Magnetic resonance imaging interactions with a sacral neuromodulation system.

Area of Science:

• Medical Devices
• Neuroscience
• Radiology

Background:

• Sacral neuromodulation (SNM) effectively treats functional urinary and bowel disorders.
• Historically, SNM systems posed contraindications for Magnetic Resonance Imaging (MRI) scans.
• Recent FDA approvals allow specific SNM systems for MRI conditional full-body scans.

Purpose of the Study:

• To review the evolution of MRI compatibility for SNM systems.
• To highlight the importance of understanding MRI safety for active implantable medical devices (AIMDs).
• To inform physicians about advancements in MRI-eligible SNM technology.

Main Methods:

• Explanation of MRI physics and its interaction with AIMDs.
• Identification of potential safety hazards, focusing on radio frequency (RF) related risks.
• Discussion of risks associated with "off-label" scans and lead complications.

Main Results:

• Newer SNM systems (Axonics, Medtronic InterStim II/Micro) have received FDA approval for 1.5T and 3T full-body MRI conditional scans.
• Understanding MRI safety for these devices is crucial due to technological advancements.
• Manufacturer guidelines are essential for safe scanning.

Conclusions:

• Adherence to device manufacturer's MRI guidelines is paramount for patient safety.
• Thorough understanding of specific device conditions is necessary.
• Avoid generalizations about MRI safety based on limited data.