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Obtain an MRI
5%
123/2514
Ice, rest, and observation
1%
21/2514
Physical therapy to regain motion
0%
7/2514
Knee arthroscopy and repair
Open surgical repair
93%
2334/2514
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The mechanism of injury and radiographs are consistent with a complete patellar tendon rupture. The radiographs reveal a patella alta, which in this case is indicative of complete patellar tendon rupture. This can be quantified by using the Insall-Salvati ratio (patellar tendon length / patellar bone length): PTL/PBL normal =1, >1.2 is patella alta, <0.8 is patella baja) with the knee flexed to 30 degrees. The reference by Brooks et al reviews the diagnosis and treatment of extensor mechanism ruptures. A complete patellar tendon rupture requires open surgical repair. A partial tear with an intact extension mechanism may be treated conservatively. An MRI is not needed for diagnosis.
3.7
(23)
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