If a hearing-impaired patient is having a difficult time understanding questions, then it is required to ensure that patient's hearing aid is correctly turned on.
The expression 'hearing-impairment' makes reference to audition problems that many times can be solved by using medical devices designed to recover audition.
In conclusion, if a hearing-impaired patient is having a difficult time understanding questions, then it is required to ensure that patient's hearing aid is correctly turned on.
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