How urea is excreated when kidney fails?

When the kidneys fail, they are unable to effectively filter waste products from the blood, including urea. As a result, urea accumulates in the bloodstream, a condition known as uremia. In severe cases, patients may require dialysis to artificially remove urea and other waste products from their blood, or they may need a kidney transplant to restore normal kidney function. Without treatment, high levels of urea can lead to serious health complications.