no need to worry about it, you would not get any kidney problems primarily because of the needle prick. You need to look at the health records of your uncle, whether he got any hepatitis C or B virus positive, of course, the HIV. if any one is positive, then you may have to consult a physician nearby and have to undergo the necessary tests. If you are worried too much, you can do Serum tests for the following : HbsAg, Anti Hcv viral antibodies and HIV Elisa test.