Nightly hemodialysis sessions (6 to 8 hours, 3 to 6 days / week) and short (1.5 to 2.5 hours) daily sessions, when available, are used selectively for patients who have any of the following: Excessive fluid gain between dialysis sessions Frequent hypotension during dialysis Poorly controlled blood pressure Hyperphosphatemia that is otherwise difficult to control These daily sessions are most economically feasible if patients can do hemodialysis at home.