In these cases, dialysis is required. Dialysis is a process in which the toxins are removed and the electrolyte balance restored by a machine.
In order to perform this role, the dialysis machine requires access to the blood system. This may be achieved in a number of ways.
Access to the body can be achieved through a Tenckhoff catheter placed in the abdomen. This type of access requires more frequent dialysis of a different type.
Access directly to the blood can be achieved with a permacath, which is usually placed into the veins in the lower neck/upper chest. Despite its name, it is usually considered to be a temporary solution.