MRI Device Labeling and Testing

According to the 2009 FDA labeling system, what does the designation "MRI Conditional" mean?. The device is safe in all MRI environments. The device is unsafe in all MRI environments. The device is safe only under specific, defined MRI environments. The device requires a cardiologist to be present during the scan.

Where should you look up the safety status of an implant if the model’s name or number is known?. The local hospital's internal directory. MRIsafety.com or the manufacturer’s website. A standard Google search for news articles. The patient’s insurance provider portal.

How long should a patient typically wait after the placement of arterial stents or IVC filters before undergoing an MRI?. 24 hours. 1 to 2 weeks. 6 to 8 weeks. At least 6 months.

Why are bullets, shrapnel, and metallic fragments considered "MRI unsafe" and a contraindication?. They cause too many artifacts to see anything. They are always too large for the MRI bore. They may be near vital structures like eyes, heart, or arteries. They contain radioactive material that reacts with the magnet.

What action is required for a patient with a cochlear implant before they enter the MRI room?. The entire implant must be surgically removed. The battery should be removed, and the implant should be wrapped. The patient must wear noise-canceling headphones over the implant. No action is required as all cochlear implants are MRI Safe.

Which type of contraceptive device is considered "MRI safe" because it contains no metal?. Copper IUDs. Steel IUDs. Subdermal implants. Intrauterine devices used in China.

Why must drug infusion pumps and drug patches be removed before an MRI?. They block the radiofrequency signals. Risk of device malfunction and thermal injury (burning). The medication inside will become toxic. They are too heavy for the MRI table.

Which specific models of penile prostheses are noted as "unsafe" due to the risk of displacement or torque injury?. Titanium and Platinum models. Dura-phase and Omni-phase. Plastic and Silicone models. All penile prostheses are unsafe.

In what scenario can permanent makeup or tattoos cause minor skin burning during an MRI?. If the tattoo is less than one year old. If the ink is blue or green. If the pattern is dark or curved (e.g., circling a limb). Burning only occurs if the patient is sweating.

Why do permanent dental implants and certain orthopedic plates/screws generally not pose a movement hazard, even if they are ferromagnetic?. They are demagnetized before surgery. They are covered in a special plastic coating. They are securely fixed to the bone or surrounding teeth. The MRI magnet is not strong enough to pull them.