User's Manual Part 1

2-36
3880 Patient Worn ECG Accessories
• Use with Ultra-High Field MRI Systems greater than 0.5 Tesla static field.
• Use with whole body average Specific Absorption Rates (SAR) up to 4.0 W/kg or less.
NOTE
• When moving the 3880 monitor within high magnetic fields (>2,000 gauss) Eddy Current
effects may be noticeable. These are forces generated in the device which resists
motion through the intense magnetic field. Such effects are normal and present no risk
of free magnetic movement of the unit.
• Scanning directly across the plane of the ECG electrode, a slight image distortion may
be seen at the skin surface where the ECG electrode is positioned.
• Accessory cables and tubing shall be placed parallel to each other and aligned with the
main center line of the MRI Bore.
• 3885-T Remote Tablet is non-magnetic to aid in the patient setup workflow. It is capable
of operation up to 15,000 Gauss but is not intended for operation during scanning as
artifacts may be noticeable on the image
! WARNING
• The 1120 AC Adapter is magnetic. Keep outside of the 1,000 Gauss line, or at least 10
feet (3 meter) from the MRI magnet. Secure with Velcro straps provided to the floor.
NEVER Velcro, never secure the AC Adapter directly to the monitor or mobile cart.
• To ensure safety, always position the 1120 AC Adapter in a manner which allows for
easy disconnection of the device from AC mains.
• The 3885-B Base Station contains ferrous material and should not be taken into the MRI
room suite Zone IV.
• Use with higher SAR greatly increases the risk of patient burns.
• The high radio frequency (RF) power used in MRI scanning poses an ever-present risk
of excessive heat at the monitoring sites and, therefore, the risk of RF burn. The risk of
patient burn greatly increases if power levels greater than a whole body averaged
specific absorption rate (SAR) of 4.0 W/Kg is used. Monitoring of the ECG based upon
the whole body average SAR of 4.0 W/Kg may underestimate the actual SAR value at
the ECG leads. When monitoring unconscious patients additional precautions maybe
required.
• RF burn risk increases when metallic items and / or multiple conductive sensors/cables
are in use such as ECG lead wires. Such combinations are not recommended. Always
remove non IRadimed accessories prior to performing a MRI procedure.
• Patient lead cables which become inadvertently looped during an MRI examination may
act as conductive lines for RF induced currents, resulting in excessive heating and
possible burns. When patient lead cables or other cables form a conductive loop in
contact with the patient's tissue, minor to severe burning can result.
• Position all cables in the center of the MRI bore and avoid contacting the internal side of
the MRI bore during scanning.
! CAUTION
• High levels of RF energy may cause patient heating or burns. Inspect electrode sites for
heating for scan times (i.e., per pulse sequence) greater than 15 minutes.
• Medical drug treatment can alter the sensitivity to skin heating.
• When using or repairing the equipment, do not bring any tools or components containing
ferrous material into the magnet room (Zone IV). Risk of serious injury and/or damage to
the equipment can result.