A nurse is preparing to administer 40 mEq of potassium chloride in 45% sodium chloride (NaCl) 500 mL IV to infuse 10 mEq/hr. The nurse should set the IV pump to deliver how many mL/hr? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["125"]
Step 1: Determine the total time required to infuse 40 mEq at a rate of 10 mEq/hr.
40 mEq ÷ 10 mEq/hr = 4 hours
Result: 4 hours
Step 2: Determine the infusion rate in mL/hr.
500 mL ÷ 4 hours = 125 mL/hr
Result: 125 mL/hr
The nurse should set the IV pump to deliver 125 mL/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A Reason: Dobutamine is a positive inotropic agent that increases the contractility of the heart and improves cardiac output. This leads to increased renal perfusion and urine output, which reduces the fluid overload and edema associated with heart failure. Therefore, this choice is correct.
Choice B Reason: Dobutamine does not have a direct effect on blood glucose level. It may cause hyperglycemia as a side effect, but this is not an indication of its effectiveness. Therefore, this choice is incorrect.
Choice C Reason: Dobutamine may cause a slight decrease in blood pressure due to vasodilation, but this is not its main therapeutic effect. A significant decrease in blood pressure may indicate hypovolemia, hypotension, or shock, which are adverse effects of dobutamine. Therefore, this choice is incorrect.
Choice D Reason: Dobutamine also has a positive chronotropic effect, which means it increases the heart rate. However, this is not a desired outcome for a client with heart failure, as it increases the oxygen demand of the heart and may worsen the condition. Therefore, this choice is incorrect.
Correct Answer is B
Explanation
Choice A Reason: Preventing musculoskeletal disability is important, but not the priority focus of care. The nurse should first assess and manage the client's life-threatening injuries, such as airway obstruction, bleeding, shock, or brain injury.
Choice B Reason: Airway protection is the priority focus of care for a client with multiple system trauma. The nurse should ensure that the client has a patent airway and adequate ventilation, as any compromise in these areas can quickly lead to hypoxia, respiratory failure, and death.
Choice C Reason: Stabilizing cardiac arrhythmias is also important, but not the priority focus of care. The nurse should monitor the client's cardiac rhythm and treat any arrhythmias that may occur, but only after securing the airway and breathing.
Choice D Reason: Decreasing intracranial pressure is another important goal, but not the priority focus of care. The nurse should assess the client's neurological status and intervene to prevent or reduce increased intracranial pressure, such as elevating the head of the bed, maintaining normothermia, and administering osmotic diuretics. However, these measures are secondary to ensuring adequate oxygenation and perfusion.
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