Blumensaat's line

Blumensaat's line is a line which corresponds to the roof of the intercondylar fossa of femur as seen on a lateral radiograph of the knee joint.[1] The angle at which this line appears on the radiograph can be used to determine the position of the patella or diagnose an ACL injury.[2]

Clinical Use

On a normal radiograph, the line intersects the inferior pole of the patella, and so can be useful in diagnosing a broken femur as well as a patellar tendon rupture.

It also helps to define "Schottle point" intra-operatively for reconstruction of MPFL(Medial patello-femoral ligament.)[3]

References

Blumensaat, C (1938). "Die Lageabweichungen und Verrenkungen der Kniescheibe". Ergebnisse der Chirurgie und Orthopedie. 31: 149–223.
"Blumensaat line | Radiology Reference Article | Radiopaedia.org". radiopaedia.org. Retrieved 2015-12-10.
McCarthy, Mark; Ridley, TJ; Bollier, Matthew; Wolf, Brian; Albright, John; Amendola, Annunziato (2013). "Femoral Tunnel Placement in Medial Patellofemoral Ligament Reconstruction". The Iowa Orthopaedic Journal. 33: 58–63. ISSN 1541-5457. PMC 3748893. PMID 24027462.

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[1] Blumensaat, C (1938). "Die Lageabweichungen und Verrenkungen der Kniescheibe". Ergebnisse der Chirurgie und Orthopedie. 31: 149–223.

[2] "Blumensaat line | Radiology Reference Article | Radiopaedia.org". radiopaedia.org. Retrieved 2015-12-10.

[3] McCarthy, Mark; Ridley, TJ; Bollier, Matthew; Wolf, Brian; Albright, John; Amendola, Annunziato (2013). "Femoral Tunnel Placement in Medial Patellofemoral Ligament Reconstruction". The Iowa Orthopaedic Journal. 33: 58–63. ISSN 1541-5457. PMC 3748893. PMID 24027462.