The first concern that immediately pops up is the fact that bone conduction was not performed for the right ear, and therefore we dont know the sensory function is of either ear, as that would be the "better" sensory / cochlear response that was recorded for the left bone conduction.
So with this in mind, we dont know whether the 30dB loss in the right is sensory or conductive in nature.
For noise exposed individuals it is also recommended that they test 3kHz and 6kHz as well.
I am hesitant to say it will improve, unless its conductive in nature. In the 20 years of practice I have never seen an improvement in sensory thresholds, only when there is a conductive hearing loss (i.e. middle ear or outer ear pathology which then resolves after treatment).
I am more likely to say that the hearing loss will either remain stable, or will deteriorate as you get older. Each person is very different when experiencing perceived hearing difficulty - some profoundly deaf individuals cope so well with lipreading etc that they have no perceived difficulty, while those with mild loss in more demanding listening jobs have experienced severe "handicap" with only a mild loss. So it is difficult to answer that question for you, and would rather ask you to monitor how YOU cope on a daily basis and whether you are battling or coping.
I have never heard of improving blood flow to the corti in any specific way, apart from removing factors that may have hindered blood flow, for example high blood pressure, cholesterol, improving blood flow in general by healthy eating habits, not smoking, drinking water etc.
I would certainly recommend careful and close monitoring.
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