What does isothenuric urine signify?

Isothenuric urine signifies that the urine has a specific gravity close to that of plasma, typically around 1.010. This condition indicates that the kidneys are not concentrating or diluting the urine effectively, which can occur in situations like kidney disease or when the body is unable to respond appropriately to changes in hydration status. It suggests a loss of kidney function or an inability to regulate water balance in the body.