A client's PaCO2 is abnormal on an ABG report.
What does the nurse suspect as the most likely medical diagnosis?
Sexually Transmitted Infection (STI).
Chronic Obstructive Pulmonary Disease (COPD).
Congestive Heart Failure (CHF).
Chronic Renal Insufficiency or Failure (CRF).
The Correct Answer is B
Choice A rationale
Sexually Transmitted Infections (STIs) primarily affect the reproductive system and do not directly cause abnormalities in PaCO2 levels. PaCO2 reflects the partial pressure of carbon dioxide in arterial blood, which is a key indicator of respiratory function and acid-base balance.
Choice B rationale
Chronic Obstructive Pulmonary Disease (COPD) is a group of lung diseases that obstruct airflow, leading to impaired gas exchange. This impaired exchange often results in the retention of carbon dioxide, causing an elevated PaCO2 level on an ABG report, indicating respiratory acidosis.
Choice C rationale
Congestive Heart Failure (CHF) primarily affects the cardiovascular system, leading to fluid overload and potential pulmonary congestion. While severe CHF can indirectly affect gas exchange, the most direct and common cause of abnormal PaCO2 is a respiratory issue like COPD.
Choice D rationale
Chronic Renal Insufficiency or Failure (CRF) primarily affects the kidneys' ability to regulate electrolytes and waste products. While CRF can lead to metabolic acidosis, which can trigger respiratory compensation (altering PaCO2), it is not the most direct or likely cause of an abnormal PaCO2 level on an ABG report.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
A colleague who graduated at the same time lacks the experience and established professional network necessary to provide effective mentorship. Mentorship involves guidance based on practical experience and insights gained over time, which a recent graduate, regardless of academic achievements, would not possess. A mentor should offer a more seasoned perspective on navigating career challenges and professional development.
Choice B rationale
While a personal friendship might offer emotional support, a unit manager who is primarily a friend may not possess the objectivity and focus required for professional mentorship. The managerial role involves administrative and supervisory responsibilities that might overshadow the specific developmental needs of a novice nurse. Furthermore, personal relationships can sometimes blur professional boundaries, hindering effective guidance.
Choice C rationale
An experienced nurse who previously served as a preceptor has demonstrated an ability to guide and educate new nurses in a clinical setting. This individual is likely familiar with the challenges faced by novice nurses and possesses the practical knowledge and teaching skills necessary for effective mentorship. Their prior experience in a similar role makes them well-suited to provide targeted support and professional guidance.
Choice D rationale
A nurse educator primarily focuses on formal education and training programs within the hospital. While they possess valuable knowledge and expertise, their role typically involves broader educational responsibilities rather than individualized, long-term mentorship. A mentor relationship often involves a more personal and ongoing connection focused on the mentee's specific career trajectory and professional growth, which may fall outside the scope of a nurse educator's primary duties.
Correct Answer is D
Explanation
Choice A rationale
The adrenal glands primarily produce hormones that regulate metabolism, immune system, blood pressure, stress response, and other essential functions. While these hormones are crucial for overall bodily function and indirectly influence alertness and arousal, they are not the primary neurological structures responsible for maintaining a conscious and aroused state.
Choice B rationale
The renin-angiotensin-aldosterone system (RAAS) is a hormonal system that regulates blood pressure and fluid balance. While changes in blood pressure and fluid balance can affect overall well-being and indirectly influence alertness, the RAAS is not the neurological center responsible for a person's state of arousal.
Choice C rationale
Cranial nerves are a set of twelve paired nerves that emerge directly from the brain. They are responsible for a wide range of sensory and motor functions, including vision, hearing, taste, smell, facial movements, and swallowing. While some cranial nerves contribute to sensory input that can influence alertness, they are not the central structure responsible for maintaining arousal itself.
Choice D rationale
The reticular activating system (RAS) is a network of neurons located in the brainstem that plays a crucial role in regulating wakefulness, alertness, and the sleep-wake cycle. It filters incoming sensory information and relays important signals to the cerebral cortex, maintaining a state of arousal and consciousness. Damage to the RAS, such as that which can occur following a stroke, can lead to altered levels of consciousness. .
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