PMC7593758_01
Lateral knee radiographs after bilateral patellar tendon rupture, showing patella alta, knee effusions, and irregularity of the patellar tendons. Confirmed diagnosis using the Insall-Salvati ratio.
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Insall-Salvati ratios measured 1.6 and 1.47 for right and left knee, respectively (Figure 1) (normal values range from 0.8 to 1.2; patella alta > 1.2 and patella baja < 0.8).
Intraoperative photo showing the ruptured patellar tendon of the right knee.
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The patellar tendon rupture was identified near the proximal osteotendinous junction bilaterally (Figure 2).
Radiographic control 10 weeks after surgery.
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The postoperative course was uneventful, and radiographic control was satisfactory (Figure 3).
Seven months after surgery: 135  flexion, 0  extension at both knees.
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Upon examination seven months after surgery, the patient showed an adequate range of motion of both knees (135  flexion, 0  extension) (Figure 4).