Syndrome of inappropriate antidiuretic hormone ( SIADH)secretion.

Syndrome of inappropriate antidiuretic hormone ( SIADH)secretion.

A nurse is caring for a client in the emergency room after a motor vehicle accident. The client is unconscious with a cervical collar in place. The client has been diagnosed with syndrome of inappropriate antidiuretic hormone ( SIADH)secretion. Which of the following lab values validates the diagnosis?

A. Decreased urine osmolality

B.Increased serum sodium

Decreased glomerular filtration rate

D. Decreased serum sodium