What causes dialysis patients urine to be so dark? why do they stop making urine after long term dialysis?

Dialysis dark urine: 34 F asks why do dialysis pats have dark urine and why do they stop making urine. ANS: urine is the remains of the fluid filtered at the glomerulus. As glomeruli are destroyed by the disease colored chemicals that normally go out in the urine build up in blood-thus the funny skin color. This color stays in the urine so dark. Eventually all glomeruli die from the cause and no urine Is formed.