What should be done immediately if a patient with a metal stent starts spinning violently inside the magnetic resonance imaging (MRI) scanner?

Immediate Emergency Response to Patient Spinning in MRI

Immediately remove the patient from the MRI scanner bore by pulling them out of the magnetic field - this is a life-threatening emergency indicating the patient has a ferromagnetic object or implant that is experiencing violent torque and displacement forces from the static magnetic field. Do not attempt resuscitation or intervention while the patient remains in the scanner.

Critical First Actions

The violent spinning indicates a ferromagnetic object is experiencing both translational force (pulling toward the magnet center) and torque (attempting to align with the magnetic field) 1. This can cause:

• Severe tissue damage and hemorrhage if the object is an implant
• Crushing or trapping injuries
• Dislodgement of foreign bodies near blood vessels or in the eye
• Potentially fatal outcomes

Primary response algorithm:

1. Stop the scan immediately - halt all imaging sequences
2. Remove the patient from the bore - physically pull the patient table out of the scanner as rapidly as safely possible to exit the magnetic field
3. Evacuate to a safe zone - move the patient completely out of the MR environment (Zone IV) to an area where resuscitation equipment functions normally 2, 1
4. Assess for injuries - check for bleeding, tissue damage, neurological changes
5. Initiate resuscitation if needed - only after complete removal from the magnetic field, as standard resuscitation equipment is unsafe in the MR environment

Why This Occurs

This catastrophic event represents a screening failure 1. The guidelines emphasize that ferromagnetic objects within the 3 mT field contour experience attractive forces sufficient to become dangerous projectiles and torque forces that cause them to align with the field 1. Even small ferromagnetic objects can cause severe injury or death 3.

Critical Pitfalls to Avoid

• Never attempt to quench the magnet first - this wastes precious seconds and doesn't immediately eliminate the hazard; patient removal is faster and safer
• Never attempt resuscitation inside the scanner - standard equipment (defibrillators, oxygen tanks, monitors) becomes projectiles and won't function properly 2, 1
• Don't assume the stent was properly screened - most modern cardiovascular stents are MR Safe or MR Conditional at 1.5-3T 1, but this patient clearly has an MR Unsafe implant or foreign body

Post-Emergency Actions

After stabilizing the patient:

• Identify the ferromagnetic object - determine what implant or foreign body caused the reaction through imaging (plain films, CT) and patient history review
• Review the screening process - investigate how this patient bypassed safety protocols 1
• Document thoroughly - this is a serious adverse event requiring incident reporting
• Notify the MR Safety Expert and MR Responsible Person immediately 1

Prevention Context

This scenario underscores why guidelines mandate rigorous screening protocols using written questionnaires followed by oral questioning for all patients 1, 3. The screening must identify ferromagnetic foreign bodies or implants that are electrically, magnetically, or mechanically activated anywhere in the body 3. All implants must be verified as MR Safe or MR Conditional with specific manufacturer documentation before scanning 1.

The most serious MRI-related injuries reported involve ferromagnetic objects becoming missiles or experiencing displacement forces 3. This emergency represents exactly the type of preventable catastrophic event that comprehensive screening is designed to avoid.