(553) Management of Sodium Disorders

1. Which of the following molecules does NOT affect the effective plasma osmolality?

A. Sodium

B. Chloride

C. Urea

D. Glucose

2. In which of the following diseases, do dogs with hyponatremia ([Na+]serum = 130 mmol/L) have high urine sodium concentration ([Na+]urine > 30 mmol/L)?

A. Syndrome of inappropriate ADH secretion

B. Congestive heart failure without diuretics

C. Gastrointestinal fluid loss

D. Psychogenic polydipsia

3. In which of the following conditions, may osmotic demyelination syndrome occur?

A. After rapid correction of chronic non-symptomatic hypernatremia

B. After slow correction of acute non-symptomatic hyponatremia

C. After rapid correction of acute non-symptomatic hypernatremia

D. After rapid correction of chronic non-symptomatic hyponatremia

4. You have a dog with hypovolemic shock and chronic asymptomatic hyponatremia ([Na+]serum = 125 mmol/L). Which of the following fluids would you use for fluid resuscitation in this dog?

A. 5% dextrose ([Na+] = 0 mmol/L)

B. Lactated Ringer’s solution ([Na+] = 130 mmol/L)

C. 0.9% sodium chloride ([Na+] = 154 mmol/L)

D. 7.2% hypertonic saline ([Na+] = 1,232 mmol/L)

5. You have a 30 kg dog with chronic asymptomatic hypernatremia ([Na+]serum = 180 mmol/L). What is the calculated water deficit of this dog (normal [Na+]serum = 145 mmol/L)?

A. 3.6 L

B. 4.3 L

C. 14.5 L

D. 22.3 L

(553) Management of Sodium Disorders

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