Endocrinology MCQ Answer 041
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The Correct Answer is D.Excessively hypotonic (Dilute) urineSIADH is a condition characterized by serum hypo-osmolality and hyponatremia, resulting from secretion of antidiuretic hormone (ADH). The patient may be at risk when serum Na falls below 135 meq/l; mild to moderate risk when serum Na is 120 meq/l to 110 meq/l; and severe risk when Na is less than 110 meq/l.
Features of SIADH include low serum sodium and low serum osmolality, increased urine as well as osmolality and increased urinary sodium concentration (> 20 mmol/L). Clinically, most patients with SIADH are euvolemic.
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