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1st September 2020
A 63-year-old man presents to the emergency department with confusion
A 63-year-old man presents to the emergency department with confusion. His wife says that he has not been eating much over the past few days, though he has been drinking a lot. She also mentions that he has been passing more urine than usual over this time.
On examination, his mucous membranes appear quite dry. Aside from his confusion, your neurological examination yields normal results.
His blood results are as follows:
| Baseline | Current | |
|---|---|---|
| Sodium (mmol/L) | 137 | 142 |
| Potassium (mmol/L) | 3.9 | 4.0 |
| Urea (mmol/L) | 2.6 | 4.4 |
| Creatinine (μmol/L) | 70 | 97 |
For the patient above, please select the SINGLE most likely cause of his symptoms. Select ONE option from the list above.
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