Bassett KE et al, 1999, USA1 | 176 children attending an emergency department with a known or suspected metallic foreign body. Age range 6 months to 15 years. | Diagnostic | Experienced operators | Sensitivity 100% | Sample size limits power |
| | | | Specificity 92.4% | |
| Hand held metal detector in experienced and inexperienced hands. Radiographic gold standard | | Inexperienced operators | Sensitivity 95.75% | |
| | | | Specificity 81% | |
| | | | 3 false negatives | |
Seikel K et al, 1999, USA2 | 91 children with suspected coin ingestion. Age range 9 months to 17 years. Radiographic gold standard | Diagnostic | Inexperienced operators | Sensitivity 100% | Sample size limits power |