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Two- plane point of care ultrasonography helps in the differential diagnosis of pulled elbow

Injury Feb 22, 2020

Varga M, Papp S, Kassai T, et al. - Pulled elbow (PE), the most common injury in children under the age of five years, can be managed with a simple reduction maneuver without the need of any imaging modality but in cases of fractures mimicking the physical findings of PE, reduction should not be attempted. Researchers conducted this prospective diagnostic study examining the accuracy of a sonographic testing method in the differential diagnosis of PE. They assessed 205 children aged 0-5 with clinical suspicion for PE on whom they performed a two-plane point of care sonographic examination immediately after history taking and primary physical survey. Of these, 196 cases (95.6%) were finally diagnosed with PE and 9 children had type I supracondylar humerus fractures (4.39%). Synovial fringe enlargement positivity was detected only in the PE group (156 cases, 76%) and elevated fat pad sign(FPS) was negative in all but one PE cases, while all fractures exhibited FPS positivity without exception. Appraising the two parameters together both sensitivity, specificity, negative and positive predictive value were 100%. Outcomes suggest that for confirming the diagnosis of PE and excluding the presence of fractures, they identified the two plane sonographic point of care method as an effective tool. It is an easy, standard and objective procedure which can be used as a fast diagnostic test before reduction attempts.
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