A nurse in the ICU is planning the care of a patient who is being treated for shock. Which of the following statements best describes the pathophysiology of this patient's health problem?
Blood is shunted from vital organs to peripheral areas of the body.
Cells lack an adequate blood supply and are deprived of oxygen and nutrients.
Circulating blood volume is decreased with a resulting change in the osmotic pressure gradient.
Hemorrhage occurs as a result of trauma, depriving vital organs of adequate perfusion.
The Correct Answer is B
Rationale:
A. Blood is not shunted from vital organs to peripheral areas during shock. In fact, the body shunts blood to vital organs (brain, heart, lungs) and away from less essential areas (skin, gastrointestinal tract, kidneys) as a compensatory mechanism.
B. Shock is a state of inadequate tissue perfusion, where cells do not receive enough oxygen and nutrients to meet metabolic demands. This leads to cellular hypoxia, impaired function, and, if prolonged, organ failure. This statement best captures the core pathophysiology of shock.
C. A decrease in circulating blood volume can occur in hypovolemic shock, but osmotic pressure changes are not the primary pathophysiologic mechanism in all types of shock. This description is too narrow.
D. Hemorrhage is one possible cause of hypovolemic shock, but shock itself can result from multiple mechanisms (e.g., distributive, cardiogenic, obstructive). Therefore, this option describes only one cause rather than the general pathophysiology.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. Palpating for abdominal tenderness may help assess abdominal pathology, but it does not directly evaluate the effectiveness of pantoprazole. Protonix is not prescribed to relieve abdominal tenderness in SIRS.
B. Auscultating bowel sounds assesses gastrointestinal motility, not gastric acid suppression or prevention of stress-related mucosal damage. Therefore, it does not measure the therapeutic effect of pantoprazole.
C. Pantoprazole is a proton pump inhibitor used in patients with SIRS to prevent stress-related gastric mucosal damage and gastrointestinal bleeding. Checking stools for occult blood directly evaluates whether the medication is effective in preventing GI bleeding, making this the most appropriate assessment.
D. Asking the patient about nausea assesses gastrointestinal comfort but does not specifically reflect the effectiveness of pantoprazole in preventing stress ulcers or GI bleeding.
Correct Answer is B
Explanation
Rationale:
A. Inserting two large-bore IV catheters is critical for rapid fluid resuscitation in a patient with hypovolemic shock, but ensuring adequate oxygenation takes absolute priority in the initial assessment. IV access should be established immediately after airway and oxygenation are addressed.
B. Administering oxygen at 100% via a non-rebreather mask is the first action because airway and oxygenation are the highest priorities in emergency care (following the ABCs: Airway, Breathing, Circulation). The patient’s cool, clammy skin, tachycardia, and hypotension indicate shock with potential tissue hypoxia, so supplemental oxygen is essential to improve oxygen delivery to vital organs.
C. Placing the patient on a continuous cardiac monitor is important for detecting arrhythmias and monitoring hemodynamic status, but it is not as urgent as securing oxygenation. Monitoring alone does not treat hypoxia.
D. Drawing blood for type and crossmatch is necessary for potential transfusions, but it is secondary to immediate interventions that ensure airway, oxygenation, and perfusion. Delaying oxygenation could result in rapid deterioration.
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