Electrolyte Imbalances Overview
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Questions and Answers

What is the most consistent symptom of both hypernatremia and hyponatremia?

  • Confusion (correct)
  • Irritability
  • Seizures
  • Muscle twitching
  • Which electrolyte imbalance is usually just the result of a water deficit?

  • Hypernatremia (correct)
  • Hyponatremia
  • Hypokalemia
  • Hyperkalemia
  • What stimulates an increase in thirst in response to an increase in plasma osmolality?

  • Glucagon release
  • Insulin release
  • ADH release (correct)
  • Aldosterone release
  • How is hypernatremia usually corrected in symptomatic and severe cases?

    <p>IV 5% dextrose in water</p> Signup and view all the answers

    What is the main factor determining the duration of treatment for hypernatremia?

    <p>Underlying cause</p> Signup and view all the answers

    Which gland is primarily responsible for regulating sodium balance and osmolality?

    <p>Hypothalamus</p> Signup and view all the answers

    What symptom is indicative of mild hyperkalemia?

    <p>Peaked T-waves on ECG</p> Signup and view all the answers

    What electrolyte abnormality can be exacerbated by thiazide diuretics?

    <p>Hypokalemia</p> Signup and view all the answers

    What effect does loop diuretics given with calcium supplementation have on milk-alkali syndrome?

    <p>Increase the risk</p> Signup and view all the answers

    What intracellular change occurs in CNS neurons due to stepwise acute increases in sodium concentration?

    <p>Increase in action potential threshold</p> Signup and view all the answers

    Which electrolyte disturbance has the potential for sudden death from cardiac arrhythmias?

    <p>Hyperkalemia</p> Signup and view all the answers

    What is the most effective means of correcting diuretic-induced hypokalemia?

    <p>Taking potassium chloride pills</p> Signup and view all the answers

    Which ECG change is often seen in patients with hyperkalemia before ventricular arrhythmias?

    <p>Peaked T-waves</p> Signup and view all the answers

    What effect does high calcium administration have on ECG rhythm?

    <p>Sino-atrial block</p> Signup and view all the answers

    What is the range for severe hyperkalemia levels?

    <p>&gt;6.5 mEq/L</p> Signup and view all the answers

    What is one potential effect of intravenous calcium administration?

    <p>Atrial tachyarrhythmias</p> Signup and view all the answers

    Which neurological manifestation is commonly seen in patients with severe acute hypocalcemia?

    <p>Tetany</p> Signup and view all the answers

    What is a potential cardiac consequence of prolonged QT interval in severe hypocalcemia?

    <p>Ventricular arrhythmias</p> Signup and view all the answers

    Which condition may patients with chronic hypocalcemia develop due to the deposition of calcium in the crystalline lens?

    <p>Cataracts</p> Signup and view all the answers

    What is a common renal manifestation of hypercalcemia?

    <p>Polyuria</p> Signup and view all the answers

    Which of the following medications is NOT commonly associated with hypercalcemia?

    <p>Antibiotics</p> Signup and view all the answers

    What physiological process is primarily responsible for maintaining serum calcium levels within a narrow range?

    <p>Parathyroid hormone (PTH)</p> Signup and view all the answers

    What can be a neurological symptom in patients with primary hyperparathyroidism due to compression of adjacent structures by hypertrophied parathyroid glands?

    <p>Weakness</p> Signup and view all the answers

    What are some gastrointestinal symptoms commonly associated with hypercalcemia?

    <p>Nausea</p> Signup and view all the answers

    What ECG finding can be observed in patients with hypomagnesemia?

    <p>ST-segment depression</p> Signup and view all the answers

    How does chronic hypercalcemia contribute to the development of hypertension?

    <p>Vasoconstriction of blood vessels</p> Signup and view all the answers

    What is the primary approach to managing hyperphosphatemia?

    <p>Treatment of underlying disorders and improvement of dialysis</p> Signup and view all the answers

    Which type of phosphate binder is more likely to contribute to a positive calcium balance?

    <p>Calcium-based phosphate binders</p> Signup and view all the answers

    Why is dietary phosphate restriction not a sufficient treatment for hyperphosphatemia?

    <p>All of the above</p> Signup and view all the answers

    What is a significant disadvantage of non-calcium based phosphate binders?

    <p>They are expensive</p> Signup and view all the answers

    Which of the following interventions is most useful for patients with chronic kidney disease?

    <p>Reduction of dialysis intervals</p> Signup and view all the answers

    What is a potential complication of using calcium-based phosphate binders?

    <p>Metastatic calcification</p> Signup and view all the answers

    What is the primary cause of the neurologic symptoms of hyponatremia?

    <p>Cerebral edema</p> Signup and view all the answers

    What is the typical mechanism by which hyponatremia causes cerebral edema?

    <p>Movement of water into brain cells</p> Signup and view all the answers

    What is the primary cause of hypernatremia in hospitalized patients?

    <p>Administration of sodium-containing fluids without adequate free water intake</p> Signup and view all the answers

    What is the primary mechanism that limits the intake of solute and water in healthy humans, preventing hypernatremia?

    <p>Nausea and anorexia</p> Signup and view all the answers

    What is the most common cause of hyponatremia in neurosurgery patients?

    <p>Cerebral salt wasting</p> Signup and view all the answers

    What is the primary cause of the symptoms in hyponatremia?

    <p>Accompanying water load</p> Signup and view all the answers

    What is the typical clinical manifestation of acute hyponatremia?

    <p>Severe symptoms</p> Signup and view all the answers

    What is the primary cause of water retention in hyponatremia?

    <p>Increased ADH levels</p> Signup and view all the answers

    What is the primary cause of free water loss in hypernatremia?

    <p>All of the above</p> Signup and view all the answers

    What is the maximum rate at which hypernatremia can develop without causing serious neurological symptoms?

    <p>Unknown and uncertain</p> Signup and view all the answers

    Which medical condition can be exacerbated by high serum magnesium levels?

    <p>Myasthenia gravis</p> Signup and view all the answers

    What is the main mechanism of action of magnesium in the body?

    <p>Catalyzing intracellular enzyme systems</p> Signup and view all the answers

    Which electrolyte imbalance often occurs alongside hypophosphatemia?

    <p>Hypokalemia</p> Signup and view all the answers

    Which disease state is most commonly associated with hyperphosphatemia?

    <p>Chronic kidney disease</p> Signup and view all the answers

    Which symptom is most commonly associated with hypophosphatemia?

    <p>Paresthesias or confusion</p> Signup and view all the answers

    Which medication can cause an increased loading dose of magnesium?

    <p>Magnesium sulfate paste</p> Signup and view all the answers

    Which electrolyte imbalance is most commonly associated with bradyarrhythmias?

    <p>Hypermagnesemia</p> Signup and view all the answers

    What is the main mechanism of action of phosphate binders in the treatment of hyperphosphatemia?

    <p>Decreasing intestinal absorption of phosphate</p> Signup and view all the answers

    Which disease state is most commonly associated with hypokalemia?

    <p>Diabetic ketoacidosis</p> Signup and view all the answers

    Which electrolyte imbalance is most commonly associated with tingling around the mouth?

    <p>Hyperphosphatemia</p> Signup and view all the answers

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