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JOURNAL ARTICLE

Sonographically guided proximal tibiofibular joint injection: technique and accuracy

Jay Smith, Jonathan T Finnoff, Bruce A Levy, Jim K Lai
Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine 2010, 29 (5): 783-9
20427791

OBJECTIVE: The purpose of this investigation was to describe a technique for sonographically guided proximal tibiofibular joint (PTFJ) injections and compare its accuracy with that of palpation guided injections in a cadaveric model.

METHODS: A single experienced operator completed 12 sonographically guided and 12 palpation guided PTFJ injections in unembalmed cadavers. The injection order was randomized, and all injections were completed with diluted colored latex. Coinvestigators blinded to the injection technique dissected each specimen and graded the colored latex location as accurate (in the PTFJ), accurate with overflow (within the PTFJ but also in other regions), or inaccurate (no latex in the joint). For statistical analysis, all injections placing latex within the PTFJ were considered "accurate," whereas "inaccurate" injections resulted in no PTFJ latex.

RESULTS: All 12 sonographically guided PTFJ injections accurately placed latex into the PTFJ (100% accuracy), whereas only 7 of 12 palpation guided injections (58%) placed latex within the PTFJ (P = .01). All 5 inaccurate palpation guided injections were superficial and inferior to the PTFJ. Four of 12 accurate sonographically guided PTFJ injections (33%) showed some overflow into the adjacent anterior musculature, whereas 5 of the accurate palpation guided injections (42%) resulted in overflow into the anterior musculature (1), knee joint (2), or both (2).

CONCLUSIONS: This cadaveric investigation suggests that sonographic guidance can be used to inject the PTFJ with a high degree of accuracy and should be considered superior to palpation guidance. Clinicians should consider using sonographic guidance to inject the PTFJ for diagnostic or therapeutic purposes when clinically indicated.

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