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Which of the following is a characteristic of syndrome of inappropriate antidiuretic hormone (SIADH)?

A.

Hypernatremia

B.

Increased urine output

C.

Decreased serum sodium levels

D.

Increased serum osmolality

Answer and Explanation

The Correct Answer is C

A. Hypernatremia is not characteristic of SIADH; hyponatremia is more common.
B. Increased urine output is not seen in SIADH; rather, there is decreased urine output.
C. Decreased serum sodium levels (hyponatremia) are a key feature of SIADH due to excessive water retention.
D. Increased serum osmolality is not seen in SIADH; decreased serum osmolality is more characteristic.
 


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Related Questions

Correct Answer is ["18"]

Explanation

To calculate the IV pump setting, first convert the patient's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The patient weighs 195 pounds, which is approximately 88.64 kilograms (195 / 2.2). Next, calculate the total units of Heparin needed per hour by multiplying the patient's weight in kilograms by the dosage ordered: 20 units/kg/hr. So, 88.64 kg * 20 units/kg/hr equals 1,772.8 units/hr. Now, determine how many milliliters per hour this dosage requires. Since the premixed bag contains 25,000 units in 250 ml, there are 100 units per ml (25,000 units / 250 ml). Finally, divide the total units needed per hour by the concentration to find the volume needed per hour: 1,772.8 units/hr / 100 units/ml equals 17.728 ml/hr. Rounded to the nearest whole number, the IV pump should be set to 18 ml/hr.

Correct Answer is C

Explanation

A. Dilute urine is a primary symptom of DI but not a neurologic effect.
B. Hypotension is a cardiovascular effect of DI due to excessive fluid loss.
C. Ataxia, or lack of muscle coordination, can occur due to severe dehydration and electrolyte imbalances affecting the nervous system in DI.
D. Poor skin turgor indicates dehydration but is not a neurologic effect.

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