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 A
Explanation
(A) Tetany: Hypocalcemia increases neuromuscular excitability, leading to muscle cramps, spasms, and tetany (involuntary muscle contractions).
(B) Hypertension: Hypocalcemia does not directly cause hypertension; it may lead to hypotension.
(C) Constipation: Hypercalcemia, not hypocalcemia, causes constipation.
(D) Polyuria: Hypercalcemia leads to polyuria, while hypocalcemia does not.
Correct Answer is D
Explanation
(A) Sickle Cell Anemia: Follows incomplete dominance, where the heterozygous trait has a milder phenotype.
(B) Huntington’s Disease: Follows autosomal dominant inheritance, not co-dominance.
(C) Marfan Syndrome: Is an autosomal dominant disorder, not co-dominance.
(D) ABO Blood Type Inheritance: Co-dominance means both alleles are fully expressed. In ABO blood types, a person with AB blood has both A and B antigens expressed equally.
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