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.

Answer and Explanation

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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Correct Answer is D

Explanation

Norepinephrine is a vasopressor medication commonly used in the management of septic shock. It acts as a potent vasoconstrictor to increase systemic vascular resistance and improve blood pressure. By constricting blood vessels, norepinephrine helps restore tissue perfusion and improve organ function.
A. Nitroglycerine (Tridil) in (option A) is incorrect because: Nitroglycerine is a vasodilator and would further lower blood pressure. It is not suitable for a patient with septic shock who already has low blood pressure.
B. Atenolol (Tenormin) in (option B) is incorrect because: Atenolol is a beta-blocker and would further decrease heart rate and blood pressure. It is not appropriate for a patient in septic shock who requires intervention to increase blood pressure.
C. Dobutamine (Dobutrex) in (option C) is incorrect because: Dobutamine is an inotropic medication used to increase cardiac output. While it can be helpful in certain types of shock, such as cardiogenic shock, it is not the first-line choice for septic shock when there is inadequate blood pressure response.

Correct Answer is ["9000"]

Explanation

4 mL × body weight in kg × percentage of burn = total fluid volume for the first 24 hours Then, divide the total fluid volume by 2 to determine the fluid volume for the first 8 hours.

In this case, the patient weighs 90 kg and has a 50% burn injury.

4 mL × 90 kg × 50% = 18,000 mL (total fluid volume for 24 hours)

18,000 mL / 2 = 9,000 mL (fluid volume for the first 8 hours)

Therefore, the nurse would infuse the intravenous fluid resuscitation at a rate of 9,000 mL over the first 8 hours.

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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?

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Naxlex Comprehensive Predictor Exams

A 66-year-old female patient in septic shock has received fluid resuscitation, but their mean arterial pressure (MAP) is 52 mmHg. The nurse anticipates the administration of which one of the following?

Correct Answer is D

Explanation

An emergency room nurse cares for a patient admitted with a 50% burn injury. The patient weighs 90 kg. Using the Parkland formula, calculate the rate (1st 8 hrs.) at which the nurse would infuse intravenous fluid resuscitation. (Record your answer using a whole number.)

Correct Answer is ["9000"]

Explanation

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