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 C
Explanation
Step 1: Divide the prescribed dose (40 mg) by the concentration on hand (30 mg/mL).
Step 2: Perform the calculation: 40 mg ÷ 30 mg/mL = 1.3333 mL.
Step 3: Round the answer to the nearest tenth: 1.3333 mL rounds to 1.3 mL.
Correct Answer is D
Explanation
Choice A: Clarify that these precautions are mandated by law.
While it's important to acknowledge the legal requirements for Contact Precautions, this approach alone may not adequately address the family's emotional concerns and fears. It could potentially increase their anxiety if they feel forced to visit without understanding the reasons behind the precautions.
Choice B: Emphasize the importance of their visit to the patient.
While family support is crucial for the patient's well-being, emphasizing the importance of their visit without addressing their fears could inadvertently pressure them to visit without feeling comfortable or confident in their ability to protect themselves.
Choice C: Assure the family that they will not contract the infection.
It's not always possible to guarantee that the family won't contract the infection. Making such assurances could create a false sense of security and potentially lead to lapses in infection control practices.
Choice D: Demonstrate to the family how to prevent the spread of the disease.
Empowering the family through education and demonstration is the most effective approach. It addresses their concerns directly, promotes understanding, and instills confidence in their ability to protect themselves while visiting.
Key elements of this demonstration include:
Proper hand hygiene techniques
Use of personal protective equipment (PPE) such as gloves and gowns Safe handling of potentially contaminated items
Maintaining a safe distance from the patient when appropriate Understanding the modes of transmission for the specific disease
By providing clear guidance and allowing for practice, the nurse can help the family feel more comfortable and confident in their ability to visit safely.
Additional considerations:
Addressing the family's emotional concerns: Acknowledge their fears and provide reassurance in a compassionate and understanding manner.
Tailoring education to the family's level of understanding: Use simple language and visual aids as needed.
Encouraging questions and open communication: Create a supportive environment where the family feels comfortable asking questions and expressing their concerns.
Collaborating with other healthcare professionals: Involve infection control specialists or other relevant team members to provide additional support and expertise.
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