A series of six patients had foreign bodies (sheared or broken intravenous lines) lying free in the circulation. "Nonsurgical" transvenous removal was accomplished successfully using a wire snare. Sites of foreign body embolism and subsequent removal included the superior vena cava, the right atrium, the right ventricle, and the pulmonary artery.
Block PC. Transvenous Retrieval of Foreign Bodies in the Cardiac Circulation. JAMA. 1973;224(2):241–242. doi:10.1001/jama.1973.03220150049014
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