Patient Safety and Radiation Management Flashcards

What does the radiation safety acronym ALARA stand for?

Answer: As Low As Reasonably Achievable

ALARA (As Low As Reasonably Achievable) is the foundational radiation protection principle requiring use of the lowest dose that achieves the clinical objective.

Which strategy is most effective at reducing radiation dose in the EP lab?

Answer: Minimizing fluoroscopy time and using beam collimation

Minimizing fluoroscopy time, collimating the X-ray field to the region of interest, and using pulsed low-frame-rate fluoroscopy are the most impactful dose reduction strategies.

Standard 0.5 mm lead equivalent aprons typically attenuate scattered radiation by approximately?

Answer: 90–95%

Standard lead aprons attenuate approximately 90–95% of scattered radiation at diagnostic X-ray energies, substantially reducing operator dose.

What is the US regulatory annual occupational whole-body radiation dose limit for EP lab staff?

Answer: 50 mSv/year

The NRC and NCRP set the annual occupational whole-body effective dose limit at 50 mSv (5 rem) per year for radiation workers.

Where should the primary dosimeter badge be worn by EP lab personnel?

Answer: At collar level outside and above the lead apron

The collar dosimeter above the lead apron measures unshielded head, neck, and eye dose, providing the most meaningful estimate of radiation exposure for EP staff.

Zero-fluoroscopy catheter ablation relies primarily on which technology to navigate catheters without X-ray?

Answer: Electroanatomic mapping systems

Zero-fluoroscopy ablation uses electroanatomic mapping systems such as CARTO to navigate and position catheters using magnetic or impedance-based tracking without X-ray.