A client with a history of takes about 15 antacid tablets per day. The nurse understands that this client is at risk for:
metabolic alkalosis.
respiratory alkalosis.
metabolic acidosis.
respiratory acidosis.
The Correct Answer is A
A. Metabolic alkalosis is characterized by an elevation of the bicarbonate (HCO3) levels in the blood, leading to an increase in pH above the normal range (7.35-7.45). Antacid tablets typically contain compounds such as calcium carbonate, magnesium hydroxide, or aluminum hydroxide, which can neutralize stomach acid (hydrochloric acid). Chronic ingestion of large amounts of antacids, as in the case of this client taking approximately 15 tablets per day, can result in excessive bicarbonate intake, leading to metabolic alkalosis.
B. Respiratory alkalosis occurs when there is a decrease in carbon dioxide (CO2) levels in the blood, leading to an increase in pH above the normal range. Antacid tablets do not directly affect respiratory function or CO2 levels, so respiratory alkalosis is unlikely to occur as a result of antacid ingestion.
C. Metabolic acidosis is characterized by a decrease in bicarbonate (HCO3) levels in the blood, leading to a decrease in pH below the normal range. In the context of antacid ingestion, metabolic acidosis is less likely to occur. However, if the antacids contain compounds that are absorbed systemically and excreted by the kidneys (such as aluminum-containing antacids), they may lead to renal dysfunction or electrolyte imbalances, which could potentially contribute to metabolic acidosis.
D. Respiratory acidosis occurs when there is an increase in carbon dioxide (CO2) levels in the blood, leading to a decrease in pH below the normal range. Antacid tablets do not directly affect respiratory function or CO2 levels, so respiratory acidosis is unlikely to occur as a result of antacid ingestion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Vomiting results in loss of hydrochloric acid (HCl) from the stomach, leading to a loss of chloride ions (Cl-) and hydrogen ions (H+) from the body. This loss of hydrogen ions can result in an accumulation of bicarbonate ions (HCO3-) relative to hydrogen ions, leading to metabolic alkalosis. Therefore, this client is at risk for developing metabolic alkalosis due to prolonged vomiting.
B. Client who has had diarrhea for the past 24 hours: Diarrhea leads to loss of bicarbonate ions (HCO3-) from the body along with fluid and electrolytes. However, metabolic alkalosis is less likely to occur with diarrhea alone because the loss of bicarbonate ions is usually balanced by the loss of chloride ions (Cl-) and hydrogen ions (H+). Therefore, while diarrhea can lead to metabolic acidosis in some cases, it is less likely to cause metabolic alkalosis.
C. Client who has overdosed on heroin: Heroin overdose is not directly associated with metabolic alkalosis. In the context of heroin overdose, respiratory depression leading to respiratory acidosis is a more immediate concern. Therefore, this client is not at risk for developing metabolic alkalosis due to heroin overdose.
D. Client who is admitted with an asthma exacerbation: Asthma exacerbation can lead to respiratory alkalosis due to hyperventilation and excessive elimination of carbon dioxide (CO2) from the body. However, metabolic alkalosis is not a typical consequence of asthma exacerbation alone. Therefore, while this client may experience respiratory alkalosis, they are not at risk for developing metabolic alkalosis solely due to asthma exacerbation.
Correct Answer is C
Explanation
C. Full compensation typically occurs within 2 to 3 days (approximately 72 hours) after the onset of an acid-base disturbance. During full compensation, the primary acid-base disorder (e.g., respiratory acidosis or alkalosis, metabolic acidosis or alkalosis) is still present, but the compensatory mechanisms have effectively brought the pH, pCO2, and bicarbonate (pHCO3) levels back towards normal range.
A. Full compensation occurs when both the primary disorder (respiratory or metabolic) and the compensatory mechanism (renal or respiratory) are functioning to return the pH towards normal. In this option, while the pO2 is within the normal range, the pH, pCO2, and bicarbonate (pHCO3) are all abnormal, indicating an ongoing imbalance.
B. Full compensation occurs when all components of the ABG are within or approaching normal range, indicating that the body's compensatory mechanisms have effectively counteracted the primary acid- base disturbance. In this option, the bicarbonate (pHCO3) is mentioned as starting to change, indicating incomplete compensation.
D. While the pH is within the normal range, both the pCO2 and pO2 are abnormal, indicating a primary respiratory disturbance. In the case of full compensation, the pH, pCO2, and bicarbonate (pHCO3) levels would all be within or approaching normal range, indicating that the compensatory mechanisms have effectively counteracted the primary acid-base disturbance.
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