Hello,
Well dialyzed patients who have been on dialysis for some time, should not get generally get confused between dialysis treatments (related to re-accumulation of toxins).
To answer your questions, many dialysis patients, especially if they have not been on dialysis for long, may continue to make significant amounts of urine. While not all will retain this residual renal function, it would not be unusual for patients to maintain a seemingly normal amount of urinary volume for some time. And so yes, in such cases, patients will continue to fill and distend their bladder. Pain in the bladder region would have the same differential diagnosis as in non-dialysis patients (retention, cystitis etc).
We hope this is helpful.
Jordan
Dr. Jordan Weinstein, MD
Division of Nephrology, St. Michael's Hospital
Assistant Professor of Medicine
University of Toronto
Director, UKidney.com