Metal detector and swallowed metal foreign bodies in children

Area of Science:

• Pediatric Emergency Medicine
• Diagnostic Imaging
• Medical Device Evaluation

Background:

• Swallowed metal foreign bodies (MFBs) are a common pediatric emergency.
• Accurate diagnosis is crucial for timely intervention and preventing complications.
• Radiography is the standard diagnostic tool, but has limitations with non-radio-opaque materials.

Purpose of the Study:

• To assess the diagnostic accuracy of a metal detector for swallowed MFBs in children.
• To determine the metal detector's capability in identifying non-radio-opaque MFBs.
• To compare metal detector performance with radiography.

Main Methods:

• Prospective study involving 231 children presenting with suspected MFB ingestion.
• Evaluation using both a metal detector and radiography.
• Correlation of findings with clinical history and radiographic confirmation.

Main Results:

• A definite history of MFB ingestion was reported in 81% of cases.
• The metal detector detected MFBs in 183 children, while radiography confirmed radio-opaque MFBs in 181.
• In cases with suspected but not definite ingestion (45 children), both methods confirmed MFBs in only four.

Conclusions:

• Metal detectors demonstrate a high detection rate for swallowed MFBs in children.
• This technology is valuable for detecting non-radio-opaque MFBs, such as those made of aluminum.
• Diagnostic accuracy is significantly higher when there is a definite history of foreign body ingestion.