A nurse is reviewing arterial blood gas results for a client diagnosed with chronic obstructive pulmonary disease (COPD). The nurse should expect which abnormal finding?
Increased arterial oxygen
Increased pH
Increased carbon dioxide
Decreased alveolar function
The Correct Answer is C
A. Increased arterial oxygen: Clients with COPD typically experience chronic hypoxemia due to alveolar destruction, airway inflammation, and mucus production, which impair gas exchange. Rather than increased oxygen levels, they often have a decreased PaO₂, requiring supplemental oxygen therapy. However, excessive oxygen administration can suppress their respiratory drive, worsening CO₂ retention.
B. Increased pH: COPD is associated with respiratory acidosis due to chronic CO₂ retention from inadequate alveolar ventilation. While the kidneys compensate by increasing bicarbonate retention, the pH usually remains low or near normal in chronic cases rather than becoming elevated. A higher pH would indicate alkalosis, which is not typical in COPD unless there is an additional metabolic disturbance.
C. Increased carbon dioxide: COPD causes airway obstruction and reduced alveolar ventilation, leading to CO₂ retention (hypercapnia). As CO₂ accumulates in the blood, it lowers the pH, resulting in respiratory acidosis. Chronic hypercapnia is a hallmark of advanced COPD, and in response, the kidneys retain bicarbonate to partially compensate, stabilizing the pH over time but leaving PaCO₂ elevated.
D. Decreased alveolar function: While COPD does lead to progressive alveolar damage and reduced gas exchange, this is a structural and functional change rather than a specific abnormality seen in arterial blood gases. The primary ABG finding in COPD is hypercapnia, which reflects inadequate ventilation and CO₂ retention rather than just decreased alveolar function alone.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is []
Explanation
- Clostridium difficile infection is likely because the client has pneumonia and is receiving ceftriaxone, an antibiotic known to disrupt gut flora and cause opportunistic infections like C. difficile. The presence of frequent, liquid, foul-smelling stools further supports this diagnosis.
- Myocardial infarction is unlikely because while the client has chest pain, it is pleuritic and related to inspiration rather than the typical crushing, non-pleuritic chest pain seen in an MI. There is no mention of radiating pain, diaphoresis, or hemodynamic instability.
- Pulmonary edema is unlikely since it typically presents with dyspnea, crackles throughout the lung fields, pink frothy sputum, and signs of fluid overload such as peripheral edema and weight gain. The client’s symptoms do not align with this condition.
- Pulmonary embolism is also unlikely, as it presents with sudden-onset dyspnea, pleuritic chest pain, tachycardia, and often calf swelling or a history of deep vein thrombosis. The client lacks the risk factors and clinical signs of PE.
- Placing the client on contact precautions is necessary because C. difficile is highly contagious and spreads through the fecal-oral route. Gloves and gowns should be used to prevent transmission.
- Obtaining a stool culture is necessary to confirm the presence of C. difficile toxins in the stool, which is essential for accurate diagnosis and treatment.
- Requesting a prescription for an anticoagulant is not necessary because the client does not show any signs of thromboembolic disease such as deep vein thrombosis or pulmonary embolism. Anticoagulation could increase the risk of bleeding in the gastrointestinal tract, which would worsen the diarrhea.
- Requesting a prescription for a diuretic is not needed because the client is more likely to be dehydrated due to diarrhea. Diuretics would exacerbate fluid loss and electrolyte imbalances.
- Restricting fluids is not appropriate because dehydration is a major concern with C. difficile infection. Instead, fluid intake should be encouraged to prevent complications from excessive fluid loss.
- Level of consciousness should be monitored because severe dehydration and electrolyte imbalances can lead to confusion, weakness, and altered mental status. While altered mental status can occur with severe dehydration or sepsis, it is not the primary concern at this stage.
- Potassium level should be monitored because diarrhea can cause significant potassium loss, leading to hypokalemia, which can result in muscle weakness, cardiac arrhythmias, and fatigue.
- Urine output is not the most specific parameter for monitoring C. difficile infection. While dehydration is a concern, tracking electrolyte levels and neurological status is more critical.
- Calf swelling is not relevant since the client does not have signs or risk factors for deep vein thrombosis or pulmonary embolism.
- Weight: C. difficile infection can cause significant fluid loss due to persistent diarrhea, leading to dehydration and weight loss. Tracking daily weight helps assess hydration status and the effectiveness of fluid replacement therapy.
Correct Answer is B
Explanation
A. Standard: While a standard resume format includes basic information about education and experience, it may not effectively address the nurse's multiple moves and varied positions, potentially raising concerns about stability and commitment.
B. Functional: This resume type is most appropriate for the nurse in this situation as it focuses on skills and experiences rather than a chronological work history. This format allows the nurse to highlight relevant skills gained in different positions without emphasizing the frequent changes in employment, which could be beneficial in presenting a cohesive professional narrative.
C. Sequence: This term is less commonly used in resume types and may not provide clarity in presenting qualifications or experiences.
D. Chronological: While this format lists experiences in reverse chronological order, it may draw attention to the frequent changes in positions and locations, which could raise red flags for potential employers regarding the nurse's commitment and stability in a job.
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