The healthcare provider (HCP) changes a prescription for a nitroglycerin IV infusion from 10 mcg/min to 15 mcg/min. The IV bag contains nitroglycerin 50 mg in dextrose 5% in water (DW) 250 mL. The nurse should program the infusion pump to deliver how many mL/hr? (Enter numerical value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["5"]
Calculation:
Calculate the New Nitroglycerin Dose in mcg/hour
Dose (mcg/hour) = Dose (mcg/min) × 60 min/hour
=15 mcg/min × 60 min/hour = 900 mcg/hour
Convert mcg to mg
Dose (mg/hour) = Dose (mcg/hour) / 1000 mcg/mg
=900 mcg/hour / 1000 mcg/mg
= 0.9 mg/hour
Calculate the Concentration of Nitroglycerin in the IV Bag
Concentration (mg/mL) = Total mg of Nitroglycerin / Total mL of Solution
=50 mg / 250 mL
= 0.2 mg/mL
Calculate the Infusion Rate = Infusion Rate (mL/hour)
=0.9 mg/hour / 0.2 mg/mL
= 4.5 mL/hour
Round to the Nearest Whole Number
4.5 mL/hour rounded to 5 mL/hour
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Administer furosemide IV over ten minutes. While slow IV administration is recommended to prevent ototoxicity, the priority concern is that milrinone and furosemide are incompatible when administered in the same IV line. The nurse must first ensure separate IV access before considering the administration rate.
B. Notify the healthcare provider (HCP) of the incompatibility of the two drugs. The nurse does not need to notify the HCP but should instead use a separate IV line or flush the line thoroughly before and after administration if only one access is available. Milrinone and furosemide should never be mixed, as their combination can cause precipitation, leading to catheter occlusion or embolization.
C. Infuse furosemide through a central line to prevent extravasation. Furosemide can be given peripherally or centrally, but the concern here is drug incompatibility, not extravasation. Furosemide is not a vesicant, so central line administration is not required unless no peripheral access is available.
D. Give furosemide through a separate IV access. Milrinone is incompatible with furosemide due to pH differences, which can lead to precipitation and potential catheter occlusion. To ensure safe administration, furosemide should be given through a separate IV line or, if no secondary access is available, the line should be flushed thoroughly before and after administration.
Correct Answer is B
Explanation
A. View the rhythm in another chest lead. While verifying the rhythm in another lead may help confirm the accuracy of the monitor, it does not address the immediate absence of a pulse and respirations. The client is in pulseless electrical activity (PEA), which requires immediate intervention rather than rhythm verification.
B. Begin chest compressions at a rate of 120 times a minute. The client has no palpable carotid pulse and no spontaneous respirations despite a sinus rhythm on the monitor, indicating pulseless electrical activity (PEA). PEA is a form of cardiac arrest where the heart shows electrical activity but fails to generate effective circulation. Immediate high-quality chest compressions are essential to maintain perfusion while addressing the underlying cause, such as hypovolemia or tension pneumothorax.
C. Auscultate all chest fields for muffled lung sounds. While assessing for muffled lung sounds may help detect conditions such as tension pneumothorax or hemothorax, it should not delay the initiation of CPR. Once compressions are started, the underlying cause of PEA can be investigated.
D. Observe for swelling at the fracture site. Swelling at the fracture site may indicate bleeding or compartment syndrome, but assessing the fracture should not take priority over initiating CPR. If hemorrhage is suspected as a cause of PEA, rapid fluid resuscitation should be initiated after starting chest compressions.
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