Soraganvi Prasad C, Narayan Gowda Bs, Rajagopalakrishnan Ramakanth, Gavaskar Ashok S
Department of Orthopaedics, PES Institute of Medical Science and Research, Kuppam, Chittor District, Andra Pradesh, India.
Department of Orthopaedics, Parvathy Hospital, Choolaimedu, Chennai, Tamil Nadu, India.
Indian J Orthop. 2014 Sep;48(5):525-8. doi: 10.4103/0019-5413.139883.
Rotational dislocations of patella, which involve rotation of the patella around a horizontal or vertical axis are rare. These rotational dislocations of patella are difficult to reduce by close methods. These dislocations can have associated osteochondral and retinacular injury. We report a case of a 20-year-old male who presented with swelling and pain in the right knee following a motor cycle accident. Radiological evaluation using the computed tomography revealed a patellar dislocation with a concomitant Hoffa fracture. Patella was rotated around the vertical axis and was incarcerated into the Hoffa fracture. This is a very rare injury and first of its kind to be reported. The difficulties in diagnosis, mechanism of injury and management have been discussed. We feel closed reduction of such an injury is likely to fail and open reduction is recommended.
髌骨旋转脱位较为罕见，它涉及髌骨围绕水平或垂直轴的旋转。这些髌骨旋转脱位难以通过闭合方法复位。此类脱位可能伴有骨软骨和支持带损伤。我们报告一例20岁男性，在摩托车事故后出现右膝肿胀和疼痛。使用计算机断层扫描进行的放射学评估显示髌骨脱位并伴有霍法骨折。髌骨围绕垂直轴旋转并嵌顿于霍法骨折处。这是一种非常罕见的损伤，且为首例报道。本文讨论了该损伤的诊断难点、损伤机制及治疗方法。我们认为此类损伤采用闭合复位很可能失败，建议行切开复位。
