Dosage calculation

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So I been struggling on these three dosage calculation problems!! Please tell me someone knows how to do these!!

1. Order Ancef 1 g in 100 ml of D5W IV PB to be infused over 45 min. Drop factor:got/ml. Calculate the flow rate____gtt/min

2. The order is to infuse 1300 mL in 8 hours using a 20 gtt/mL set. Calculate the gtt/min to the nearest whole number.

3. The drug label reads: 300-450 mcg/kg/day in 3 divided doses.

A. What would the lower per dose dosage in mcg be for a 136 IB woman?

B. What would the higher per dose dosage in mcg be for a 93 IB client?

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Specializes in NICU, ICU, PICU, Academia.

Well, what have you done so far? In order to help you, you need to do more than copy-paste the questions.

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Specializes in Public Health, TB.

I prefer to use dimensional analysis

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We have not went over this yet so I'm pretty much just taking a chance but for the first one I did it like this

1. 1000g/45*60= 1,333 I'm pretty sure that's wrong

2. 50mcg*50kg=2500/2=1250

3. I didn't do 3 because I figure it was like 2 and I'm not sure if I even did 2 or even 1 right

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Specializes in Pedi.
We have not went over this yet so I'm pretty much just taking a chance but for the first one I did it like this

1. 1000g/45*60= 1,333 I'm pretty sure that's wrong

2. 50mcg*50kg=2500/2=1250

3. I didn't do 3 because I figure it was like 2 and I'm not sure if I even did 2 or even 1 right

1. 1g is the dose not the volume. In order to calculate the flow rate, you need to use the volume in mL. You need to infuse 100 mL in 45 min, not 1,000 mL.

2. What you are doing here has nothing to do with the problem in your OP, which is to infuse 1300 mL in 8 hours using a 20 gtt/mL set. Calculate the gtt/min to the nearest whole number.

1300 mL/8 hrs = ? mL/hr. Use that to figure out your drops/min by converting mL to drop and hours to minutes.

3. Figure out the weight in kg and then multiply the higher and lower limits of the safe dose range by the weight. Keep in mind that your dose range is per day and the question asks you the safe range per dose.

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Specializes in Pharmacy, Mathematics, Physics, and Educator.

What is the drop factor on #1?

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