Which IV fluid is most appropriate for a patient experiencing severe dehydration?
0.45% NaCl
3% NaCl
Lactated Ringer's
D5W
The Correct Answer is C
(A) 0.45% NaCl (Hypotonic Fluid): Used for mild dehydration but can cause fluid shifts leading to cerebral edema.
(B) 3% NaCl (Hypertonic Fluid): Used for severe hyponatremia, not dehydration.
(C) Lactated Ringer’s (LR): This isotonic fluid replaces lost fluids and electrolytes, making it the best choice for severe dehydration, especially in patients with electrolyte imbalances.
(D) D5W: Initially isotonic but becomes hypotonic once glucose is metabolized, leading to fluid shifts into cells, worsening dehydration.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
(A) Hydrochlorothiazide: A thiazide diuretic used for hypertension, not ICP.
(B) Spironolactone: A potassium-sparing diuretic used for heart failure, not ICP.
(C) Furosemide: A loop diuretic that reduces fluid overload but is not the first choice for ICP management.
(D) Mannitol: An osmotic diuretic that reduces brain swelling by drawing fluid out of the brain and into the bloodstream.
Correct Answer is D
Explanation
(A) Sodium: Thiazide diuretics can lower sodium, but hyponatremia does not directly affect digoxin toxicity.
(B) Magnesium: Magnesium is important for cardiac function but not as directly linked to digoxin toxicity as potassium.
(C) Calcium: Thiazides can cause hypercalcemia, but calcium does not significantly affect digoxin toxicity.
(D) Potassium: Thiazide diuretics (e.g., hydrochlorothiazide) cause potassium loss, which increases the risk of digoxin toxicity. Hypokalemia sensitizes the heart to digoxin’s effects, leading to arrhythmias.
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