Dialysis fluid is injected into the abdominal cavity during peritoneal dialysis, where the peritoneal lining functions as a natural filter. Patients can be independent when administering PD at home, although a storage room for dialysis supplies is required. PD patients are mostly at risk for peritonitis. In contrast, hemodialysis involves pumping blood out of the body, cleaning it, and then putting it back into a machine. HD treatments run several hours each and are usually conducted three times a week in a hospital environment. A dialysis catheter, or fistula, is used to get access to the bloodstream. Compared to PD patients, HD patients frequently have stricter hydration limits and may feel queasy or lightheaded during sessions.