A nurse working in an emergency department is assessing a client who is experiencing chest pain that began 6 hr ago. Which of the following findings indicates that the client is having a myocardial Infarction?
Decreased creatine kinase-MB
Decrease in respiratory rate
ST segment depression
Increased troponin I
The Correct Answer is D
Rationale:
A. Decreased creatine kinase-MB: CK-MB is a cardiac enzyme that rises within 4–6 hours of myocardial infarction and peaks around 24 hours. A decrease in CK-MB would not indicate acute myocardial injury and is not a diagnostic marker in this case.
B. Decrease in respiratory rate: A lower respiratory rate is not a typical or reliable indicator of myocardial infarction. Clients experiencing an MI are more likely to show signs of dyspnea, anxiety, or increased respiratory effort due to pain or decreased oxygenation.
C. ST segment depression: ST segment depression may indicate myocardial ischemia or a non-ST elevation myocardial infarction (NSTEMI), but it is less specific than biomarkers like troponin. It may also appear in other conditions such as angina or electrolyte imbalances.
D. Increased troponin I: Troponin I is a highly specific and sensitive cardiac biomarker that rises within 3–6 hours of myocardial injury. An elevated troponin I level 6 hours after the onset of chest pain strongly supports the diagnosis of myocardial infarction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. "I should avoid over-the-counter medications that contain alcohol.": Disulfiram causes an unpleasant reaction when alcohol is consumed, even in small amounts. Clients must avoid alcohol-containing products such as certain cough syrups, mouthwashes, and topical solutions to prevent serious adverse effects like flushing, nausea, and hypotension.
B. "I will need to get a monthly injection of this medication.": Disulfiram is an oral medication taken daily, not administered via monthly injection. The injectable form is associated with other medications used in substance use disorder treatment, such as naltrexone.
C. "My provider wants me to take this medication for 2 weeks before I try to quit drinking.": Disulfiram is intended for clients who have already stopped drinking. It is not used to initiate abstinence but to maintain it by discouraging alcohol use through aversive effects.
D. "I will plan to continue taking this medication for at least 5 years.": The duration of disulfiram therapy varies based on the client’s progress and treatment plan. Long-term use beyond 1–2 years is uncommon and typically guided by continued risk of relapse and provider judgment.
Correct Answer is B
Explanation
Rationale:
A. "Apply the ointment to the skin every 4 hr.": Nitroglycerin topical ointment is applied every 6 to 8 hours, depending on the provider's instructions. Applying it every 4 hours may increase the risk of side effects such as hypotension or tolerance due to excessive dosing frequency.
B. "Spread the ointment in a thin, even layer.": The medication should be applied in a thin, consistent layer to allow for proper absorption through the skin. The dose is usually measured and spread using applicator paper, avoiding rubbing or massaging it in.
C. "Apply the ointment to the forearm.": The preferred application sites are hairless areas of the chest, back, or upper arms. The forearm is not typically used due to variability in absorption and the presence of thinner skin and more movement.
D. "Massage the ointment into the skin.": Nitroglycerin ointment should never be massaged into the skin. Massaging can lead to unpredictable absorption rates and an increased risk of hypotension or headache due to rapid systemic absorption.
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