In: Nursing
A physician orders Gentamycin 1.5 mg/kg/q8h
IVPB in 150 mL NS for a patient who weighs
148 lb. The infusion is to be infused at 25
gtts/min. The drop factor is 20 gtts/mL.
How many milligrams of Gentamycin should this
patient receive?
How long will it take for this medication to be
infused in minutes?
What total amount of Gentamycin will be infused
daily?
How many milligrams will the patient receive in
45 minutes?
A. The patient should receive 100.90 milligrams of Gentamicin.
B. It will take 120 minutes for the medication to be infused.
C. The total amount of Gentamycin that will be infused
daily is 302.7 milligrams.
D. The patient will be able to receive 37.69 milligrams of medication in 45 minutes.
Explanation:
A) In order to determine how many milligrams of Gentamicin the patient should receive, convert the patient's weight to kg first.
148lbs÷2.2lbs/kg= 67.27kg
67.27kg*1.5 mg/kg= 100.90mg
B. In order to determine how many minutes will it take for this
medication to be infused, first solve for the ml/min.
25gtts/min÷20gtts/ml= 1.25ml/min
Next, divide the total volume by the ml/min.
150ml÷1.25ml/min= 120minutes
C. In order to determine the total amount of medication to be
infused daily(24 hours), take note of your answer in A. It is
administered every 8 hours.
24hours÷8 hours= 3
The medication will be administered 3 times a day so,
100.90mg *3= 302.7mg
D. In order to determine how many milligrams will the patient
receive in 45 minutes,first determine how many milligrams of
medication is there in 1 ml of the IV solution.
100.90mg ÷150ml= 0.67mg/ml
Next, determine how many ml will be delivered in 1 min.
25gtts/min÷20gtts/ml= 1.25ml/min
Then, multiply by 45 min.
1.25ml/min.*45min= 56.25ml
Lastly, solve for the equivalent of 56.25 ml in mg.
56.25ml*0.67mg/ml= 37.69mg