A nurse is initiating a peripheral venous access IV infusion ordered for a patient presurgically. In what position would the nurse place the patient to perform this skill?

Correct Answer: B

Rationale: Low Fowler's position (semi-sitting) aids vein access and patient comfort.

Correct Answer: A

Rationale: SIADH is characterized by euvolemia or hypervolemia, not hypovolemia.

Correct Answer: D

Rationale: Hypomagnesemia typically causes hypocalcemia, not hypercalcemia.

Correct Answer: D

Rationale: In chronic respiratory acidosis, HCO3 rises by 3-4 mmol/L per 10 mmHg pCO2 increase, not 2.

Correct Answer: C

Rationale: Normal anion gap is typically 8-12 mmol/L, so <18 is the most accurate range here.