What Causes Difficulty In Emptying The Bladder Completely?

I need a urologist as I had urinary diversion using appendix and have a stoma to cath, r there really a yes obstructive urologists in ri, as I had dr.young Kim who is no longer around now I am stuck as black ladder does not empty completely, causing very frequent infections, I am also oral antibiotic resistant.are there any reconstructive urologists at ri hosp.sorry I cannot afford to pay u