris
• vordere Kreuzbandplastik