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. Pain level of 1 on a scale of 0 to 10: A low pain score suggests effective pain management and is not associated with poor wound healing. In fact, well-controlled pain can facilitate mobility and participation in recovery activities, both of which support healing.
B. Capillary refill time 1 second: This finding reflects good peripheral perfusion, indicating adequate circulation and oxygen delivery to tissues, which are essential for optimal wound healing.
C. BMI 35: A BMI of 35 indicates obesity, which is a known risk factor for delayed wound healing. Excess adipose tissue reduces vascularity, increases tension on wound edges, and raises the risk of infection and dehiscence.
D. Oxygen saturation 97% on room air: Normal oxygen saturation ensures tissues are receiving sufficient oxygen to support cellular repair and regeneration. This value supports wound healing rather than delaying it.
Correct Answer is C
Explanation
Rationale:
A. Place a warm pack on the incisional area: Applying a warm pack immediately postoperatively can increase blood flow and risk bleeding or swelling at the surgical site. Cold packs are generally preferred in the immediate postoperative period to reduce inflammation.
B. Restrict fluids to 1,200 mL per day: Fluid restriction is not indicated after hernia repair unless the client has a comorbid condition like heart or renal failure. Adequate hydration supports healing and normal bowel and urinary function.
C. Elevate the client's scrotum on a pillow: Elevating the scrotum helps reduce swelling and discomfort after hernia repair, especially if the inguinal area is involved. This intervention promotes venous return and prevents complications like hematoma formation.
D. Encourage the client to sit to void: Sitting to void is not routinely necessary after hernia repair unless the client has mobility issues. There’s no specific benefit to this position in a typical male postoperative client.
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