The common denominator of all shock states is which one of the following?
Inefficient metabolism resulting from inadequate nutrition.
Inadequate tissue perfusion results in impaired cellular metabolism.
Vasoconstriction and reflexive vasodilation due to circulating mediators.
Hypovolemia results from blood loss.
The Correct Answer is B
Shock is a state of inadequate tissue perfusion, resulting in compromised oxygen and nutrient delivery to cells and impaired cellular metabolism. Regardless of the specific cause or type of shock (e.g., hypovolemic, cardiogenic, distributive), the underlying problem is the failure to supply sufficient oxygen and nutrients to the body's tissues. This inadequate tissue perfusion can lead to cellular dysfunction, organ failure, and ultimately, life-threatening consequences.
A. Inefficient metabolism resulting from inadequate nutrition in (option A) is incorrect because While inadequate nutrition can contribute to the overall health status and resilience of an individual, it is not the central mechanism underlying all shock states.
C. Vasoconstriction and reflexive vasodilation due to circulating mediators in (option C) is incorrect because Vasoconstriction and vasodilation are physiological responses that can occur in various types of shock, but they are not the fundamental common denominator. Inadequate tissue perfusion remains the core issue.
D. Hypovolemia resulting from blood loss in (option D) is incorrect because Hypovolemia, which refers to decreased blood volume, is one potential cause of shock, specifically hypovolemic shock. However, other types of shock, such as cardiogenic or distributive shock, may not be primarily characterized by hypovolemia.
Therefore, the common denominator of all shock states is inadequate tissue perfusion, resulting in impaired cellular metabolism.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The characteristics described in the monitor strip analysis suggest ventricular tachycardia. The absence of a visible P wave and the wide and distorted QRS complex indicates that the electrical impulse is originating in the ventricles rather than the atria. The ventricular rate of 196 and regular R-R intervals further support the diagnosis of ventricular tachycardia.
B. Atrial fibrillation in (option B) is incorrect because it is characterized by irregularly irregular R-R intervals and the absence of discernible P waves. The QRS complex is typically narrow
C. Atrial tachycardia in (option C) is incorrect because it would have a rapid atrial rate with regular R-R intervals, and P waves may or may not be discernible. The QRS complex is typically narrow.
D. Ventricular fibrillation in (option D) is incorrect because it would present as a chaotic, rapid, and irregular electrical activity with no discernible P waves, QRS complexes, or regular R-R intervals. It is a life-threatening emergency that requires immediate defibrillation.
Therefore, based on the provided information, the nurse would interpret the patient's cardiac rhythm as ventricular tachycardia. However, it is important to note that an accurate interpretation should be made by a qualified healthcare professional, and the patient's clinical context should also be considered.
Correct Answer is A
Explanation
Premature ventricular contractions (PVCs) are abnormal heart rhythms originating from the ventricles. They can be triggered by various factors, including irritation or stimulation of the airway during suctioning.
In this situation, the priority is to ensure adequate oxygenation and ventilation for the patient. Stopping the suctioning procedure and providing ventilatory support with 100% oxygen helps maintain oxygen levels and minimizes further cardiac dysrhythmias.
B. Check the patient's potassium level in (option B) is incorrect because While electrolyte imbalances, including low potassium levels (hypokalemia), can contribute to cardiac dysrhythmias, checking the potassium level is not the immediate priority when PVCs occur during suctioning.
C. Give prescribed PRN antidysrhythmic medications in (option C) is incorrect because: Administering antidysrhythmic medications without further assessment or evaluation may not be appropriate in this situation.
D. Decrease the suction pressure to 80 mm Hg in (option D) is incorrect because: While adjusting suction pressure may help prevent further irritation, it is not the initial priority when PVCs are present during suctioning.
E. Documenting the dysrhythmia in the patient's chart in (option E) is incorrect because: Documentation is important but should not be the initial action when a patient experiences PVCs during suctioning. Patient safety and immediate intervention take precedence.
Therefore, when PVCs occur during suctioning, the nurse should stop the procedure, provide ventilatory support with 100% oxygen, and assess the patient's response to intervention.
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