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 C
Explanation
Rationale:
A. Take mineral oil at bedtime: Mineral oil is not recommended for long-term use because it can interfere with absorption of fat-soluble vitamins and may lead to aspiration pneumonia, especially in older adults. Safer stool softeners or laxatives should be used for opioid-induced constipation.
B. Decrease insoluble fiber intake: Insoluble fiber, such as wheat bran, helps bulk the stool and promote bowel movements. Reducing fiber intake can worsen constipation rather than relieve it, especially in clients taking opioids.
C. Increase exercise activity: Regular physical activity stimulates peristalsis and helps prevent constipation. Movement is a key non-pharmacologic strategy to counteract the slowed gastrointestinal motility caused by opioids.
D. Drink 1.5 L of fluids each day: Although hydration is important, adults typically require around 2 to 3 liters of fluid daily unless contraindicated. Limiting intake to 1.5 L may be insufficient to support normal bowel function and soften stool.
Correct Answer is B
Explanation
Rationale:
A. Butorphanol tartrate: This opioid analgesic can cause respiratory depression in the newborn if given too close to delivery. At 10 cm dilation and during pushing, it's generally too late to administer systemic opioids safely.
B. Pudendal block: A pudendal block provides localized perineal anesthesia and is safe for use during the second stage of labor when the client is fully dilated and pushing. It effectively reduces pain from stretching and pressure without affecting uterine contractions or fetal status.
C. Naloxone hydrochloride: Naloxone is not a pain-management measure; it is an opioid antagonist used to reverse opioid-induced respiratory depression. It does not provide analgesia and is not administered for pain relief during labor.
D. Spinal anesthesia: Spinal anesthesia is typically administered prior to a planned cesarean birth or late in the first stage of labor. It is not appropriate once the client is fully dilated and actively pushing, as it could delay delivery and complicate maternal positioning.
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