Dialysis is used when which of the following fails?

Dialysis is a medical treatment utilized when the kidneys are no longer functioning adequately to filter waste, excess fluids, and electrolytes from the blood. This situation typically arises in cases of kidney failure, where the kidneys can no longer perform their essential role due to various conditions such as chronic kidney disease, acute kidney injury, or other significant health issues. The primary aim of dialysis is to replicate some of the filtering functions normally carried out by healthy kidneys, thus preventing the buildup of harmful substances in the body that could lead to serious health complications.

While the intestines, bloodstream, and stomach are important for digestive and circulatory functions, they are not the organs directly involved in the filtration and elimination of waste products from the body. In the context of dialysis, the focus is specifically on the kidneys and their failure to perform these critical functions.