Have you ever fitted a patient with a hearing aid, and it went wrong? Maybe the device did not work properlly?

If you don't have a story to share on this topic just tell the interviewer how you would handle the situation. Because technology can fail sometimes you will keep an open relationship with the patient and let them know that they can come back if a problem arises. You'll address the situation calmly as to not upset the patient if they are already upset or irritated.

Community answers are written by other candidates practicing this set. Reading how others frame the same question is one of the fastest ways to sharpen your own.