Clin Chem Electrolytes Quiz #12
Given the following results, what condition does the patient have? Patient is obese, has a history of poor wound healing, has a moon face and buffalo hump. Na+ =increased, K+ = decreased, Glucose = elevated
Cushing's disease
Which of the following conditions is associated with hypernatremia? A. Hypoaldosteronism B. Diabetes insipidus C. Diarrhea D. Burns
Diabetes insipidus
Which of the following conditions is most likely to produce an elevated plasma potassium? A. Hypoparathyroidism B. Digitalis overdose C. Diarrhea D. Cushing's syndrome
Digitalis overdose
Sodium determination by indirect ISE is falsely decreased by:
Elevated lipid levels
What is the usual percentage of ionized Ca2+?
45-50%
Which of the following does NOT have an effect on plasma calcium levels? A. PTH B. Vitamin D C. Aldosterone D. Calcitonin
Aldosterone
What condition is associated with hypokalemia?
Alkalosis
Which of the following are part of the extracellular fluids? A. Plasma B. Lymph fluid C. CSF D. All the above
All the above
What's the usual relationship of calcium and phosphate?
Calcium and phosphate have an inverse relationship
What hormone controls the levels of serum calcium?
PTH (parathyroid hormone)
If you received the following results, what would you do? Na+ =140 mmol/L K+ = 3.5 mmol/L Cl- =103 mmol/L HCO3- = 35 mmol/L
Repeat the electrolytes
Dehydration, diarrhea, hyperventilation and impaired renal function all have one thing in common:
Hypernatremia
Which of the following does NOT cause an increased anion gap? A. Hypoalbuminemia B. Hypocalcemia C. Hypomagnesemia D. Hypokalemia
Hypoalbuminemia
Which of the following does have an effect on plasma calcium levels? A. Sodium B. Potassium C. Iron D. Inorganic phosphate
Inorganic phosphate
A patient who has increased calcium may develop what condition?
Kidney stones
Which of the following is NOT a typical finding in magnesium deficiency tetany? A. Low serum calcium level B. Low serum potassium level C. Normal blood pH value D. Low serum phosphate level
Low serum phosphate level
T/F: Calcium which is normally present in serum must be chemically eliminated so that it will not cause interference when measuring serum magnesium.
True
The method used for potassium is:
Valinomycin membrane
What is one of the major causes of an artificially increased potassium?
Hemolysis
What is the most common method used to measure sodium and potassium?
ISE (Ion Selective Electrodes)