The use of a hand-held metal detector for localisation of ingested metallic foreign bodies - a critical investigation

Eur J Pediatr. 2004 Apr;163(4-5):257-9. doi: 10.1007/s00431-004-1401-5. Epub 2004 Feb 5.


Ingested metallic foreign bodies (MFBs) are usually diagnosed by taking X-ray films of the neck, chest and/or abdomen. This study evaluates the use of a hand-held metal detector (HHMD) for the diagnosis and localisation of MFBs. In a prospective study, 53 consecutive paediatric patients with history of a swallowed MFB were examined with X-rays and HHMD. In 47 children, the MFB could be verified radiologically. Coins were most frequently swallowed. The HHMD could detect and locate all coins but only 47% of other MFBs. There were no false-positive results. A HHMD is an effective tool for screening the location of suspected ingested coins. This method is easy, inexpensive and free of radiation. Very small MFBs cannot be reliably detected.

Conclusion: If an innocuous metallic foreign body is clearly identified with a hand-held metal detector in the stomach or lower gastrointestinal tract of an asymptomatic child, additional radiological confirmation is not required.

MeSH terms

  • Adolescent
  • Child
  • Child, Preschool
  • Diagnostic Techniques, Digestive System
  • Female
  • Foreign Bodies / diagnosis*
  • Foreign Bodies / diagnostic imaging
  • Gastrointestinal Tract / diagnostic imaging*
  • Humans
  • Male
  • Numismatics
  • Prospective Studies
  • Radiography