A 58-year-old woman with past medical history of alcohol abuse and bipolar schizophrenia presents to the hospital after a fall complicated by numerous rib fractures seen on chest x-ray. She is currently not taking any medications. On physical examination, her temperature is 37.1°C, blood pressure is 138/88 mm Hg, pulse rate is 99 beats/min, and respiratory rate is 14 breaths/min, oxygen saturation is 95% on room air. Her neurological, cardiovascular, and abdominal examinations are normal. She exhibits tenderness to palpation over the left chest wall with decreased bibasilar breath sounds. Her chemistry panel is as follows:
What is the MOST appropriate management of her hyponatremia?A. Conivaptan
Correct Answer: D
This patient’s hyponatremia is due to low solute intake associated with increased consumption of beer which is also known as beer potomania. Beer is low in solutes and electrolytes. Excessive consumption with an otherwise nutritionally poor diet leads to impaired water clearance and therefore dilutional hyponatremia. Typical laboratory findings include low urine sodium, low urine osmolality, and low ADH levels. However, it should be noted, that the concomitant use of diuretics can make the diagnosis of beer potomania more difficult as diuretics will cause increased sodium excretion in urine and thus result in higher than expected urine sodium and osmolality concentrations.