How can the urinary system work in a patient going through dialysis?

Urinary tract and HD: The kidney structures that produce urine are still in place when a patient starts dialysis (d). Patients on dialysis can make urine from the kidney, however as times goes on the urine output decreases and after several years may stop all together. Although the kidney makes urine when patients on d, it's not a high quality urine, as the waste products that need to be eliminated are not, water is.