A physician orders an isotonic IV solution for a client. Which solution should the nurse plan to administer?
Half-normal saline solution
10% dextrose in water
5% dextrose and half-normal saline solution
Lactated Ringer's solution
The Correct Answer is D
Choice A reason: Half-normal saline solution is a hypotonic solution, which means it has a lower concentration of solutes than the blood plasma. It can cause fluid to shift from the blood vessels into the cells, leading to cellular swelling and edema.
Choice B reason: 10% dextrose in water is a hypertonic solution, which means it has a higher concentration of solutes than the blood plasma. It can cause fluid to shift from the cells into the blood vessels, leading to cellular shrinkage and dehydration.
Choice C reason: 5% dextrose and half-normal saline solution is a hypertonic solution, which has the same effects as choice B. The dextrose increases the osmolarity of the solution, while the half-normal saline provides some electrolytes.
Choice D reason: Lactated Ringer's solution is an isotonic solution, which means it has the same concentration of solutes as the blood plasma. It maintains fluid balance and provides electrolytes such as sodium, potassium, calcium, and lactate. It is commonly used for fluid resuscitation, dehydration, and acidosis.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Decreased heart rate is not a manifestation of hypovolemia. Hypovolemia is a condition where there is a decreased volume of blood in the body, which can result from blood loss, dehydration, or fluid shifts. Hypovolemia can cause the heart rate to increase, not decrease, as the body tries to compensate for the low blood pressure and maintain adequate perfusion.
Choice B reason: Increased blood pressure is not a manifestation of hypovolemia. Hypovolemia can cause the blood pressure to decrease, not increase, as the blood volume and cardiac output are reduced. The body may try to constrict the blood vessels to increase the blood pressure, but this is usually not enough to overcome the effects of hypovolemia.
Choice C reason: Weak pulse is a manifestation of hypovolemia. Hypovolemia can cause the pulse to become weak, thready, or difficult to palpate, as the blood flow and pressure are diminished. The pulse may also become irregular or rapid, as the heart tries to pump faster and harder to deliver oxygen to the tissues.
Choice D reason: Dyspnea is not a specific manifestation of hypovolemia. Dyspnea is a term for difficulty breathing, which can have many causes, such as asthma, pneumonia, or pulmonary edema. Hypovolemia can cause dyspnea if it leads to shock, which is a life-threatening condition where the organs and tissues are not receiving enough oxygen. However, dyspnea alone is not enough to indicate hypovolemia.
Correct Answer is A
Explanation
Choice A reason: This is a correct answer because normal saline is an isotonic solution, which means it has the same osmolarity as the blood plasma. It does not cause any fluid shifts between the intracellular and extracellular compartments, and it can help restore the fluid balance and the blood pressure of the dehydrated client.
Choice B reason: This is not a correct answer because 1/2 normal saline is a hypotonic solution, which means it has a lower osmolarity than the blood plasma. It causes fluid to shift from the extracellular to the intracellular compartment, which can lead to cellular swelling and edema. It is not suitable for rapid infusion, as it can cause hemolysis and hypotension.
Choice C reason: This is not a correct answer because D5W (5% Dextrose in Water) is an isotonic solution when it is in the IV bag, but it becomes hypotonic once it enters the body, as the dextrose is rapidly metabolized and only water remains. It causes fluid to shift from the extracellular to the intracellular compartment, which can lead to cellular swelling and edema. It is not suitable for rapid infusion, as it can cause hemolysis and hypotension.
Choice D reason: This is not a correct answer because D5 1/2 normal saline is a hypertonic solution, which means it has a higher osmolarity than the blood plasma. It causes fluid to shift from the intracellular to the extracellular compartment, which can lead to cellular shrinkage and dehydration. It is not suitable for rapid infusion, as it can cause hypernatremia and fluid overload.
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