A 19-year-old woman is brought to the emergency department by her rommate after she found her unconscious. Her rommate reports that she has been training for a marathon since the beginning of the summer. She is alert and oriented but becomes irritable when realizing that she is at a hospital and refuses to answer questions. She appears tired. She is 170 cm (5 ft 7 in) tall and weighs 51 kg (112 lb). Her temperature is 35.5°C (96°F), pulse is 44/min, respirations are 20/min, and blood pressure is 84/48 mm Hg. Examination shows dry, scaly skin and dry mucous membranes. Urine screening for diuretics reveals a large amount of furosemide. Which of the following sets of laboratory findings would most likely suggest that this patient is abusing furosemide to lose weight?

Question

A 19-year-old woman is brought to the emergency department by her rommate after she found her unconscious. Her rommate reports that she has been training for a marathon since the beginning of the summer. She is alert and oriented but becomes irritable when realizing that she is at a hospital and refuses to answer questions. She appears tired. She is 170 cm (5 ft 7 in) tall and weighs 51 kg (112 lb). Her temperature is 35.5°C (96°F), pulse is 44/min, respirations are 20/min, and blood pressure is 84/48 mm Hg. Examination shows dry, scaly skin and dry mucous membranes. Urine screening for diuretics reveals a large amount of furosemide.  Which of the following sets of laboratory findings would most likely suggest that this patient is abusing furosemide to lose weight?

Quizplus · Accepted Answer

Eductional Objective: Overuse or abuse of loop diuretics (eg, furosemide) characteristically causes hypokalemic, hypochloremic metabolic alkalosis. Urine electrolyte findings depend on how recently the diuretic was last ingested; increased urine Na+, Cl-, and K+ are expected with recent ingestion.

A 19-Year-Old Woman Is Brought to the Emergency Department by Her