The doctor said even if they operate, my hearing will never be the same as it used to be.
The doctor told me my hearing will never be as good as it was even if they were to operate.
この場合、どちらを使っても言えますよ！
The doctor said ...を使った場合：
ーThe doctor said even if they operate, my hearing will never be the same as it used to be.
「医者は手術をしても私の聴力は以前と同じにはならないと言った」
The doctor told me ... を使った場合：
ーThe doctor told me my hearing will never be as good as it was even if they were to operate.
「医者は手術したとしても私の聴力は以前と同じくらい良くはならないと言った」
ご参考まで！
カナダ 
