Which of the following statements best describes the pathophysiologic rationale for shock?
Circulating blood volume is decreased.
Cells lack an adequate blood supply and are deprived of oxygen and nutrients.
Hemorrhage occurs as a result of trauma.
Blood is shunted from vital organs to peripheral areas of the body.
The Correct Answer is B
A. Circulating blood volume is decreased – This is true specifically in hypovolemic shock, but it does not apply to all types of shock (e.g., septic or cardiogenic shock).
B. Cells lack an adequate blood supply and are deprived of oxygen and nutrients – This is the most accurate and comprehensive description of the pathophysiology of shock. Shock is defined as a state of cellular and tissue hypoperfusion, regardless of the underlying cause.
C. Hemorrhage occurs as a result of trauma – While hemorrhage can cause hypovolemic shock, it is not the universal cause of all types of shock.
D. Blood is shunted from vital organs to peripheral areas of the body – The opposite is true in shock: blood is typically shunted away from peripheral tissues to preserve perfusion to vital organs like the brain and heart.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Serum sodium levels are important to monitor over time with diuretic therapy but do not provide immediate feedback on the effect of a bolus dose of furosemide.
B. Daily weight helps assess long-term fluid status but is not helpful for evaluating an acute response.
C. Hourly urine output is the most appropriate and immediate measure to assess the effectiveness of a bolus dose of IV furosemide, especially in a critically ill client with acute pulmonary edema.
D. 24-hour intake and output provides a broader picture but does not offer real-time assessment like hourly output does.
Correct Answer is D
Explanation
A. Warfarin does not convert atrial fibrillation to sinus rhythm; it is an anticoagulant, not a rhythm control medication.
B. Slowing ventricular response is achieved with rate-control medications like beta blockers or calcium channel blockers, not warfarin.
C. Warfarin prevents clot formation but does not dissolve existing clots.
D. Warfarin reduces the risk of stroke by preventing thrombus formation in clients with atrial fibrillation
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