A client who is experiencing respiratory distress is admitted with respiratory acidosis.
Which pathophysiological process supports the client’s respiratory acidosis?
A.
Carbon dioxide is converted in the kidneys for elimination.
B.
Hyperventilation is eliminating carbon dioxide rapidly.
C.
High levels of carbon dioxide have accumulated in the blood.
D.
Blood oxygen levels are stimulating the respiratory rate.
The correct answer and Explanation is :
The correct answer is C. High levels of carbon dioxide have accumulated in the blood.
Explanation:
Respiratory acidosis is a condition characterized by an increase in carbon dioxide (CO2) levels in the blood, leading to a decrease in blood pH (making it more acidic). This condition arises when the lungs cannot effectively remove CO2 from the body, which can happen due to various factors, including respiratory distress, chronic obstructive pulmonary disease (COPD), pneumonia, or central nervous system disorders.
In a healthy respiratory system, CO2 is produced as a byproduct of metabolism and is expelled from the body through exhalation. However, when there is an obstruction or impairment in the respiratory system, CO2 begins to accumulate. This accumulation leads to an increase in carbonic acid in the blood, which in turn lowers the pH, causing respiratory acidosis.
The body attempts to compensate for this acid-base imbalance through various mechanisms. The kidneys can increase bicarbonate reabsorption and hydrogen ion excretion to help normalize blood pH over time. However, this compensation is a slower process, and immediate management is often required to address the underlying respiratory issue, such as improving ventilation or treating the underlying cause of respiratory distress.
In contrast, options A and B describe processes that would lead to a decrease in CO2 levels (alkalosis), not an accumulation. Option D pertains to the body’s response to low oxygen levels rather than CO2 levels, which does not directly contribute to respiratory acidosis. Thus, understanding that high CO2 levels are central to the pathophysiology of respiratory acidosis is crucial for proper diagnosis and treatment.