A nurse is admitting a client who has gastroenteritis and is reporting numbness and tingling of the toes and fingers. The nurse should recognize the client is experiencing which of the following acid-base imbalances?
Metabolic acidosis
Respiratory alkalosis
Metabolic alkalosis
Respiratory acidosis
The Correct Answer is C
A. Metabolic acidosis is characterized by a decrease in bicarbonate or an increase in acids, which can be caused by conditions like kidney failure or diabetic ketoacidosis, but it is not typically associated with numbness and tingling.
B. Respiratory alkalosis is characterized by a high pH (>7.45) and a decreased PaCO2 (<35 mm Hg). It typically results from hyperventilation, which leads to excessive elimination of CO2 and subsequent alkalosis. This condition is less likely to occur in gastroenteritis unless there are other complicating factors such as anxiety or pain causing increased respiratory rate.
C. In the context of gastroenteritis, where there may be a loss of stomach acids through vomiting or diarrhea, the most likely acid-base imbalance would be metabolic alkalosis.
D. Respiratory acidosis is characterized by a low pH and an elevated PaCO2 (>45 mm Hg). It results from hypoventilation, leading to retention of CO2 and subsequent acidosis. Respiratory acidosis would not typically present with numbness and tingling in the extremities in the context of gastroenteritis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Diarrhea can lead to loss of bicarbonate from the body, resulting in metabolic acidosis. The loss of bicarbonate through gastrointestinal fluids causes an imbalance between acids and bases in the body.
B. Salicylates (such as aspirin) can cause metabolic acidosis by several mechanisms, including direct stimulation of the respiratory center in the brainstem (leading to hyperventilation and respiratory alkalosis initially) and later causing metabolic acidosis due to increased production of acids like lactic acid and ketoacids.
C. Vomiting can lead to loss of gastric acid (hydrochloric acid), which could initially lead to metabolic alkalosis due to loss of acid.
D. Thiazide diuretics can cause metabolic alkalosis rather than metabolic acidosis. They promote the loss of potassium and hydrogen ions (acid), leading to increased blood pH (alkalosis).
Correct Answer is A
Explanation
A. Assessing the airway is always a priority in any client care situation, especially when there are respiratory abnormalities such as respiratory acidosis. Ensuring a patent airway is crucial to maintain adequate oxygenation and ventilation.
B. Bronchodilators are typically used to treat conditions such as bronchoconstriction in asthma or chronic obstructive pulmonary disease (COPD). However, in the context of respiratory acidosis with an elevated PaCO2, the primary issue is not bronchoconstriction but rather impaired gas exchange due to inadequate ventilation.
C. Mucolytics are medications used to thin mucus and facilitate its removal from the respiratory tract. While they can be beneficial in conditions with thick secretions, they do not address the underlying cause of respiratory acidosis, which is inadequate CO2 elimination.
D. Providing oxygen can help improve oxygenation in clients with respiratory acidosis. However, it is important to note that oxygen alone will not correct the underlying cause of respiratory acidosis (elevated PaCO2). Oxygen therapy is supportive and helps to improve oxygen delivery to tissues while other interventions are addressed.
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