PEM Pearls: Ultrasound for Diagnosing Occult Supracondylar Fractures
Supracondylar humerus fractures are the most common type of elbow fracture in pediatric patients, most often seen in a fall on an outstretched hand (FOOSH) or a fall on a hyper-extended elbow.1,2 If there is no obvious fracture on x-rays, the patient may have an occult fracture; look for secondary radiographic signs including a posterior fat pad sign, an enlarged anterior fat pad or ‘sail sign’, or malalignment. Occult supracondylar fractures (those with initial normal radiographs that are later diagnosed in follow up) make up 2-18% of all the fractures we see in kids.3 When x-ray findings are nonspecific but the index of suspicion for fracture remains high, ultrasound may aid in your clinical decision making.
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