Which event does NOT indicate that patients should be monitored for radiation injury?

Monitoring for radiation injury is critical in ensuring patient safety during fluoroscopic procedures. The correct choice suggests that a fluoroscopic procedure duration exceeding 30 minutes is not a definitive indicator for monitoring radiation injury.

For context, the other options relate directly to specific calculated doses of radiation that have been established as thresholds warranting close observation for potential radiation injury. The peak skin dose exceeding 3,000 mGy is a recognized threshold where damage to the skin may occur. Similarly, a reference point air kerma exceeding 5,000 mGy signifies a significant exposure to radiation, indicating the patient may be at risk for skin reactions. The kerma area product exceeding 500 Gy x cm² reflects a compounded measure of radiation dose over the area irradiated, indicating a higher risk of injury.

In contrast, although a prolonged fluoroscopic procedure may contribute to increased radiation exposure, the mere length of time does not account for various influencing factors, such as the dose rate and technique used during the procedure. Thus, while watching procedure duration can be an important part of monitoring, it is not a direct metric for assessing potential radiation injury compared to the specific thresholds represented by the other options.