A nurse is reviewing the laboratory results of a client who is postoperative and has a respiratory rate of 7/min. The arterial blood gas (ABG) values include: pH 7.22 PaCO2 68 mm Hg Base excess -2 PaO2 78 mm Hg Oxygen saturation 80% Bicarbonate 28 mEq/L. Which of the following interpretations of the ABG values should the nurse make?
Metabolic acidosis
Respiratory acidosis
Metabolic alkalosis
Respiratory alkalosis
The Correct Answer is B
A. Metabolic acidosis
Metabolic acidosis is characterized by a low pH (< 7.35) and a decreased bicarbonate level (< 22 mEq/L). In this scenario, the pH is low (7.22), but the bicarbonate level is elevated (28 mEq/L), which does not support a diagnosis of metabolic acidosis.
B. Respiratory acidosis
Respiratory acidosis occurs when there is an accumulation of carbon dioxide (PaCO2 > 45 mm Hg), leading to a decrease in pH (< 7.35). In this case, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), consistent with respiratory acidosis.
C. Metabolic alkalosis
Metabolic alkalosis is characterized by a high pH (> 7.45) and an elevated bicarbonate level (> 26 mEq/L). In this scenario, the pH is low (7.22), and the bicarbonate level is also elevated (28 mEq/L), which does not support a diagnosis of metabolic alkalosis.
D. Respiratory alkalosis
Respiratory alkalosis occurs when there is a decrease in carbon dioxide (PaCO2 < 35 mm Hg), leading to an increase in pH (> 7.45). In this case, the pH is low (7.22), and the PaCO2 is elevated (68 mm Hg), which is not consistent with respiratory alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Offer small frequent meals
Offering small, frequent meals is beneficial for patients with COPD because it helps overcome the challenges associated with dyspnea and fatigue. Large meals can cause discomfort and increase the effort required for breathing, which can exacerbate respiratory symptoms. By providing smaller, more manageable portions of food throughout the day, patients with COPD can maintain their energy levels and meet their nutritional needs without experiencing excessive respiratory distress.
B. Encourage extra liquids with meals
Encouraging extra liquids with meals can help prevent dehydration and thin respiratory secretions, making it easier for patients with COPD to manage their respiratory symptoms. However, excessive fluid intake can also lead to feelings of fullness and discomfort, especially in patients with compromised lung function. Therefore, while it's important to encourage adequate hydration, particularly during meals, it's also essential to balance fluid intake to avoid exacerbating respiratory symptoms.
C. Assist the patient to exercise before meals
While regular exercise is beneficial for overall health and can help improve respiratory function in patients with COPD, exercising immediately before meals may not be practical or advisable for all patients. Patients with COPD may experience fatigue and dyspnea during physical activity, which can affect their ability to eat and digest food effectively. Additionally, exercising before meals may increase energy expenditure and exacerbate respiratory symptoms, making it more challenging for patients to consume an adequate amount of nutrients. Instead, patients with COPD may benefit from engaging in light physical activity or respiratory exercises at a different time of day to improve their respiratory function and overall well-being.
D. Supply information about nutrition
Providing information about nutrition is essential for patients with COPD to help them make healthy dietary choices and manage their condition effectively. However, simply supplying information may not be sufficient to enhance the nutritional status of patients with COPD. It's important to offer practical guidance and support, such as meal planning tips, dietary modifications, and strategies for overcoming barriers to healthy eating. Additionally, individualized dietary counseling from a registered dietitian can be beneficial for patients with COPD to address specific nutritional needs and preferences.
Correct Answer is A
Explanation
A. The patient's Spo2 is 97% on 2L NC:
This assessment finding indicates that the patient's oxygen saturation level (SpO2) is 97% while receiving 2 liters per minute of oxygen via nasal cannula. Oxygen saturation is a measure of the percentage of hemoglobin saturated with oxygen in the blood. A SpO2 level of 97% suggests adequate oxygenation, which is essential for effective gas exchange. Therefore, if the patient's SpO2 is within the target range on the prescribed oxygen therapy, it indicates that the interventions aimed at improving gas exchange have been effective.
B. The patient appears comfortable:
While patient comfort is important, it is not a direct indicator of effective gas exchange. A patient may appear comfortable for various reasons, such as pain relief, proper positioning, or emotional support, but this does not necessarily reflect improved gas exchange. Therefore, while comfort is an important aspect of nursing care, it is not specifically indicative of the effectiveness of interventions for impaired gas exchange.
C. The patient is coughing up copious white sputum:
The presence of copious white sputum does not directly indicate improved gas exchange. White sputum may suggest various conditions, such as respiratory tract infections or inflammation, but it does not provide direct information about gas exchange efficiency. Effective gas exchange involves the exchange of oxygen and carbon dioxide at the alveolar-capillary membrane, which cannot be assessed solely based on sputum production.
D. The patient is able to move out of bed without difficulty:
The ability to move out of bed without difficulty may indicate improved overall physical function or mobility, but it does not specifically reflect improved gas exchange. Gas exchange primarily involves the transfer of oxygen from the alveoli into the bloodstream and the removal of carbon dioxide from the bloodstream into the alveoli for exhalation. While improved gas exchange may lead to enhanced physical endurance and reduced dyspnea, the ability to move out of bed without difficulty is not a direct measure of gas exchange efficiency.
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