Final Answer:
Dialysis is needed when approximately 85% or more of kidney function is lost.
Step-by-step explanation:
Dialysis becomes necessary when a significant portion of kidney function is compromised, typically around 85% or more. The kidneys play a vital role in filtering waste products and excess fluids from the blood, maintaining electrolyte balance, and regulating blood pressure. As kidney function declines, waste products accumulate in the body, leading to a range of complications. When kidney function drops to approximately 15% or less, a critical threshold is reached, necessitating the initiation of dialysis.
Dialysis serves as a life-sustaining intervention by artificially performing the filtration and regulation functions of the kidneys, removing waste products and excess fluids from the bloodstream to maintain overall health and prevent complications associated with kidney failure.