Missed Transient Patellar Dislocation in Younger Patients With Traumatic Knee Injuries

Background: Acute patellar dislocation is a common injury, with up to 40% of the cases missed due to a high rate of spontaneous reduction. Complications mainly arise due to osteochondral fractures, resulting in patellofemoral osteoarthritis and rupture of medial patellar stabilizers, leading to recu...

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Bibliographic Details
Published in:Journal of orthopedic & spine trauma 2016-06, Vol.2 (2)
Main Authors: Soroush Baghdadi, SM Javad Mortazavi, Mohammad Hassan Kaseb, Mohammad Ayati
Format: Article
Language:English
Subjects:
Osteochondral Fracture
Patellar Instability
Transient Patellar Dislocation
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Summary:Background: Acute patellar dislocation is a common injury, with up to 40% of the cases missed due to a high rate of spontaneous reduction. Complications mainly arise due to osteochondral fractures, resulting in patellofemoral osteoarthritis and rupture of medial patellar stabilizers, leading to recurrent patellar instability. Methods: Institutional database was retrospectively reviewed to find patients with missed transient patellar dislocation. From January 2010 to January 2015, ten otherwise healthy patients with a history of indirect trauma to the knee were diagnosed with missed patellar dislocation. They all had persistent pain and effusion, despite conservative treatment. Results: Eight patients eventually underwent arthroscopic debridement of osteochondral fractures and repair of ruptured ligaments, with no case of recurrent instability. Conclusions: Detailed history taking and physical examination of all acute knee injuries, with a standard three dimensional (3D) X-ray imaging and a low threshold to obtain magnetic resonance imaging (MRI) studies, could minimize cases of missed patellar dislocation and possibly severe complications.
ISSN:2538-2330
2538-4600
DOI:10.17795/jost-6678