A nurse is to administer Dobutamine (Dobutrex) 2.5 mcg/kg/min IV to a patient with severe heart failure who weighs 130 pounds. The pharmacy prepares a solution of 250 mg of Dobutrex in 500 mL D5W. How many mL of the medication should be administered to the patient per hour? Round your answer to the nearest whole number.
The Correct Answer is ["18"]
Step 1: Convert the patient's weight from pounds to kilograms. 130 pounds ÷ 2.205 (1 pound = 0.453592 kilograms) ≈ 58.97 kilograms
Step 2: Calculate the total dosage of Dobutamine required per hour based on the weight-specific dose. 2.5 mcg/kg/min × 58.97 kg = 147.425 mcg/min
Step 3: Calculate the infusion rate (mL/hr) using the concentration of Dobutamine in the prepared solution. The solution contains 250 mg of Dobutamine in 500 mL, which means there are 250,000 mcg of Dobutamine in 500 mL. To determine the mL/hr, divide the required dosage (147.425 mcg/min) by the amount of Dobutamine in 500 mL (250,000 mcg) and multiply by 500 mL (volume of the solution).
(147.425 mcg/min ÷ 250,000 mcg) × 500 mL ≈ 0.295 mL/min
To get the mL/hr, we convert the rate from minutes to hours (60 minutes = 1 hour):
0.295 mL/min × 60 min/hr ≈ 17.7 mL/hr
Round the answer to the nearest whole number:
Approximately 18 mL/hr of Dobutamine should be administered to the patient.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Hypovolemic shock is a life-threatening condition resulting from severe blood or fluid loss. The patient in this scenario exhibits signs of hypovolemic shock, such as low blood pressure, tachycardia, cool and clammy skin, and decreased urine output.
When assessing the prescription options, the nurse should consider the appropriateness of each intervention for hypovolemic shock. Plasmanate is a type of plasma protein fraction that is used for volume expansion in certain situations. However, in hypovolemic shock, the primary intervention is to restore intravascular volume promptly. Plasmanate alone may not be sufficient for rapid-volume resuscitation.
In hypovolemic shock, the initial management typically involves the administration of crystalloid solutions, such as Lactated Ringers or Normal Saline, to restore intravascular volume. Therefore, the prescription of Plasmanate as the primary intervention raises concerns and should be questioned by the nurse.
A. Dopamine (Intropin) 12 mcg/min in (option A) is incorrect because: Dopamine is a vasopressor medication used to increase blood pressure and cardiac output. It is a suitable option for hypovolemic shock to support blood pressure and tissue perfusion.
B. Dobutamine (Dobutrex) 5 mcg/kg/min in (option B) is incorrect because: Dobutamine is an inotropic medication that helps improve cardiac contractility and cardiac output. It can be beneficial in cases of hypovolemic shock with signs of poor cardiac function.
D. Bumetanide (Bumex) 1 mg IV in (option D) is incorrect because: Bumetanide is a loop diuretic used to promote diuresis. However, in the context of hypovolemic shock, diuretics are generally not the first-line treatment as they can further reduce intravascular volume and worsen the patient's condition.
It is essential for the nurse to consult with the healthcare provider regarding the prescription order of Plasmanate and consider alternative interventions for rapid volume resuscitation in hypovolemic shock.
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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