A nurse assesses a diabetic client who is admitted with an acid-base imbalance. The client's arterial blood gas values are pH 7.39, PaCO2 27 mm Hg, and HCO3 19 mEq/L. Which sign or symptom does the nurse identify as an example of the client's compensatory mechanisms?
Increased release of acids from the kidneys.
Increased urinary output.
Increased thirst and hunger.
Increased rate and depth of respirations.
The Correct Answer is D
A. This is not a compensatory mechanism for metabolic acidosis. In fact, during metabolic acidosis, the kidneys excrete hydrogen ions (acid) and reabsorb bicarbonate (base) to help normalize the pH of the blood.
B. Increased urinary output (polyuria) is not typically a direct compensatory response to metabolic acidosis. However, metabolic acidosis can lead to osmotic diuresis in certain conditions, which may increase urinary output as the body tries to excrete excess acids and maintain electrolyte balance.
C. Increased thirst (polydipsia) and hunger (polyphagia) are not typical compensatory responses to metabolic acidosis. These symptoms are more associated with hyperglycemia in diabetes rather than acid-base disturbances.
D. During metabolic acidosis, the respiratory system compensates by increasing the rate and depth of respirations (hyperventilation). By blowing off more CO2 (carbon dioxide), the body tries to decrease the
amount of carbonic acid in the blood, thereby increasing the pH towards normal. This compensatory mechanism helps to raise the pH back towards the normal range (7.35-7.45).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. Offering ice chips, might seem like a safe alternative, but it still poses a risk if the gag reflex is not intact.
B. Assessing the gag reflex is crucial before offering food or fluids to ensure the client can protect their airway and swallow safely. This response prioritizes safety and is appropriate to ensure the client does not aspirate.
C. Calling the healthcare provider to request orders for food and water may be necessary if there are specific protocols or if the client's condition requires further assessment or interventions before oral intake can be resumed. However, this response does not address the immediate need for comfort and hydration.
D. This response involves assessing the client's ability to swallow directly. While it addresses the client's request for water, it may not be the safest initial approach without first assessing the client's readiness and ability to swallow safely.
Correct Answer is C
Explanation
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.
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