Opposites attract: a case of magnet ingestion

Helen H L Wong1, Bruce A Phillips

  • 1Emergency Department, British Columbia Children's Hospital, Vancouver, British Columbia.

CJEM
|October 1, 2009
PubMed

Insights

Multiple magnet ingestion in children can cause severe gastrointestinal complications. Early surgical evaluation is crucial for pediatric patients ingesting multiple magnets to prevent serious outcomes.

Area of Science:

  • Pediatric Gastroenterology
  • Pediatric Surgery
  • Emergency Medicine

Background:

  • Foreign-body ingestion is common in children, usually with minor consequences.
  • Ingestion of multiple magnets, particularly from toy sets, poses significant risks.

Observation:

  • A 5-year-old girl presented with vomiting and abdominal pain after ingesting two magnets hours apart.
  • Radiography confirmed magnet presence; laparoscopy revealed bowel necrosis and perforation.

Findings:

  • Multiple magnets ingested caused extensive bowel wall damage, necessitating surgical repair.
  • The case highlights the severe potential complications of pediatric magnet ingestion.

Implications:

  • Highlights the critical need for prompt surgical consultation in pediatric cases of multiple magnet ingestion.
  • Emphasizes the severe risks associated with magnetic toy ingestion in children.
  • Informs emergency physicians about the necessity of early surgical referral to prevent life-threatening complications.

Related Concept Videos

Magnetism01:30

Magnetism

Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
Magnetic Force01:18

Magnetic Force

In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...