When assessing the hemodynamic information for a newly admitted patient in shock of unknown etiology, the emergency department nurse will anticipate the administration of large volumes of Lactated Ringers (LR) when which one of the following occurs?
The mean arterial pressure (MAP) is 50 mm Hg.
Cardiac Out (CO) is 4 L/min
Stroke volume 70 ml/beat
The heart rate is 80 bpm.
The Correct Answer is A
Mean arterial pressure (MAP) is a measure of the average pressure within the arteries during one cardiac cycle. It represents the perfusion pressure that drives blood flow to organs and tissues. In the context of shock, a MAP of 50 mm Hg is considered low and indicates inadequate tissue perfusion.
To improve tissue perfusion and restore blood pressure, the nurse would anticipate administering large volumes of intravenous fluids, such as Lactated Ringers (LR). Fluid resuscitation aims to increase intravascular volume and improve cardiac output, ultimately leading to improved tissue perfusion.
B. Cardiac Output (CO) is 4 L/min in (option A) is incorrect because Cardiac output represents the volume of blood pumped by the heart per minute. While a low cardiac output may require intervention, it does not specifically indicate the need for large volumes of fluid administration.
C. Stroke volume is 70 ml/beat in (option C) is incorrect because Stroke volume refers to the volume of blood ejected by the heart with each contraction. While stroke volume can be an important determinant of cardiac output, it alone does not indicate the need for large fluid volumes.
D. The heart rate is 80 bpm in (option D) is incorrect because: Heart rate is the number of heartbeats per minute. While the heart rate can impact cardiac output, it does not provide direct information about fluid resuscitation needs.
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Related Questions
Correct Answer is C
Explanation
Septic shock is a life-threatening condition characterized by severe infection, systemic inflammation, and inadequate tissue perfusion. In this critical situation, one of the initial priorities is to restore intravascular volume and improve tissue perfusion. Initiation of an intravenous line allows for the administration of fluids and other necessary medications to support the patient's hemodynamic stability.
While the other interventions mentioned are also important components of septic shock management, the immediate priority is to address hypotension and tissue hypoperfusion through fluid resuscitation:
A. Obtaining wound and blood cultures in (option A) is incorrect because: Cultures are important to identify the source and causative organisms of the infection. However, fluid resuscitation should take priority over obtaining cultures, as it is necessary to stabilize the patient's hemodynamics.
B. Removing or controlling potentially infected sources in (option B) is incorrect because: Identifying and controlling the source of infection is crucial in septic shock management to prevent further progression. However, initiating fluid resuscitation is more time-sensitive and should be prioritized.
D. Drawing blood for hematology and chemistry studies in (option D) is incorrect because Laboratory studies are important for evaluating organ function and guiding treatment. However, the immediate focus should be on fluid resuscitation to address the underlying hypoperfusion and stabilize the patient's condition.
Therefore, the intervention considered a priority when treating a patient who presents with septic shock is the initiation of an intravenous line and fluid administration to restore intravascular volume and improve tissue perfusion.
Correct Answer is B
Explanation
In this scenario, the patient's signs and symptoms suggest a state of shock, which can be caused by various factors, such as hypovolemia, cardiac dysfunction, or systemic vasodilation. The first priority in managing a patient in shock is to ensure adequate oxygenation and tissue perfusion. Administering oxygen at 100% per non-rebreather mask helps improve oxygen delivery to the tissues and supports vital organ function.
A. Placing the patient on a continuous cardiac monitor in (option A) is incorrect because it is an important step to monitor the patient's heart rhythm and identify any abnormalities. However, providing oxygen should take priority to address the potential hypoxemia and tissue hypoperfusion.
C. Inserting two 14-gauge IV catheters in (option C) is incorrect because it is crucial for establishing large-bore access for fluid resuscitation and medication administration. While it is an important step, addressing oxygenation takes precedence.
D. Drawing blood to type and crossmatch for transfusions in (option D) is incorrect because it is an important step in managing a patient in shock who may require blood products. However, ensuring adequate oxygenation through oxygen administration is the immediate priority.
Therefore, the nurse should act first on the order to administer oxygen at 100% per non-rebreather mask to support the patient's oxygenation and tissue perfusion.
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