A patient weighing 132 lb is prescribed lorazepam 44 mcg/kg IV to be administered 20 minutes before a scheduled procedure.
The medication is available in a 2 mg/mL vial.
How many mL should the nurse administer? Round off to 2 d.p.
(This is a medical math nd does not require options.)
The Correct Answer is ["1.32"]
Step 1 is to convert the patient’s weight from pounds to kilograms. There are approximately 2.2046 pounds in 1 kilogram. So, the patient’s weight in kilograms is 132 lb ÷ 2.2046 = 59.87 kg.
Step 2 is to calculate the total dose of lorazepam the patient should receive. The prescribed dose is 44 mcg/kg. So, the total dose in micrograms is 44 mcg/kg × 59.87 kg = 2634.28 mcg.
Step 3 is to convert the total dose from micrograms to milligrams. There are 1000 micrograms in 1 milligram. So, the total dose in milligrams is 2634.28 mcg ÷ 1000 = 2.63428 mg.
Step 4 is to calculate the volume of lorazepam solution to administer. The concentration of the solution is 2 mg/mL. So, the volume in milliliters is 2.63428 mg ÷ 2 mg/mL = 1.31714 mL. Therefore, the nurse should administer approximately 1.32 mL of the lorazepam solution, rounding to the nearest hundredth as required.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Increased BUN and serum creatinine are not typically symptoms of mononucleosis. These laboratory findings are more commonly associated with kidney dysfunction.
Choice B rationale
Ear pain and fever can be symptoms of many illnesses, including mononucleosis. However, they are not the most specific symptoms of this condition.
Choice C rationale
A positive Epstein-Barr virus test and malaise are common symptoms of mononucleosis. The Epstein-Barr virus is the most common cause of mononucleosis.
Choice D rationale
Elevated WBC and sedimentation rate can be seen in many inflammatory or infectious conditions, including mononucleosis. However, they are not the most specific symptoms of this condition.
Correct Answer is B
Explanation
Choice A rationale
A blood pressure of 100/60 mm Hg is not typically considered a risk for patients receiving eptifibatide. While eptifibatide can cause hypotension, a blood pressure of 100/60 mm Hg is within normal limits.
Choice B rationale
The presence of hematemesis, or vomiting blood, poses the greatest risk to the patient. Eptifibatide is a glycoprotein IIb/IIIa inhibitor that prevents platelets from clumping together by blocking the action of certain proteins. This can increase the risk of bleeding, including gastrointestinal bleeding, which could manifest as hematemesis.
Choice C rationale
Incontinence with blood in the urine could indicate a urinary tract infection or other urinary system issue, but it is not typically associated with the use of eptifibatide.
Choice D rationale
Unresponsiveness to painful stimuli is a serious symptom that could indicate a number of issues, including neurological damage or severe illness. However, it is not typically associated with the use of eptifibatide.
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