Following injection of ADH,a patient has a serum osmolality of 290 mOsm and a urine osmolality of 450 mOsm.The patient:
A) Continued to observe water deprivation
B) Lacks tubular response to ADH
C) May have ingested excess alcohol
D) Should be evaluated with a creatinine clearance

Question

Quizplus · Accepted Answer

A lack of tubular response to ADH is indicated by a low urine osmolality, despite the injection of ADH. In this case, the urine osmolality is higher than the serum osmolality, indicating a lack of response to ADH. This may suggest a problem with the kidneys' response to ADH, such as diabetes insipidus.

Following Injection of ADH,a Patient Has a Serum Osmolality of 290