Certified Nurses Operating Room (CNOR) Practice Exam

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What are the three principles of radiation protection?

Time, distance, and transparency

Time, distance, and shielding

The three principles of radiation protection are time, distance, and shielding.

Time refers to minimizing the amount of time spent near a radiation source, which reduces exposure. The longer an individual is exposed to radiation, the greater the dose received, so reducing exposure time is crucial for safety.

Distance involves maximizing the distance from the radiation source. Radiation intensity diminishes with increasing distance, meaning that standing further away from the source significantly lowers exposure levels.

Shielding is the use of materials to block or absorb radiation. Different types of radiation require different shielding materials (e.g., lead for X-rays or gamma rays, thick plastic for beta particles) to effectively reduce the radiation exposure to safe levels.

Together, these three principles are fundamental in radiation safety protocols and practices, aiming to protect healthcare professionals and patients from the harmful effects of radiation exposure.

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Time, speed, and shielding

Distance, exposure, and shielding

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