Potential Interactions For Implanted Neurostimulation Systems In The Mri Environment - Medtronic 97702 Instrucciones De Uso

Potential interactions for implanted neurostimulation systems in
the MRI environment
The Medtronic neurostimulation systems with SureScan MRI Technology have
been designed to minimize the potential interactions described in this section
MR
when the appropriate conditions described in this manual are followed.
Heating – The RF fields generated by an MRI scanner induce RF energy onto an implanted
lead system that may cause heating at the lead electrodes or along the lead body. In
addition, the gradient magnetic and RF fields may cause heating of the neurostimulator.
Note: Heating can occur even if only a lead or extension is implanted.
Factors that increase the risks of heating and patient injury include, but are not limited to,
the following:
▪
High MRI specific absorption rate (SAR) RF power levels
▪
Low impedance leads or extensions (Medtronic product names or model numbers
designated by a "Z," an "LZ," or "low impedance")
▪
Implanted lead systems with small surface area electrodes
▪
Short distances between lead electrodes and heat-sensitive tissue
Magnetic field interactions – The magnetic material of an implanted system may exert
force, vibration, and torque effects due to the static magnetic field and gradient magnetic
fields produced by an MRI scanner. Patients may feel a mild tugging or vibration sensation
at the site of the device implant. Patients being scanned with recent implant incisions should
be monitored for any surgical wound discomfort.
Induced stimulation – The gradient magnetic and RF fields produced by an MRI scanner
induce energies onto an implanted lead system that could potentially cause unintended
stimulation, which the patient could experience as a tingling, shocking, or jolting
sensation.
Note: Induced stimulation can occur even if only a lead or extension is implanted.
Device damage – The voltages induced by the MRI fields may damage the neurostimulator
electronics requiring reprogramming, explantation, or replacement.
Device interactions – MRI may affect the operation of the neurostimulator and require
reprogramming of the neurostimulator with the clinician programmer after the MRI scan.
The MRI may also reset the parameters to power-on-reset (POR) settings, which may also
require reprogramming of the neurostimulator after the MRI scan.
MRI guidelines for Medtronic neurostimulation systems for chronic pain English 7