A nurse is caring for a patient who has acute kidney injury.
The patient’s ABGs are: pH: 7.26, PaCO2: 30 mm Hg, HCO3: 14 mEq/L. Which of the following acid-base imbalances should the nurse identify the patient is experiencing?
Metabolic alkalosis.
Metabolic acidosis.
Respiratory alkalosis.
Respiratory acidosis.
The Correct Answer is B
Choice A rationale:
Metabolic alkalosis is characterized by a high pH (above 7.45), high bicarbonate (HCO3-) levels, and normal or low PaCO2. The patient's ABGs show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg), which are not consistent with metabolic alkalosis.
Choice C rationale:
Respiratory alkalosis is characterized by a high pH (above 7.45), low PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low PaCO2, but the pH is low (acidic) and the bicarbonate is low, which are not consistent with respiratory alkalosis.
Choice D rationale:
Respiratory acidosis is characterized by a low pH (below 7.35), high PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low pH, but the PaCO2 is also low, which is not consistent with respiratory acidosis.
Rationale for the correct answer, B:
Metabolic acidosis is characterized by a low pH (below 7.35), low bicarbonate levels, and normal or low PaCO2. The patient's ABGs are consistent with metabolic acidosis because they show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg).
Acute kidney injury is a common cause of metabolic acidosis. The kidneys play a vital role in regulating acid-base balance by excreting acids and reabsorbing bicarbonate. When the kidneys are damaged, they are unable to excrete acids effectively, leading to an accumulation of acids in the blood and a decrease in bicarbonate levels.
Additional Information:
It's important to note that the patient's low PaCO2 is likely a compensatory mechanism for the metabolic acidosis. In response to acidosis, the respiratory system tries to increase ventilation to blow off more carbon dioxide, which helps to raise the pH. However, this compensatory mechanism is often not enough to fully correct the acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Recapping needles is a dangerous practice that significantly increases the risk of needlestick injuries.
The act of recapping involves directing the sharp end of the needle towards one's hand, creating a high likelihood of accidental puncture.
Even experienced healthcare professionals are susceptible to needlestick injuries during recapping.
Wastebaskets are not designed for the safe disposal of sharps and can easily be punctured, leading to potential exposure to bloodborne pathogens.
Choice B rationale:
While it is true that needles should not be recapped on ABG specimens, this option does not address the broader issue of safe needle disposal in general.
Focusing solely on ABG specimens could lead to the misconception that recapping is acceptable for other types of needles.
Choice D rationale:
Breaking needles in half is not recommended as a standard practice for needle disposal.
This action can create sharp fragments that are difficult to handle and can still cause injuries.
Sharps disposal containers are designed to safely contain intact needles and should be used as the primary method of disposal.
Choice C rationale:
Placing uncapped needles directly into a puncture-proof container is the safest and most recommended practice for needle disposal.
These containers are specifically designed to prevent needlestick injuries by shielding the sharps from accidental contact. They are typically made of hard plastic or metal and are clearly labeled for biohazard waste.
Using puncture-proof containers consistently for all needle disposal significantly reduces the risk of needlestick injuries among healthcare workers.
Correct Answer is B
Explanation
Choice A rationale:
While explaining the importance and rationale of the new policy can be helpful, it may not address the underlying reasons for the nurse's resistance.
If the nurse does not understand or agree with the rationale, they may still be resistant to change.
Additionally, simply providing information may not create an open and trusting environment where the nurse feels comfortable expressing their concerns.
Choice B rationale:
Encouraging the nurse to verbalize their concerns allows the nurse manager to understand the specific reasons for the resistance.
This can help to identify any misconceptions or concerns that can be addressed directly.
It also gives the nurse an opportunity to feel heard and understood, which can help to build trust and rapport. When nurses feel that their concerns are being taken seriously, they are more likely to be open to change.
Choice C rationale:
Threatening disciplinary action is likely to create resentment and further resistance. It may also damage the relationship between the nurse manager and the nurse.
This approach should only be used as a last resort, after other attempts to address the resistance have failed.
Choice D rationale:
Ignoring the resistance is not an effective strategy.
It is likely to lead to continued noncompliance with the new policy,
It may also send the message that the nurse manager does not care about the nurse's concerns.
Peer pressure can sometimes be helpful in facilitating change, but it should not be relied upon as the sole strategy.
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