COMPLIANCE INFO_2021 - Laserfiche WebLink

Home Browse Search

CRadNet HAZARDOUS MATERIALS BUSINESS PLAN MRI Manual / Regulatory Affairs Original Effective Date: April 28, 2021 Site access is immediately restricted to all individuals until the arrival of the MRI manufacturers' service engineer. This is especially important if cryogenic gases are observed to have vented partially or completely into the MRI system scan room itself, as evidenced in part by the sudden appearance of white "clouds" or"fog" around or above the MRI scanner. The thermal expansion of the cryogens, if released into the MRI system room, can positively pressurize the magnet room and entrap persons inside until such time as the pressure is equalized. Entrapment is caused when the high pressure prevents anyone from opening a door that swings in to the pressurized room. MRI units can be installed with different safety mechanisms to help prevent entrapment. Check with your equipment vendor to know what safety features are available in your specific MRI department and obtain instructions on how they are utilized should entrapment occur. Remember: Out-swinging MRI system room doors are not affected by the positive pressure. It is especially important that all emergency personnel are restricted from entering the MRI system room with equipment until it is confirmed that the magnetic field has been successfully dissipated, because there may still be a considerable static magnetic field present despite a quench or partial quench of the magnet. In case of a known or suspected injury, notify the imaging center manager immediately and seek medical attention. For asphyxiation: The effect of oxygen deficiency resulting from simple asphyxiants such as nitrogen or helium gas may include: • Rapid or gasping breathing • Fatigue • Diminished mental alertness • Impaired muscular coordination • Faulty judgment • Depression of all senses As asphyxiation progresses, symptoms include: • Nausea • Vomiting • Prostration • Loss of consciousness may result, eventually leading to: • Convulsions • Coma • Death If asphyxiation occurs (generally caused by rapid evaporation of liquid): • Rescue: - If possible and oxygen monitors register >19.5% 02 content in the room, remove the person to air with known oxygen content of 20.9%, but do not enter the area alone - If oxygen monitors register<19.5% 02 content, contact emergency services to initiate rescue with self-contained breathing apparatus 9