ATI RN
Fluid and Electrolytes ATI
1. What would be the best initial nursing action prior to inserting an IV?
- A. Instruct the patient to wash their hands.
 - B. Prepare the IV insertion site with povidone iodine.
 - C. Verify the order for IV therapy.
 - D. Identify a suitable vein.
 
Correct answer: C
Rationale: The best initial nursing action prior to inserting an IV is to verify the order for IV therapy. This step ensures that the IV insertion is appropriate and necessary based on the physician's orders. Instructing the patient to wash their hands (Choice A) is important for infection control but not the immediate priority before IV insertion. While preparing the IV insertion site with povidone iodine (Choice B) and identifying a suitable vein (Choice D) are crucial steps in the process, confirming the order for IV therapy (Choice C) takes precedence to ensure the correct intervention is being performed.
2. Extracellular fluid includes:
- A. plasma and intracellular fluid.
 - B. interstitial and intracellular fluids.
 - C. plasma and interstitial fluid.
 - D. plasma, interstitial fluid, and intracellular fluid.
 
Correct answer: C
Rationale: The correct answer is C: 'plasma and interstitial fluid.' Extracellular fluid consists of all body fluids outside the cells, primarily including plasma (the liquid component of blood) and interstitial fluid (the fluid between cells). Choices A, B, and D are incorrect because intracellular fluid is located within the cells, not in the extracellular fluid compartment.
3. Which negative ion is most abundant in blood plasma?
- A. Bicarbonate
 - B. Chloride
 - C. Hydroxide
 - D. Phosphate
 
Correct answer: B
Rationale: Chloride (Cl-) is the most abundant anion in blood plasma. It plays a crucial role in maintaining osmotic balance and acid-base homeostasis. Bicarbonate (Choice A) is important for buffering acids in the body but is not the most abundant negative ion in blood plasma. Hydroxide (Choice C) is not typically found in high concentrations in blood plasma. Phosphate (Choice D) is an important anion in the body but is not as abundant as chloride in blood plasma.
4. You are making initial shift assessments on your patients. While assessing one patients peripheral IV site, you note edema around the insertion site. How should you document this complication related to IV therapy?
- A. Air emboli
 - B. Phlebitis
 - C. Infiltration
 - D. Fluid overload
 
Correct answer: C
Rationale:
5. What is the most abundant positive ion in blood plasma?
- A. Potassium.
 - B. Calcium.
 - C. Sodium.
 - D. Both potassium and sodium are in equal concentrations.
 
Correct answer: C
Rationale: The correct answer is C: Sodium. Sodium (Na+) is the most abundant cation in the extracellular fluid, including blood plasma. It plays a crucial role in maintaining fluid balance, nerve function, and is essential for various physiological processes. Choice A, Potassium, is also an important ion in the body but is predominantly found intracellularly. Choice B, Calcium, is an essential mineral in the body but is not the most abundant positive ion in blood plasma. Choice D is incorrect as sodium is the primary positive ion in blood plasma, with a much higher concentration compared to potassium.
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