In a client with syndrome of inappropriate antidiuretic hormone (SIADH), which lab finding signifies that the condition is resolving?

In a patient with syndrome of inappropriate antidiuretic hormone (SIADH), the body retains water due to excess levels of antidiuretic hormone (ADH), leading to dilutional hyponatremia and concentrated urine. When assessing whether SIADH is resolving, one key indicator is urine specific gravity, which reflects the concentration of solutes in the urine.

A urine specific gravity of 1.020 indicates that the urine is becoming less concentrated, which is a favorable sign in the context of SIADH. Typically, in SIADH, urine specific gravity levels are higher than normal (often above 1.030), due to the body's inability to excrete excess water. Therefore, as the condition improves, you would expect to see a decrease in urine specific gravity towards the normal range (approximately 1.010 to 1.025).

While a serum sodium level of 140 mEq/L is within the normal range, it does not specifically indicate the resolution of SIADH. Similarly, urine output of 300 mL/hour can be misleading as output can vary based on fluid intake and other factors; it does not directly relate to the resolution of SIADH. A blood urea nitrogen level of