Electrolyte Imbalance Lecture
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Questions and Answers

A patient presents with muscle weakness, fatigue, and confusion. A BMP reveals a sodium level of 120 mEq/L. Which of the following conditions is most likely?

  • Hyponatremia (correct)
  • Hyperkalemia
  • Hypokalemia
  • Hypernatremia

Which of the following medications is most likely to cause hyperkalemia?

  • Losartan, an ARB
  • Lisinopril, an ACE inhibitor (correct)
  • Hydrochlorothiazide, a thiazide diuretic
  • Furosemide, a loop diuretic

In what way are calcium and phosphate related in the body?

  • They have an inverse relationship, where an increase in calcium often leads to a decrease in phosphate, and vice versa. (correct)
  • Calcium directly stimulates the renal excretion of phosphate.
  • They have a direct relationship, where changes in calcium levels directly correlate with changes in phosphate levels.
  • They are unrelated and do not affect each other's levels.

Which of the following is NOT typically included in a Basic Metabolic Panel (BMP)?

<p>Total Protein (D)</p> Signup and view all the answers

A patient's BMP results show a potassium level of 6.8 mEq/L. Which of the following EKG changes would you most likely observe?

<p>Peaked T waves (C)</p> Signup and view all the answers

A patient's serum creatinine level doubles within a short period. What percentage decrease in Glomerular Filtration Rate (GFR) does this suggest?

<p>50% reduction in GFR (C)</p> Signup and view all the answers

Which of the following conditions would NOT typically cause an increased glucose level as measured in a Basic Metabolic Panel (BMP)?

<p>Starvation (D)</p> Signup and view all the answers

A physician orders a Comprehensive Metabolic Panel (CMP) instead of a Basic Metabolic Panel (BMP). What additional information will the CMP provide?

<p>Liver function tests (C)</p> Signup and view all the answers

Blood Urea Nitrogen (BUN) levels reflect the health of which two organs?

<p>Liver and Kidneys (A)</p> Signup and view all the answers

A patient's Basic Metabolic Panel (BMP) reveals an elevated creatinine level. This result is directly proportional to what?

<p>Renal excretory function (A)</p> Signup and view all the answers

Why is creatinine considered a useful filtration marker for estimating Glomerular Filtration Rate (GFR)?

<p>Its levels are stable due to consistent skeletal muscle volume. (A)</p> Signup and view all the answers

Which of the following is NOT a component of the Basic Metabolic Panel (BMP)?

<p>Magnesium (A)</p> Signup and view all the answers

Urea formation in the liver is a process that involves the breakdown of ingested proteins into amino acids, followed by catabolism to form ammonia. What is ammonia then converted into?

<p>Urea (D)</p> Signup and view all the answers

Flashcards

Basic Metabolic Panel (BMP)

A set of blood tests that give an overview of your body's metabolism and electrolyte balance.

Hypernatremia

Too much sodium in the blood; causes thirst, confusion.

Hyponatremia

Too little sodium in the blood; causes nausea, headache, confusion.

Medication causes of Hyperkalemia

Medications can impair sodium excretion (NSAIDs, etc), or cause potassium to shift from inside cells to the blood.

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Calcium and Phosphate Relationship

Calcium and phosphate have an inverse relationship; when calcium levels are high, phosphate levels are usually low, and vice versa.

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Bicarbonate (HCO3-)

An electrolyte that is measured in the BMP to assess electrolyte balance.

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Creatinine

A waste product from muscle activity, filtered by the kidneys, used to estimate GFR.

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Creatinine Reference Range

Normal range: 0.5 – 1.1 mg/dL for females, and 0.6 – 1.2 mg/dL for males

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Blood Urea Nitrogen (BUN)

Waste product formed in the liver from protein breakdown, excreted by the kidneys.

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Normal BUN Range

Normal range: 10-20 mg/dL (adults)

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Glucose

Sugar regulated by insulin and glucagon; levels must be evaluated with respect of mealtime.

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Glycosylated Hemoglobin (HbA1c)

Follow-up test for elevated glucose, measures average blood sugar over 2-3 months.

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