ATI RN
Fluid and Electrolytes ATI
1. The nurse is admitting a patient with a suspected fluid imbalance. The most sensitive indicator of body fluid balance is:
- A. Daily weight
- B. Serum sodium levels
- C. Measured intake and output
- D. Blood pressure
Correct answer: A
Rationale: Daily weight is the most sensitive indicator of body fluid balance because it can show trends over time, helping in assessing the effectiveness of interventions and medications. While serum sodium levels provide objective data on electrolyte balance, they may not accurately reflect fluid balance, especially if a patient is dehydrated. Measured intake and output are crucial for assessing fluid balance, but it can be challenging to match the two due to various ways fluid is lost from the body. Blood pressure and other vital signs may not always be reliable indicators of fluid balance as they can be influenced by other factors beyond fluid status.
2. A nurse manager assigns a new nurse to care for a client with unstable blood pressure. What is the nurse's priority action?
- A. Ask the charge nurse for assistance.
- B. Recheck the blood pressure before calling for help.
- C. Monitor the client's blood pressure closely.
- D. Administer antihypertensive medication immediately.
Correct answer: B
Rationale: The correct answer is to recheck the blood pressure before calling for help. When caring for a client with unstable blood pressure, the nurse's priority is to ensure an accurate assessment. Rechecking the blood pressure will confirm the instability and guide further actions. Asking the charge nurse for assistance (Choice A) is important but should come after assessing the situation. Monitoring the client's blood pressure closely (Choice C) is essential, but the immediate action should be to recheck and confirm the current status. Administering antihypertensive medication immediately (Choice D) without a confirmed assessment can be dangerous and is not the initial priority.
3. At what amount does Acetaminophen stop effectively controlling pain?
- A. Over 1,000 mg
- B. 750 mg
- C. Over 1,500 mg
- D. 150 mg
Correct answer: A
Rationale: Acetaminophen is known to lose its effectiveness in controlling pain beyond a dosage of 1,000 mg. Taking more than 1,000 mg will not provide additional pain relief but can increase the risk of adverse effects. Choice B (750 mg) is incorrect because this amount is within the typical recommended dose range for Acetaminophen. Choice C (Over 1,500 mg) is incorrect as it suggests a higher dose than the point at which Acetaminophen starts to lose its effectiveness. Choice D (150 mg) is too low a dose to effectively control pain for most adults.
4. What is the approximate stroke volume of the heart?
- A. Approximately 60 mL of blood per beat
- B. Approximately 70 mL of blood per beat
- C. Approximately 80 mL of blood per beat
- D. Approximately 90 mL of blood per beat
Correct answer: B
Rationale: The correct answer is B: Approximately 70 mL of blood per beat. The stroke volume of the heart is typically around 70 mL, indicating the volume of blood ejected from the left ventricle with each contraction. Choices A, C, and D are incorrect as they do not represent the standard approximate stroke volume of the heart, which is around 70 mL per beat.
5. The HCP orders cultures of the urethral urine, bladder urine, and prostatic fluid. Which instructions would the nurse teach to achieve the first two (2) specimens?
- A. Collect the first 15 mL in one jar and then the next 50 mL in another
- B. Collect three (3) early morning, clean voided urine specimens
- C. Collect the specimens after the HCP massages the prostate
- D. Collect a routine urine specimen for analysis
Correct answer: A
Rationale: The correct answer is to collect the first 15 mL in one jar and then the next 50 mL in another. This method allows for accurate cultures of urethral and bladder urine. Choice B is incorrect because it does not specify the correct method for collecting urethral and bladder urine separately. Choice C is incorrect because prostatic fluid is a separate specimen that does not require prostatic massage for collection. Choice D is incorrect as it suggests collecting a routine urine specimen, which does not fulfill the HCP's orders for specific cultures.
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