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 B
Explanation
A. Suction subglottic area above the ETT cuff before entering the ETT. While subglottic suctioning helps prevent ventilator-associated pneumonia (VAP) by removing pooled secretions, it does not directly improve oxygenation during deep endotracheal suctioning. The priority is to optimize oxygenation before and after suctioning.
B. Use the ventilator settings to stack breaths prior to suctioning. Pre-oxygenating the client by delivering additional breaths via the ventilator helps prevent hypoxia during suctioning. Closed suction systems momentarily interrupt airflow, which can lead to oxygen desaturation. Providing 100% FiO₂ for 30–60 seconds before suctioning helps ensure adequate oxygenation and reduces complications.
C. Rinse suction catheters with normal saline between each suction pass. Flushing the catheter keeps it clean and patent, but it does not enhance oxygenation. Normal saline instillation before suctioning is not recommended, as it can increase infection risk and worsen secretion mobilization.
D. Suction for 30 seconds with each pass of the suction catheter. Prolonged suctioning can cause severe hypoxia, bradycardia, and airway trauma. Suction passes should be limited to 10–15 seconds to minimize complications. If additional suctioning is needed, the client should be reoxygenated between passes.
Correct Answer is A
Explanation
A. Insert a large bore peripheral IV catheter. The client is showing signs of shock (tachycardia, hypotension, tachypnea) likely due to envenomation and systemic venom effects. Rapid IV access is essential for fluid resuscitation, administration of antivenom, and management of shock. A large bore (18-gauge or larger) IV catheter allows for aggressive fluid therapy to maintain perfusion and prevent circulatory collapse.
B. Raise extremity above the heart. Elevating the limb can increase venom circulation, worsening systemic effects. Instead, the affected extremity should be kept at heart level to slow venom spread while ensuring adequate perfusion.
C. Tighten the cloth around the leg. Further tightening the makeshift tourniquet can lead to vascular compromise, ischemia, and increased local tissue damage. Modern guidelines discourage tourniquets as they do not prevent venom spread effectively and may worsen outcomes. The best approach is to loosen or remove restrictive bindings and keep the limb immobilized at heart level.
D. Apply ice over the bite mark. Cold therapy is contraindicated as it can worsen tissue damage by causing vasoconstriction, trapping venom, and increasing necrosis. Instead, the priority is IV access, fluid resuscitation, and preparing for possible antivenom administration.
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