A client who is experiencing respiratory distress is admitted with respiratory acidosis.
Which pathophysiological process supports the client's respiratory acidosis?
Carbon dioxide is converted in the kidneys for elimination.
Hyperventilation is eliminating carbon dioxide rapidly.
High levels of carbon dioxide have accumulated in the blood.
Blood oxygen levels are stimulating the respiratory rate.
The Correct Answer is C
Choice A rationale:
Incorrect. The kidneys do play a role in acid-base balance, but they primarily eliminate acids other than carbon dioxide. They do not significantly convert carbon dioxide for elimination.
Elaboration: While the kidneys help regulate acid-base balance through reabsorption and excretion of bicarbonate and hydrogen ions, their role in carbon dioxide elimination is minimal. They primarily excrete acids like uric acid, phosphoric acid, and lactic acid.
Choice B rationale:
Incorrect. Hyperventilation would decrease carbon dioxide levels, not contribute to respiratory acidosis. Respiratory acidosis is characterized by elevated carbon dioxide levels.
Elaboration: Hyperventilation leads to rapid and excessive breathing, causing a decrease in carbon dioxide levels in the blood. This can result in respiratory alkalosis, not respiratory acidosis.
Choice C rationale:
Correct. Respiratory acidosis is caused by the accumulation of carbon dioxide in the blood. This can happen due to impaired ventilation, such as in conditions like chronic obstructive pulmonary disease (COPD), pneumonia, or respiratory failure.
Elaboration: Carbon dioxide is produced as a byproduct of cellular metabolism. It is normally removed from the body through exhalation. When ventilation is impaired, carbon dioxide cannot be efficiently eliminated, leading to its buildup in the blood. This excess carbon dioxide reacts with water to form carbonic acid, lowering blood pH and causing respiratory acidosis.
Choice D rationale:
Incorrect. Low blood oxygen levels (hypoxemia) can stimulate the respiratory rate, but this would not directly cause respiratory acidosis. It might lead to hyperventilation, which could potentially cause respiratory alkalosis.
Elaboration: The body's respiratory center in the brainstem regulates breathing based on blood oxygen and carbon dioxide levels. Hypoxemia triggers a compensatory increase in respiratory rate to enhance oxygen intake. However, this response does not directly contribute to respiratory acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Tiotropium is a long-acting bronchodilator, not a rescue inhaler for sudden shortness of breath.
It takes several hours to reach its full effect and is not designed to provide immediate relief during acute symptoms.
Using tiotropium for sudden shortness of breath could delay the use of a more appropriate rescue medication, potentially worsening the situation.
Choice B rationale:
While tiotropium can help reduce mucus production and make secretions easier to clear, this is not its primary mechanism of action.
The client's statement focuses on a potential side effect rather than demonstrating a clear understanding of the medication's intended purpose.
Choice C rationale:
The frequency of inhaler use depends on the specific medications prescribed. Some inhalers are used daily, while others are used only as needed for symptoms.
It's essential to follow the healthcare provider's instructions for each inhaler to ensure proper use and avoid potential drug interactions.
Choice D rationale:
This statement correctly reflects the appropriate use of tiotropium.
It's typically taken once daily via a handihaler device to maintain open airways and prevent COPD symptoms. Regular daily use is crucial for optimal effectiveness.
Correct Answer is ["B","E","G"]
Explanation
B. Position the patient with the head of the bed elevated. Rationale:
Promotes lung expansion: Elevating the head of the bed by at least 30 degrees utilizes gravity to assist in diaphragmatic descent and lung expansion. This allows for greater intake of air, optimizing oxygen intake and facilitating better gas exchange.
Reduces work of breathing: When upright, the abdominal muscles can more effectively aid in breathing, reducing the workload on the diaphragm and accessory muscles. This conserves energy and decreases the patient's respiratory effort.
Enhances secretion drainage: Gravity also aids in the movement of secretions from the lower lobes of the lungs towards the upper airways, where they can be more easily coughed up or suctioned. This helps to clear the airways and improve ventilation.
E. Teach the patient to cough at least once an hour. Rationale:
Clears secretions: Coughing is a natural mechanism to clear secretions from the lungs and airways. It helps to prevent mucus buildup and potential obstruction, which can lead to atelectasis (collapse of lung tissue) and further compromise ventilation.
Improves gas exchange: By removing secretions, coughing allows for better airflow and gas exchange within the lungs. This enhances oxygenation and helps to prevent respiratory complications.
G. Assist the patient in ambulating safely. Rationale:
Mobilizes secretions: Ambulation encourages movement of secretions from the lower lobes of the lungs, promoting their clearance and preventing mucus buildup.
Prevents atelectasis: Walking and movement help to expand the lungs, reducing the risk of atelectasis and improving overall ventilation.
Enhances circulation: Ambulation also improves circulation, which can help to deliver oxygen to the tissues more effectively and aid in healing.
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