A nurse is caring for a client who has the following arterial blood gas results: HCO3 18 mEq/L, PaCO2 28 mm Hg, and pH 7.30. The nurse recognizes the client is experiencing which of the following acid-base imbalances?
Metabolic alkalosis
Respiratory alkalosis
Respiratory acidosis
Metabolic acidosis
The Correct Answer is D
Choice A Reason:
Metabolic alkalosis is characterized by an elevated pH (greater than 7.45) and an increased bicarbonate (HCO3) level. In this case, the pH is 7.30, indicating acidosis, and the HCO3 level is 18 mEq/L, which is below the normal range (22-26 mEq/L). Therefore, metabolic alkalosis is not the correct diagnosis.
Choice B Reason:
Respiratory alkalosis is indicated by a high pH (greater than 7.45) and a low PaCO2 (less than 35 mm Hg). Although the PaCO2 is low at 28 mm Hg, the pH is 7.30, indicating acidosis rather than alkalosis. Therefore, respiratory alkalosis is not the correct diagnosis.
Choice C Reason:
Respiratory acidosis is characterized by a low pH (less than 7.35) and an elevated PaCO2 (greater than 45 mm Hg). In this case, the pH is low, indicating acidosis, but the PaCO2 is also low at 28 mm Hg, which does not fit the criteria for respiratory acidosis. Therefore, respiratory acidosis is not the correct diagnosis.
Choice D Reason:
Metabolic acidosis is indicated by a low pH (less than 7.35) and a low bicarbonate (HCO3) level (less than 22 mEq/L). In this case, the pH is 7.30, indicating acidosis, and the HCO3 level is 18 mEq/L, which is below the normal range. The low PaCO2 of 28 mm Hg suggests a compensatory respiratory response to the metabolic acidosis. Therefore, metabolic acidosis is the correct diagnosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A Reason:
Assess the client’s oxygen saturation and, if normal, turn off the oxygen. This option is not ideal because turning off the oxygen completely can lead to a rapid drop in oxygen saturation levels, especially in patients who require continuous oxygen therapy. Monitoring oxygen saturation is crucial, but turning off the oxygen is not recommended unless specifically advised by a healthcare provider. Normal oxygen saturation levels typically range from 95% to 100%1. If the levels drop below 90%, it can lead to hypoxemia, which can cause serious complications.
Choice B Reason:
Have the client lift the mask off the face when taking bites of food. This option is also not ideal because it can be cumbersome for the client and may lead to inconsistent oxygen delivery. The Venturi mask is designed to provide a precise concentration of oxygen, and lifting it off repeatedly can disrupt this consistency. Additionally, it can be uncomfortable and impractical for the client to manage the mask while eating.
Choice C Reason:
Turn the oxygen off while the client eats the meal and then restart it. This option is not recommended for similar reasons as Choice A. Turning off the oxygen can lead to a significant drop in oxygen saturation levels, which can be dangerous for the client. Continuous oxygen therapy is essential for maintaining adequate oxygen levels in patients who require it. Interrupting this therapy, even temporarily, can have adverse effects on the client’s health.
Choice D Reason:
Determine if the client can switch to a nasal cannula during the meal. This is the best option because a nasal cannula allows the client to receive continuous oxygen while eating. The nasal cannula is less obtrusive and more comfortable for the client, enabling them to eat without significant interruption to their oxygen therapy. Nasal cannulas are commonly used for patients who need supplemental oxygen but also need to perform activities such as eating and talking. This approach ensures that the client maintains adequate oxygen levels while having their meal.
Correct Answer is ["A","B","D","E"]
Explanation
Choice A Reason:
Aspirating the stomach contents is essential to ensure the nasogastric tube is correctly positioned in the stomach. This step helps verify that the tube has not migrated and is safe for medication administration. If the aspirate is not obtained, further steps should be taken to confirm the tube’s placement.
Choice B Reason:
Checking the residual volume is important to assess the stomach’s contents and ensure that the patient is tolerating the feedings or medications. High residual volumes may indicate delayed gastric emptying or other gastrointestinal issues. This information helps guide the timing and amount of medication administration.
Choice C Reason:
Removing the tube and placing it in the other nostril is not a standard practice before administering medication. This action is unnecessary and could cause discomfort or complications for the patient. The focus should be on verifying the tube’s placement and ensuring it is functioning correctly.
Choice D Reason:
Testing the stomach contents for a pH indicating acidity is a reliable method to confirm the nasogastric tube’s placement. Gastric contents typically have a pH of 1 to 5, indicating the tube is in the stomach. This step helps ensure the safe administration of medications.
Choice E Reason:
Turning off the suction to the nasogastric tube is necessary before administering medications. Suction can interfere with the absorption of the medication and may cause the medication to be removed from the stomach before it has a chance to take effect. Therefore, it is important to turn off the suction temporarily during medication administration.
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