The difference between secondary and tertiary hemodialysis is the adequacy of dialysis. It is generally recommended to dialyze three times a week for four hours each time, and the specific frequency of dialysis should be assessed according to the residual renal function, urine output, biochemical indexes and complications.
Hemodialysis can remove toxins and excess water from the body to achieve water, electrolyte and acid-base balance disorders and relieve corresponding clinical symptoms. If the patient has partial residual renal function or urine output >500ml/day, dialysis can be performed twice a week for 4 hours each time.
If the above criteria are not met, and water control is poor, hyperkalemia, nausea and vomiting, anorexia, edema and other complications are more, dialysis should be performed three times a week, 4 hours each time, and the frequency of dialysis should be increased as appropriate according to the indicators such as Kt/V (urea clearance index) and URR (urea reduction rate).
The frequency and duration of dialysis should be considered according to the condition, and it is recommended to communicate with the doctor of the dialysis center and carry out the treatment under the doctor’s guidance.