An 80-year old woman was admitted for nausea, headache, and psychosis for 2 days: Past medical history includes hypertension, and her physician increased hydrochlorothiazide (HCTZ), from 12.5 to 25 mg daily. The patient was drinking water more than usual. Her BP was 120/70 mmHg and pulse rate of 80 beats/min. There were no orthostatic BP and pulse changes. Serum chemistry: Na* 112 mEq/L, K* 3.2 mEq/L, CI- 90 mEq/L, and glucose 90 mg/dL. The urine osmolality is 220 mOsm/kg H,O. She weighs 70 kg. Which one of the following statements regarding her hyponatremia is CORRECT? A. Furosemide rather than HCTZ is a frequent cause of hyponatremia. B. HCTZ impairs urine concentrating capacity C. Electrolyte-free H,O clearance decreases with HCTZ D. Electrolyte-free H,O clearance increases with HCTZ E. None of the above
An 80-year old woman was admitted for nausea, headache, and psychosis for 2 days: Past medical history includes hypertension, and her physician increased hydrochlorothiazide (HCTZ), from 12.5 to 25 mg daily. The patient was drinking water more than usual. Her BP was 120/70 mmHg and pulse rate of 80 beats/min. There were no orthostatic BP and pulse changes. Serum chemistry: Na* 112 mEq/L, K* 3.2 mEq/L, CI- 90 mEq/L, and glucose 90 mg/dL. The urine osmolality is 220 mOsm/kg H,O. She weighs 70 kg. Which one of the following statements regarding her hyponatremia is CORRECT? A. Furosemide rather than HCTZ is a frequent cause of hyponatremia. B. HCTZ impairs urine concentrating capacity C. Electrolyte-free H,O clearance decreases with HCTZ D. Electrolyte-free H,O clearance increases with HCTZ E. None of the above
Chapter23: Pediatric Intravenous Medications
Section: Chapter Questions
Problem 30SST
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Transcribed Image Text:An 80-year old woman was admitted for nausea, headache, and psychosis for 2 days: Past medical history includes
hypertension, and her physician increased hydrochlorothiazide (HCTZ), from 12.5 to 25 mg daily. The patient was
drinking water more than usual. Her BP was 120/70 mmHg and pulse rate of 80 beats/min. There were no orthostatic BP
and pulse changes. Serum chemistry: Na* 112 mEq/L, K* 3.2 mEq/L, CI- 90 mEq/L, and glucose 90 mg/dL. The urine
osmolality is 220 mOsm/kg H,O. She weighs 70 kg. Which one of the following statements regarding her
hyponatremia is CORRECT?
A. Furosemide rather than HCTZ is a frequent cause of hyponatremia.
B. HCTZ impairs urine concentrating capacity
C. Electrolyte-free H,O clearance decreases with HCTZ
D. Electrolyte-free H,O clearance increases with HCTZ
E. None of the above
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