The nurse is caring for a patient with end-stage kidney disease (ESKD). Which arterial blood gas results (ABG) will the nurse correlate with the patient's condition?
pH 7.21, PaCO2 36, HCO3 14
pH 7.50, PaCO2 29, HCO3 22
pH 7.47, PaCO2 45, HCO3 33
pH 7.31, PaCO2 48, HCO3 24
The Correct Answer is A
Choice A reason: The ABG results of pH 7.21, PaCO2 36, HCO3 14 indicate metabolic acidosis, which is common in patients with end-stage kidney disease (ESKD). In ESKD, the kidneys lose their ability to excrete acid and maintain bicarbonate levels, leading to an accumulation of acid in the blood. This condition results in a low pH (acidic), normal PaCO2 (as the respiratory system attempts to compensate), and low HCO3 (bicarbonate).
Choice B reason: The ABG results of pH 7.50, PaCO2 29, HCO3 22 indicate respiratory alkalosis, which is not typically associated with ESKD. Respiratory alkalosis occurs when there is excessive exhalation of carbon dioxide, leading to a higher pH (alkaline). This condition is more likely to be seen in situations such as hyperventilation, anxiety, or certain lung diseases.
Choice C reason: The ABG results of pH 7.47, PaCO2 45, HCO3 33 indicate metabolic alkalosis, which is not typically associated with ESKD. Metabolic alkalosis occurs when there is an excess of bicarbonate or a loss of acid. This condition can result from factors such as vomiting, diuretic use, or excessive antacid consumption. It is not a common finding in patients with ESKD.
Choice D reason: The ABG results of pH 7.31, PaCO2 48, HCO3 24 indicate respiratory acidosis, which is not typically associated with ESKD. Respiratory acidosis occurs when there is an accumulation of carbon dioxide due to impaired respiratory function. This condition is more likely to be seen in chronic obstructive pulmonary disease (COPD) or other respiratory disorders. It is not a common finding in patients with ESKD.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: Hypoventilation is not a cause of respiratory alkalosis. Hypoventilation leads to respiratory acidosis due to the retention of carbon dioxide (CO2). Respiratory alkalosis occurs when there is excessive exhalation of CO2, leading to a higher pH (alkaline).
Choice B reason: Panic attacks can cause respiratory alkalosis due to hyperventilation. During a panic attack, a person may breathe rapidly and deeply, leading to excessive loss of CO2. This reduces the CO2 levels in the blood and increases the pH, resulting in respiratory alkalosis.
Choice C reason: Pneumonia is more likely to cause respiratory acidosis or metabolic acidosis rather than respiratory alkalosis. Pneumonia can impair gas exchange, leading to CO2 retention and decreased oxygen levels, which are not typical triggers for respiratory alkalosis.
Choice D reason: Congestive heart failure can lead to respiratory alkalosis, but it is more commonly associated with metabolic acidosis due to poor perfusion and anaerobic metabolism. Hyperventilation in heart failure patients can lead to respiratory alkalosis, but panic attacks are a more direct and common cause.
Correct Answer is B
Explanation
Choice A reason: An arterial pH less than 7.3 indicates acidosis, which is common in diabetic ketoacidosis but not typical in hyperglycemic hyperosmolar syndrome. Patients with hyperglycemic hyperosmolar syndrome typically have a near-normal pH.
Choice B reason: Altered mental status is a significant clinical manifestation in hyperglycemic hyperosmolar syndrome due to severe hyperglycemia and the hyperosmolar state, which can lead to dehydration and impaired brain function.
Choice C reason: The presence of ketones in urine is more commonly associated with diabetic ketoacidosis rather than hyperglycemic hyperosmolar syndrome. The absence of significant ketonemia differentiates hyperglycemic hyperosmolar syndrome from diabetic ketoacidosis.
Choice D reason: Serum bicarbonate less than 15 mEq/L is indicative of metabolic acidosis, typically seen in diabetic ketoacidosis rather than hyperglycemic hyperosmolar syndrome, where bicarbonate levels are usually normal or slightly decreased.
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