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 D
Explanation
1. Convert patient weight from pounds to kilograms:
Patient weight (kg) = 152 lb x 0.453592 kg/lb = 68.94 kg
2. Calculate the desired dose in mcg/min:
Desired dose (mcg/min) = 5 mcg/kg/min x 68.94 kg = 344.7 mcg/min
3. Convert mcg/min to mg/min:
Desired dose (mg/min) = 344.7 mcg/min / 1000 mcg/mg = 0.3447 mg/min
4. Calculate the concentration of dobutamine in the solution:
Concentration (mg/mL) = 500 mg / 250 mL = 2 mg/mL
5. Calculate the flow rate in mL/min:
Flow rate (mL/min) = Desired dose (mg/min) / Concentration (mg/mL)
Flow rate (mL/min) = 0.3447 mg/min / 2 mg/mL = 0.17235 mL/min
6. Calculate the flow rate in mL/hr:
Flow rate (mL/hr) = 0.17235 mL/min x 60 min/hr = 10.341 mL/hr
7. Round to the nearest tenth:
Flow rate (mL/hr) = 10.3 mL/hr
Therefore, the correct answer is 10.4 mL/hr
Correct Answer is D
Explanation
A) Gamma globulin
Gamma globulin is a blood product used to provide passive immunity by supplying antibodies to prevent or treat certain infections. It is not used for digitalis toxicity, so A is incorrect.
B) Cardizem
Cardizem (diltiazem) is a calcium channel blocker primarily used for controlling heart rate and treating conditions such as atrial fibrillation or angina. It is not used as an antidote for digoxin toxicity, so B is incorrect.
C) Protamine
Protamine is a medication used to reverse the effects of heparin, an anticoagulant. It works by neutralizing the anticoagulant activity of heparin, but it is not used to treat digitalis (digoxin) toxicity, so C is incorrect.
D) Digoxin immune fab
Digoxin immune fab is the specific antidote for digoxin toxicity. It consists of antibodies that bind to digoxin molecules, thereby neutralizing their toxic effects on the heart. This antidote is used when a patient exhibits severe symptoms of digoxin toxicity, such as arrhythmias or life-threatening effects on the heart. Therefore, D is the correct answer.
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