The nurse is caring for a client with respiratory acidosis. Approximately how long will it take for the renal system to compensate (to see a change in the pH) for this disorder?
72 hours
10 days
4 hours
8 hours
The Correct Answer is A
A. 72 hours: Renal compensation for respiratory acidosis involves the kidneys increasing bicarbonate (HCO₃⁻) reabsorption and excreting hydrogen ions (H⁺) to buffer excess carbon dioxide. This process is relatively slow because it relies on tubular transport mechanisms and enzymatic activity within the nephron. Renal compensation occur over 2–3 days, with near-maximal compensation around 72 hours after the onset of the respiratory disturbance.
B. 10 days: A period of 10 days is far longer than necessary for renal compensation. While full stabilization and chronic adaptations may continue beyond 72 hours in persistent respiratory acidosis, the initial compensatory response sufficient to partially normalize pH generally occurs within 2–3 days, making 10 days unnecessarily prolonged.
C. 4 hours: Four hours is insufficient for renal compensation to significantly affect blood pH. While respiratory changes can alter pH almost immediately through CO₂ retention or elimination, renal mechanisms require time for tubular cells to adjust bicarbonate reabsorption and hydrogen ion excretion.
D. 8 hours: Eight hours is still too short for effective renal compensation. Early changes may occur in tubular activity, but detectable changes in arterial pH are not expected until several days after the onset of respiratory acidosis. Initial buffering is primarily handled by extracellular and intracellular chemical buffers, not renal compensation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Ask his wife: While family members may help interpret the client’s needs, relying solely on a family member does not promote independent communication or respect the client’s autonomy. It may also lead to misinterpretation if the family cannot accurately convey the client’s intentions.
B. Use hand signals: Hand gestures can provide some nonverbal communication, but they are limited and may be misinterpreted, especially if the client’s motor skills are impaired after a stroke. Hand signals alone are not sufficient for complex or specific communication needs.
C. Use a communication board: Communication boards allow clients with expressive aphasia to point to letters, words, or pictures to convey messages. This method accommodates both verbal and cognitive limitations, facilitates more precise communication, and encourages client autonomy while reducing frustration and miscommunication.
D. Speak slowly and clearly: Speaking slowly and clearly may improve understanding for clients with receptive aphasia, but it does not enable a client with expressive aphasia to communicate their needs effectively. The client’s inability to speak requires an alternative communication method rather than adjustments to speech alone.
Correct Answer is A
Explanation
A. Acute pain: Severe pain directly impacts the client’s ability to participate in rehabilitation, ambulate safely, and perform activities of daily living. Uncontrolled pain can also lead to physiologic stress responses, such as increased heart rate, blood pressure, and respiratory rate, which can compromise recovery. Addressing acute pain is the priority because it influences both safety and overall healing outcomes.
B. Risk for infection: While post-surgical infection is an important concern, it is a potential problem rather than an immediate issue. Infection risk requires monitoring and preventive measures but does not pose the same immediate threat to safety and functional ability as severe, uncontrolled pain.
C. Surgical repair: This is a medical intervention rather than a nursing diagnosis. While important, it does not reflect the client’s current priority need from a nursing perspective, which focuses on physiological and functional safety.
D. Impaired mobility: Impaired mobility is relevant in this post-op patient; however, mobility is currently limited by severe pain. Addressing pain first facilitates safe participation in mobility activities and rehabilitation, making it the more urgent concern.
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