Abstract
We report a patient who ingested a ring pull from a coke can in which could not be seen on radiography. We also want to emphasize the ability of this tool in detecting thin metallic and aluminium objects that are invisible on standard radiograms. Saz et al. found the sensitivity, specifity, positive and negative predictive values (PPV, NPV) of handheld metal detectors to be 88.6%, 100%, 100% and 55.5% respectively (95% confidence intervals) in patients who ingested a metallic foreign body
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