A nurse is reviewing laboratory results for a client who has metabolic alkalosis. Which of the following blood gas values should the nurse expect?
pH 7.36 (7.35 to 7.45), PaCO2 38 mm Hg (35 to 45 mmHg) HCO3 25 mEq/L (22 to 26 mEq/L)
pH 7.48 (7.35 to 7.45), PaCO, 32 mm Hg (35 to 45 mm Hg). HCO3 24 mEq/L (22 to 26 mE q/L)
pH 7.46 (7.35 to 7.45). PaCO2 36 mm Hg (35 to 45 mm Hg). HCO3 29 mEq/L (22 to 26 mEq/L)
pH 7.26 (7.35 to 7.45). PaCO, 35 mm Hg (35 to 45 mm Hg). HCO3 18 mEq/L (22 to 26 mEq/L)
The Correct Answer is C
A) pH 7.36 (7.35 to 7.45), PaCO2 38 mm Hg (35 to 45 mmHg), HCO3 25 mEq/L (22 to 26 mEq/L): This is a normal set of arterial blood gas (ABG) values, with a pH within normal range, a normal PaCO2, and a normal HCO3. It does not suggest metabolic alkalosis.
B) pH 7.48 (7.35 to 7.45), PaCO2 32 mm Hg (35 to 45 mm Hg), HCO3 24 mEq/L (22 to 26 mEq/L): Although the pH is elevated, indicating alkalosis, the PaCO2 is slightly low, and the bicarbonate (HCO3) is within the normal range. This set of values does not indicate metabolic alkalosis, but could indicate respiratory alkalosis or compensated alkalosis.
C) pH 7.46 (7.35 to 7.45), PaCO2 36 mm Hg (35 to 45 mm Hg), HCO3 29 mEq/L (22 to 26 mEq/L): This is consistent with metabolic alkalosis. The elevated pH (alkalosis) combined with an increased bicarbonate level (HCO3 > 26 mEq/L) and a normal PaCO2 suggests metabolic alkalosis, as the kidneys retain bicarbonate to compensate for the condition.
D) pH 7.26 (7.35 to 7.45), PaCO2 35 mm Hg (35 to 45 mm Hg), HCO3 18 mEq/L (22 to 26 mEq/L): This set of values indicates acidosis, not alkalosis. The pH is low, indicating acidosis, and the bicarbonate (HCO3) is also low, which suggests metabolic acidosis. The PaCO2 is normal, which further supports a metabolic origin of the acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Prolonged PT/INR:
A prolonged PT/INR is typically associated with liver dysfunction or clotting disorders. While pancreatitis can lead to complications like bleeding, it does not directly cause a prolonged PT/INR. In the case of pancreatitis, the main concerns are related to enzymes, fluid and electrolyte imbalances, and potential organ dysfunction, but clotting issues are not a primary diagnostic feature.
B) Elevated lipase:
This is the most characteristic lab finding in pancreatitis. Lipase is an enzyme produced by the pancreas, and its levels rise significantly when the pancreas is inflamed. Elevated lipase levels are a key diagnostic indicator of pancreatitis, often seen alongside elevated amylase levels. This finding helps confirm the diagnosis and monitor the severity of the condition.
C) Decreased albumin:
Decreased albumin levels are typically seen in conditions that affect liver function, kidney disease, or malnutrition. While pancreatitis can lead to some degree of malnutrition or fluid shifts, a decreased albumin level is not a specific or expected finding in pancreatitis itself. The focus is more on enzyme levels and possible complications like hypocalcemia or hyperglycemia.
D) Elevated ammonia:
Elevated ammonia levels are generally indicative of liver dysfunction or hepatic encephalopathy, which occurs in severe liver disease. While pancreatitis can cause systemic complications, an elevated ammonia level is not a typical lab finding associated with pancreatitis. Ammonia is more commonly monitored in cases of liver failure or cirrhosis.
Correct Answer is A
Explanation
A) "The headaches should decrease as you get used to the medication.": This statement is correct. A common side effect of isosorbide dinitrate is headaches, as the medication works by dilating blood vessels, which can cause a drop in blood pressure. These headaches typically occur when the medication starts, but they often decrease over time as the body adjusts to the drug. The nurse should reassure the client that this side effect is generally temporary.
B) "You should take the medication on an empty stomach to prevent a headache.": This statement is incorrect. While taking certain medications on an empty stomach may affect their absorption, isosorbide dinitrate is typically not recommended to be taken on an empty stomach to avoid headaches. In fact, it is more common for people to take it with food if it causes gastrointestinal discomfort, but this is not directly related to preventing headaches.
C) "You can discontinue the medication until the headache goes away.": This statement is incorrect. The client should not discontinue the medication without consulting the healthcare provider. Abruptly stopping isosorbide dinitrate can lead to withdrawal symptoms and potentially worsen the client's condition. The nurse should encourage the client to talk to their provider if the headache becomes unbearable or persistent, but not to stop the medication without guidance.
D) "Swallow the tablet whole to minimize your headaches.": This statement is incorrect. Isosorbide dinitrate in chewable form is designed to be chewed, as this method of administration helps the drug be absorbed more quickly and effectively. Swallowing the tablet whole would not address the issue of headaches and could affect how the medication works.
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