A nurse assessing a client determines that he is in the compensatory stage of shock. Which of the following findings support this conclusion?
Blood pressure of 84/50 mm Hg
Confusion
Anuria
Petechiae
The Correct Answer is B
Choice A reason: Blood pressure of 84/50 mm Hg indicates decompensated shock, not the compensatory stage. In the compensatory stage, the body maintains blood pressure through vasoconstriction and tachycardia. Hypotension suggests failure of compensatory mechanisms, leading to inadequate tissue perfusion and progression to a more severe stage of shock, requiring immediate intervention.
Choice B reason: Confusion is a hallmark of the compensatory stage of shock. Reduced cerebral perfusion due to decreased blood volume or cardiac output impairs brain function, causing altered mental status. The sympathetic nervous system is activated, redirecting blood to vital organs, but subtle neurological changes like confusion occur as early signs of inadequate oxygen delivery to the brain.
Choice C reason: Anuria, or absence of urine output, is characteristic of the progressive or decompensated stage of shock. In the compensatory stage, urine output is reduced (oliguria) as the kidneys conserve fluid via the renin-angiotensin-aldosterone system. Anuria indicates severe renal hypoperfusion, which occurs later when compensatory mechanisms fail to maintain adequate circulation.
Choice D reason: Petechiae, small hemorrhagic spots on the skin, are not typical in the compensatory stage of shock. They may occur in disseminated intravascular coagulation (DIC), a complication of severe shock, but not in early compensatory stages. The body prioritizes vasoconstriction and fluid conservation, with no direct link to petechial formation in this phase.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Elevated troponin is a strong indicator of myocardial infarction, reflecting massive cardiac cell destruction. Troponins are proteins released from damaged cardiomyocytes during ischemia. Their high specificity for cardiac muscle makes them a key biomarker for diagnosing acute myocardial infarction, as levels rise within hours of cell death.
Choice B reason: Decreased hemoglobin indicates anemia or blood loss but is not specific to massive cell destruction in myocardial infarction. It may occur secondary to chronic conditions or bleeding but does not directly reflect acute cardiac tissue damage, unlike troponin, which is a precise marker of cardiomyocyte necrosis.
Choice C reason: Elevated creatinine reflects renal dysfunction, not massive cell destruction in myocardial infarction. It indicates impaired kidney filtration, often due to hypoperfusion or chronic disease. While shock from infarction may cause secondary renal injury, creatinine is not a direct marker of cardiac cell death, unlike troponin.
Choice D reason: Decreased sodium (hyponatremia) may occur in heart failure or fluid overload but is not a marker of massive cell destruction. It reflects electrolyte imbalance, not tissue necrosis. In myocardial infarction, sodium levels are typically unaffected unless complicated by other conditions, making it irrelevant to acute cardiac damage.
Correct Answer is ["A","C","D","E"]
Explanation
Choice A reason: Collecting sputum specimens for acid-fast bacilli (AFB) testing over three consecutive mornings is critical for diagnosing active tuberculosis. AFB smear and culture detect Mycobacterium tuberculosis in sputum, confirming pulmonary TB. Morning samples yield higher bacterial loads, improving diagnostic sensitivity, as the bacteria accumulate overnight in the respiratory tract.
Choice B reason: Monitoring vital signs every shift is important for assessing patient stability but does not directly aid in diagnosing active tuberculosis. Fever or tachycardia may suggest infection, but these are non-specific and not confirmatory. Diagnostic tests like AFB, imaging, or serology are needed to identify Mycobacterium tuberculosis as the cause of symptoms.
Choice C reason: Ordering a complete blood count, basic metabolic panel, HIV viral load, and VDRL supports TB diagnosis. CBC may show anemia or leukocytosis, BMP assesses organ function, HIV testing identifies immunosuppression increasing TB risk, and VDRL rules out syphilis, which can mimic TB symptoms. These provide a comprehensive diagnostic workup.
Choice D reason: A chest X-ray is essential for diagnosing active pulmonary tuberculosis. It reveals characteristic findings like cavitary lesions, infiltrates, or hilar lymphadenopathy in the lungs. These radiographic signs, combined with clinical symptoms and AFB testing, confirm the presence of active TB, particularly in patients with cough and weight loss.
Choice E reason: Admitting the patient to a negative pressure room is crucial for diagnosing and managing suspected active TB. It prevents airborne transmission of Mycobacterium tuberculosis to others, ensuring safety while diagnostic tests like AFB and chest X-ray are conducted. This isolation is standard for suspected infectious TB cases.
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