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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
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.
Correct Answer is C
Explanation
In septic shock, one of the key goals of management is to restore and maintain adequate intravascular volume. However, in this case, the patient's urine output is low (30 mL/hr for the past 3 hours), suggesting inadequate renal perfusion and potential fluid overload.
Administering additional normal saline at an increased rate (250 mL/hr) without addressing the low urine output could potentially exacerbate fluid overload and further compromise the patient's condition.
A. Administer hydrocortisone (Solu-Cortef) 100 mg IV in (option A) is incorrect because: Hydrocortisone is commonly used in septic shock to help stabilize blood pressure and modulate the inflammatory response.
B. Giving PRN furosemide (Lasix) 40 mg IV in (option B) is incorrect because Furosemide, a loop diuretic, can be administered as needed to address fluid overload or to increase urine output if there is evidence of volume overload.
D. Titrate norepinephrine (Levophed) to keep systolic BP >90 mm Hg in (option D) is incorrect because: Norepinephrine is a vasopressor commonly used in septic shock to increase systemic vascular resistance and maintain adequate blood pressure.
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