Why do you have to give D5W solution if kidney is in failure and urine output is low?

D5W (5% dextrose in water) is often administered in cases of kidney failure with low urine output to provide a source of calories and maintain energy levels, especially when oral intake is inadequate. Additionally, it can help to prevent dehydration and maintain osmotic balance. In some cases, it may also aid in promoting urine production by providing a non-electrolyte fluid that can be utilized by the body. However, careful monitoring is essential to avoid fluid overload and complications.