Knee
Insall-Salvati ratio
0.8-1.2
Radiography (Lateral)
a : length of patellar tendon
b : lenght of patella
Insall-Salvati index = a / b
Patella baja <0.8
Patella alta >1.2
Reference
Biedert RM. Patellofemoral Disorders, Diagnosis and Treatment. Wiley. (2005).
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