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JOURNAL ARTICLE

Bedside sonography for the diagnosis of esophageal food impaction

Jennifer Singleton, Jesse M Schafer, Jeremiah S Hinson, Erin M Kane, Sherieka Wright, Beatrice Hoffmann
American Journal of Emergency Medicine 2017, 35 (5): 720-724
28119013

BACKGROUND: Esophageal foreign body (EFB) and impaction are common gastrointestinal emergencies. Detection with standard imaging can be challenging. Computed tomography is a commonly used non-invasive imaging modality, but is not 100% sensitive and not always feasible. Sensitivity of plain film x-ray varies widely and the addition of a barium swallow can obscure evaluation by subsequent esophagogastroduodenoscopy (EGD). Use of emergency ultrasound (EUS) for detection of EFB in adults has not been previously studied.

OBJECTIVE: To evaluate the role of EUS in detection of EFB and to characterize sonographic findings.

METHODS: A case control series of five patients with clinical suspicion of EFB underwent EUS, and findings were compared to five healthy controls. Patients were evaluated for persistent air-fluid levels after swallowing, esophageal dilatation, and visualization of EFB.

RESULTS: All patients with suspected EFB had esophageal dilatation (17.5mm vs 9.3mm in healthy controls; p=0.0011) and persistent air-fluid levels after swallowing. EFB was visualized on EUS in 60% of patients. All patients had EFB confirmed on EGD except one, who vomited a significant food bolus during EUS and prior to EGD.

CONCLUSION: In patients with suspected EFB, point-of-care ultrasound may identify those with impaction. Suggestive findings include cervical esophageal dilatation and persistent intraluminal air-fluid levels after swallowing. EUS is a rapid, convenient test with the potential to expedite definitive management while decreasing cost and radiation exposure in this patient population.

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