A nurse is caring for a client who has a peanut allergy. The client ate peanut butter and is now experiencing anaphylaxis. Which of the following physiological responses should the nurse expect to occur?
Blood pressure increases.
Blood vessels become more permeable.
Blood vessels constrict.
White blood cells are destroyed.
The Correct Answer is B
A. Blood pressure does not increase during anaphylaxis; instead, it typically decreases due to vasodilation and fluid leakage.
B. During anaphylaxis, blood vessels become more permeable, leading to the release of fluids into the tissues, which causes swelling and contributes to hypotension.
C. Blood vessels do not constrict during anaphylaxis; rather, they dilate as a part of the allergic response, resulting in decreased blood pressure.
D. While there is an immune response during anaphylaxis, white blood cells are not destroyed; rather, they are activated to respond to the allergen, leading to inflammation and other systemic effects.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Respiratory acidosis is indicated by the low pH (7.22) and elevated PaCO2 (68 mm Hg), demonstrating that CO2 is retained due to hypoventilation (as seen with a respiratory rate of 7/min). The bicarbonate level is within normal range, suggesting no metabolic compensation is present.
B. Metabolic acidosis would be indicated by a low pH and low bicarbonate level, which is not the case here since the bicarbonate is normal at 26 mEq/L.
C. Metabolic alkalosis would present with a high pH and high HCO3, which does not match these values.
D. Respiratory alkalosis would show a high pH and low PaCO2, which is contrary to the provided ABG results.
Correct Answer is B
Explanation
A. Increased systemic vascular resistance is typically associated with hypovolemic or cardiogenic shock, not distributive shock.
B. Distributive shock is characterized by systemic vasodilation, which leads to a decrease in systemic vascular resistance and results in inadequate tissue perfusion despite normal or increased cardiac output.
C. Loss of myocardial contractility is related to cardiogenic shock, not distributive shock.
D. Loss of blood volume is a characteristic of hypovolemic shock, whereas distributive shock occurs even when blood volume is normal due to vasodilation.
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