What urine specific gravity value is typically expected in a patient with SIADH?

In the context of Syndrome of Inappropriate Antidiuretic Hormone secretion (SIADH), the urine specific gravity is typically elevated due to the excessive retention of water, which dilutes the serum sodium concentration. Patients with SIADH tend to have concentrated urine because the body inappropriately produces antidiuretic hormone (ADH), leading to increased reabsorption of water in the kidneys.

The normal range for urine specific gravity is approximately 1.005 to 1.030. A value of 1.035 indicates that the urine is very concentrated, which aligns with the pathophysiology of SIADH. This condition causes the body to retain excess water, resulting in a high concentration of solutes in the urine, reflected by a higher specific gravity value.

Therefore, a urine specific gravity of 1.035 is expected in a patient with SIADH, as it reflects the concentrated nature of their urine caused by the inappropriate action of ADH.