MRSO - Implants and Devices - Module 5

MR screening should be - ANSWER--verbal and interactive -performed by Level 2 MR Personnel MR screening should not be - ANSWER-simplified Who defines terms for marking medical devices in MR environment? - ANSWER-ASTM According to ASTM, MR Safe is applied to items that: - ANSWER-Items that pose no known hazard in ANY MR environment Ex: wood, glass, plastic According to ASTM, MR Unsafe is applied to items that: - ANSWER-Item that poses unacceptable risk in MR environment According to ASTM, MR Conditional is applied to items that: - ANSWER-Item that has demonstrated safety within the MR environment within defined conditions Categories of devices - ANSWER-passive active: contain electrical components Metallic implants are subjected to: - ANSWER--static magnetic field interactions -heating (RF, gradients): length / loops -induced currents (gradients) -operational -artifacts Workflow for implants: - ANSWER--identify device -determine FDA labeling -If conditional, determine if conditions can be maintained If item can't be identified or labeling can not be determined, risk vs benefit is determined by - ANSWER-radiologist Procedures when determining implant assessment should be - ANSWER-documented in writing Conditions regarding safety and compatibility applies only to - ANSWER-specifically tested conditions If safety or compatibility of a device is not documented in writing, one should - ANSWER-never assume safety information