A nurse is preparing to administer nitroglycerine 15 mcg/min by continuous IV infusion. Available is nitroglycerin 25 mg in 250 mL of dextrose 5% in water (D5W). The nurse should set the IV pump to deliver how many mL/hr? (Round to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.
9
19
0.9
90
The Correct Answer is A
Convert the dosage to mcg per hour:
15 mcg/min×60 min/hr=900 mcg/hr15
Convert the available nitroglycerin concentration to mcg/mL:
25 mg=25,000 mcg
The concentration is(25,000 mcg/250 mL)=100 mcg
Calculate the flow rate in mL per hour using the dosage and concentration:
Flow rate (mL/hr)=(900 mcg/hr100 mcg/mL)=9 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A) The two main purposes for diuretics are to decrease fluid and decrease hypertension (lower blood pressure):
Diuretics primarily work by promoting the excretion of excess sodium and water from the body, which decreases fluid volume. This reduction in fluid volume helps to lower blood pressure, especially in conditions like hypertension and heart failure, where fluid buildup can exacerbate symptoms.
B) The two main purposes are to decrease fluid volume in the tissues and circulation, increasing blood pressure:
The primary purpose of diuretics is to decrease fluid volume, which helps lower blood pressure, not increase it. Diuretics are used to reduce the workload on the heart and the risk of complications like stroke and heart failure by lowering blood pressure and removing excess fluid from the body.
C) The two main purposes of diuretics are to increase fluid in the body and blood pressure:
Diuretics do not increase fluid in the body. In fact, they decrease fluid in the body to help reduce blood pressure. This option contradicts the fundamental mechanism of action of diuretics.
D) The two main purposes of diuretics are to increase circulating fluid and lower blood pressure:
Diuretics do not increase circulating fluid; they decrease it. By promoting the excretion of sodium and water, diuretics decrease the volume of circulating fluid, which is a key factor in lowering blood pressure.
Correct Answer is C
Explanation
Given:
Ordered dose of acetaminophen: 10 mg/kg
Child's weight: 22 lb
Concentration of acetaminophen liquid: 160 mg/5 mL
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 22 lbs x 0.453592 kg/lb = 9.976824 kg
Step 2: Calculate the total dose of acetaminophen:
Total dose (mg) = Ordered dose (mg/kg) x Child's weight (kg)
Total dose (mg) = 10 mg/kg x 9.976824 kg
Total dose (mg) = 99.76824 mg
Step 3: Calculate the volume to be administered:
Volume (mL) = Total dose (mg) / Concentration (mg/mL)
Volume (mL) = 99.76824 mg / 160 mg/5 mL
Volume (mL) = 99.76824 mg x (5 mL / 160 mg)
Volume (mL) = 3.1177575 mL
Step 4: Round to the nearest tenth:
Volume (mL) ≈ 3.1 mL
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