The healthcare provider prescribes lactulose for a patient with hepatic encephalopathy. What will the nurse assess to determine the effectiveness of this medication?
Decreased ammonia levels
Relief of constipation
Decreased liver enzymes
Relief of abdominal pain
The Correct Answer is A
Choice A reason:Lactulose is used in hepatic encephalopathy primarily to lower blood ammonia levels. It works by converting ammonia in the intestines into ammonium, which is then excreted³. Therefore, a decrease in ammonia levels would indicate the effectiveness of the medication.
Choice B reason:While lactulose can relieve constipation due to its laxative effect, relief of constipation is not the primary indicator of its effectiveness in treating hepatic encephalopathy³.
Choice C reason:Decreased liver enzymes are not a direct measure of lactulose's effectiveness in hepatic encephalopathy. Liver enzymes are indicators of liver function, not ammonia levels³.
Choice D reason:Relief of abdominal pain is not a specific indicator of lactulose's effectiveness in hepatic encephalopathy. The medication's primary role is to reduce ammonia levels, not to alleviate pain³.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Metabolic alkalosis would present with an elevated pH and HCO3, which is not the case here.
Choice B reason: Respiratory alkalosis would present with an elevated pH and a decreased PaCO2, which is not the case here.
Choice C reason: Metabolic acidosis is indicated by a decreased pH and HCO3, which aligns with the ABG findings provided.
Choice D reason: Respiratory acidosis would present with a decreased pH and an elevated PaCO2, which is not the case here.
Correct Answer is A
Explanation
Choice A: Troponin Troponin levels increase within 3-12 hours from the onset of chest pain, peak at 24-48 hours, and return to baseline over 5-14 days. Troponin is a protein found in cardiac muscle fibers that regulates muscular contraction. When heart muscle is damaged, as in the case of an MI, troponin is released into the bloodstream. The elevation of troponin levels is a key indicator of myocardial infarction and can be used to diagnose and assess the extent of heart muscle damage. Troponin is the most reliable laboratory value that is expected to be elevated following a myocardial infarction, making it the correct choice in this scenario.
Choice B: Aspartate aminotransferase (AST) AST is an enzyme found in high concentrations in the liver, heart, muscles, kidneys, and brain. It is released into the bloodstream when any of these tissues are damaged. While AST can be elevated in cases of MI, it is not as specific as troponin because it is present in many other tissues besides the heart.
Choice C: Serum amylase Serum amylase is an enzyme that helps digest carbohydrates and is primarily associated with the pancreas and salivary glands. Its elevation is not specifically related to myocardial infarction but can be seen in other conditions such as pancreatitis.
Choice D: Unconjugated bilirubin Unconjugated bilirubin is a breakdown product of hemoglobin from red blood cells. Elevated levels of unconjugated bilirubin are typically associated with conditions affecting the liver or the breakdown of red blood cells, not myocardial infarction.
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