Safety Policies for Pregnant Patients and Healthcare Personnel Flashcards
6 cards from real MRSO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Safety Policies for Pregnant Patients and Healthcare Personnel flashcards as text
According to ACR guidelines, what is the recommended policy for pregnant healthcare personnel regarding access to the MRI scan room (Zone IV)?
Answer: They are permitted in Zone IV but should exit the room during active data acquisition.
Pregnant healthcare workers are permitted to enter all MRI zones, including Zone IV. However, it is recommended they exit the scan room during active scanning (when RF and gradient fields are active) to avoid exposure to time-varying magnetic fields and RF energy as a precautionary measure.
What is the primary reason for caution when considering an MRI for a patient in the first trimester of pregnancy?
Answer: This is the period of major organogenesis, making the fetus theoretically more vulnerable.
The first trimester is the period of organogenesis, where the major organs of the fetus are developing. While no definitive harmful effects have been proven, this is considered the most vulnerable stage of development, prompting a cautious risk-versus-benefit assessment before proceeding with an MRI.
Under which circumstance is the administration of a gadolinium-based contrast agent (GBCA) to a pregnant patient generally considered?
Answer: When the potential benefit to the mother or fetus outweighs the potential risk.
The ACR Manual on Contrast Media states that GBCAs should be avoided during pregnancy. However, they may be considered if the diagnostic information is essential for the health of the patient or fetus and cannot be acquired through non-contrast MRI or other imaging modalities. This requires a thorough risk/benefit discussion and documented informed consent.
What is the most critical piece of documentation required before performing an MRI on a known pregnant patient?
Answer: A documented informed consent discussing potential risks and benefits.
A comprehensive informed consent process is paramount. This involves a detailed discussion with the patient about the current understanding of MRI safety in pregnancy, the potential (though unproven) risks, the benefits of the exam, and alternative imaging options. This discussion and the patient's consent must be thoroughly documented.
The primary safety concerns for the fetus during an MRI examination are related to which two physical phenomena?
Answer: RF energy deposition and acoustic noise.
The main theoretical concerns for the developing fetus are the effects of radiofrequency energy deposition, which can cause tissue heating (measured by SAR), and the high levels of acoustic noise generated by the rapidly switching gradient coils. The static magnetic field itself is not considered a significant risk.
If a healthcare worker discovers they are pregnant, what is the most appropriate first step regarding their MRI work duties?
Answer: Voluntarily declare the pregnancy to their employer/MRSO.
The first and most important step is to declare the pregnancy to their employer or the MRSO. This allows the facility to review its policies, provide appropriate education on the risks, and ensure the employee understands the recommendation to exit the scan room during active scanning, without obligating them to do so.