The function of the kidneys includes filtering the wastes and fluids that maintains the levels of chemical substances in the blood. However, kidney failure may occur due to several causes, such as infections, medications, cardiovascular disease, allergic reactions, and liver diseases. In such cases, the kidney is unable to perform its functions. In such cases, an external procedure is required to complete the role of the kidney. This process of filtering the blood with out-of-body assistance is known as dialysis.