new_n_lost
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A 65-year-old man with mild heart failure is treated with a loop diuretic. A few days later the man complains of muscle weakness. Laboratory results are shown below.
Arterial PCO2: 48 mm Hg
Arterial pH: 7.49
Plasma HCO3-: 35 mEq/L
Which of the following is most likely decreased in this man?
A. Plasma aldosterone
B. Plasma potassium
C. Potassium excretion
D. Renin secretion
E. Sodium excretion
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| SILVER
NOTHING BUT BOLT!
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B. Plasma potassium
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| medocuk
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B. Plasma potassium
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| drhouse
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B
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| GOGETA
I'm Dr. GOGETA
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I will go with B
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| new_n_lost
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| new_n_lost
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Wht is this Person Having ???
a) Metabolic Alkalosis
b) Metabolic Acidosis
c) Respiratory Alkalosis
d) Respiratory Acidosis
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| drhouse
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A
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| medocuk
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Metabolic alkalosis A:
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| new_n_lost
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Bang On Right !!!! Guys Good Job
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| new_n_lost
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The correct answer is B.
The data shown in the table indicate that the man has developed metabolic alkalosis (increased PCO2, pH, and HCO3-), which occurs commonly with overuse of diuretics (thiazides and loop diuretics).
The overuse of a loop diuretic increases the excretion of sodium (choice E) and potassium (choice C) by the kidneys.
The increase in potassium excretion leads to a decrease in plasma potassium levels (choice B).
The decrease in plasma potassium stimulates aldosterone secretion, which raises plasma aldosterone levels (choice A).
The sodium depletion stimulates renin secretion (choice D), which in turn raises angiotensin II levels in the plasma (which also stimulates aldosterone secretion.
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| kingusmle
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B ..Pottassium...without peeping
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