Mr. Casper, a 55-year-old patient with Gastroesophageal Reflux Disease (GERD), consumes about 16 Tums antacid tablets daily. An Arterial Blood Gas (ABG) test is conducted to evaluate his acid/base balance. The results are as follows: pH 7.46, CO2 46, PO2 86, HCO3 29, SaO2 97%. What is the interpretation of these results?
Uncompensated Respiratory Acidosis
Compensated Metabolic Acidosis
Partially Compensated Metabolic Alkalosis
Partially Compensated Respiratory Acidosis
The Correct Answer is C
Choice A rationale:
Uncompensated Respiratory Acidosis is characterized by a low pH (less than 7.35) and a high pCO2 (greater than 45 mmHg). In this case, the pH is slightly elevated (7.46), making this option less likely.
While the pCO2 is elevated (46 mmHg), the body has begun to compensate, as evidenced by the elevated HCO3 (29 mEq/L). This partial compensation does not align with an uncompensated respiratory acidosis.
Choice B rationale:
Compensated Metabolic Acidosis would present with a normal pH (7.35-7.45) due to full compensation by the respiratory system. In this case, the pH is slightly elevated (7.46), which is not consistent with full compensation.
Additionally, the HCO3 is elevated (29 mEq/L), which is characteristic of metabolic alkalosis, not acidosis.
Choice C rationale:
Partially Compensated Metabolic Alkalosis is the most likely interpretation based on the ABG results. The pH is elevated (7.46), indicating alkalosis.
The HCO3 is also elevated (29 mEq/L), which is the primary cause of metabolic alkalosis.
The pCO2 is elevated (46 mmHg), which is a compensatory mechanism to try to normalize the pH. However, the compensation is not complete, as the pH is still slightly elevated.
This partial compensation is consistent with partially compensated metabolic alkalosis.
Choice D rationale:
Partially Compensated Respiratory Acidosis would present with a low pH (less than 7.35) and an elevated pCO2 (greater than 45 mmHg).
The HCO3 would also be elevated, but to a lesser degree than in metabolic alkalosis, as it's a secondary compensatory mechanism.
In this case, the pH is slightly elevated (7.46), making respiratory acidosis less likely.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Massaging the site with scented oils is not recommended for pain relief after removal of a peripheral vascular access device. There is no evidence to support the effectiveness of scented oils in this context.
Additionally, some scented oils can be irritating to the skin, which could potentially worsen the pain, redness, and swelling.
It's crucial to use products that are specifically designed for wound care and pain management, and to follow the healthcare provider's instructions.
Choice B rationale:
Applying warm compresses to the site is an effective and recommended intervention to alleviate pain, redness, and swelling after removal of a peripheral vascular access device.
Warm compresses have the following beneficial effects:
Vasodilation: They promote blood flow to the area, which helps to reduce inflammation and pain. Muscle relaxation: The warmth helps to relax tense muscles, further easing discomfort.
Pain relief: Warmth can directly inhibit pain signals, providing a soothing sensation.
Increased circulation: Improved blood flow can help to remove inflammatory substances and promote healing. It's important to use a clean, warm compress and to apply it for 15-20 minutes at a time, several times a day.
Choice C rationale:
Topical lidocaine is a local anesthetic that can temporarily numb the skin.
While it can be used for pain relief, it's not typically the first-line intervention for pain associated with removal of a peripheral vascular access device.
Warm compresses are often preferred as they provide a more natural and non-invasive approach to pain management.
Choice D rationale:
Oral pain medication may be necessary if warm compresses do not provide adequate pain relief.
However, it's important to follow the healthcare provider's instructions regarding the type and dosage of pain medication to use.
Over-the-counter pain relievers, such as acetaminophen or ibuprofen, may be sufficient in some cases. Stronger prescription pain medication may be needed for more severe pain.
Correct Answer is D
Explanation
Rationale for Choice A:
Documentation is essential for communication and continuity of care, but it is not the most immediate priority in this situation.
The nurse should document the episode of vomiting, including the time, amount, and characteristics of the vomitus, as well as any associated symptoms or interventions.
However, auscultating lung sounds should be done first to assess for potential aspiration, which is a more urgent concern.
Rationale for Choice B:
Offering dry toast may be appropriate after the nurse has assessed for aspiration and determined that it is safe for the client to resume oral intake.
However, it is not the most important action at this time.
The nurse should first assess the client's respiratory status and address any potential complications.
Rationale for Choice C:
Rest is important for healing and recovery, but it is not the most immediate priority in this situation. The nurse should first assess the client's respiratory status and address any potential complications. Once the client is stable, the nurse can then encourage rest.
Rationale for Choice D:
Auscultating lung sounds is the most important action for the nurse to take after a client vomits.
This is because aspiration of vomitus is a serious complication that can lead to pneumonia, respiratory distress, and even death.
By auscultating lung sounds, the nurse can assess for signs of aspiration, such as crackles, wheezing, or diminished breath sounds.
If aspiration is suspected, the nurse can initiate appropriate interventions, such as suctioning, oxygen therapy, and positioning the client to facilitate drainage of secretions.
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