MRI Patient Care and Positioning Flashcards

Which vital sign parameter is most critical to monitor during MRI in a sedated pediatric patient?

Answer: Oxygen saturation via MR-compatible pulse oximetry

Continuous oxygen saturation monitoring via MR-compatible pulse oximetry is essential in sedated pediatric patients to detect respiratory compromise caused by sedation.

For MRI of the breast, the patient should be positioned in which orientation?

Answer: Prone with breasts hanging freely in a dedicated bilateral breast coil

Prone positioning with the breasts hanging freely in dedicated bilateral surface coils minimizes motion and maximizes coil coupling for optimal breast MRI.

Gadolinium contrast extravasation at the IV injection site is classified as which type of adverse event?

Answer: Local injection site reaction (extravasation)

Extravasation occurs when contrast leaks from the vein into surrounding tissue; it is a local injection site reaction, not a systemic allergic event.

When performing MRI on a patient with an insulin pump, which step is essential before beginning the exam?

Answer: Remove the pump (if removable) or verify the pump is MR-conditional with the manufacturer before scanning

Insulin pumps may malfunction, heat, or be damaged in the MRI environment; removal or manufacturer verification of MR-conditional status is mandatory.

The landmark for centering an MRI brain exam using a head coil is located at:

Answer: Nasion or bridge of the nose

The nasion (bridge of the nose) is the standard external landmark used to center the isocenter of the MRI system for brain imaging.

Which patient condition requires consultation with the ordering physician regarding MRI safety due to potential risks during the first trimester?

Answer: Known pregnancy, especially first trimester

MRI in the first trimester is performed with caution; although no confirmed harm is established, ACR guidelines recommend physician consultation and clinical justification for first-trimester MRI.