Dosage Calculation Question

Ok, I think I may have figured it out. A microdrop set equals 60gtt/min. So I have taken 54ml x 60gtt/min and divided that by 60 min. to come with an answer of 54gtt/min. I'm still not 100% sure I'm correct because I'm thinking there is still more calculating to be done. I need to think about this some more.

Ok I'm not sure if this is right. But I used what I had on hand first. 10mg per 1ml over 50mls=500mg. Then u take the 500 total volume and divide by 60= 8.333333 rounded off to 8 drops per min. The 4ml is to throw u off. Let me know what you come up with.

If you need 20 mg and the vial reads 10 mg/ mL, how many mL do you draw out of the via. HINT: the vial contains 4 mL which is 40 mg.

Take that number and add 50 mL for the D5W.

Divide that number by 60 to get ml/min

multiply that number by the tubing drop factor and you have your drops/min.

If you need 20 mg and the vial reads 10 mg/ mL, how many mL do you draw out of the via. HINT: the vial contains 4 mL which is 40 mg.

Take that number and add 50 mL for the D5W.

Divide that number by 60 to get ml/min

multiply that number by the tubing drop factor and you have your drops/min.

Thanks, Don! You hit on what I did eventually figure out, that your total mL will be 52, not 54 because the order is for 20mg, not 40mg. I knew there was something I was missing at first, it just took me a few extra minutes to figure out what it was.

phillygirl: The way I set up this problem is: total volume 52 x gtt factor 60 gtt/min divided by total time 60 min. to get a final answer of 52 gtt/min. Just like I learned on DosageHelp.com, which I discovered thanks to the helpful people of this site

gtt/min = total volume x gtt factor

total time---->

I can't get "total time" line up right, but I hope you get the idea.

just as a point of order --- please know that a microdrip set is 60 gtt/mL NOT 60 gtt/min.. :)

Ok I'm not sure if this is right. But I used what I had on hand first. 10mg per 1ml over 50mls=500mg. Then u take the 500 total volume and divide by 60= 8.333333 rounded off to 8 drops per min. The 4ml is to throw u off. Let me know what you come up with.

No. You don't have 10 mg/mL for all 50 mL of fluid. The medication is 10 mg/mL and OP needs to add 20 mg (2 mL) to 50 mL of fluid. The final concentration is WAAAAYYYY less than 10 mg/mL since she will have 20 mg/52 mL. 52 mL needs to be infused in one hour. Microdrip tubing is always 60 gtts/mL.

So your final problem would be:

52 mL/hr x 60 gtts/mL x 1 hr/60 min leaving you with 52 gtts/min. With microdrip tubing, the rate in mL/hr and gtts/min is always the same.

--------------------'

1 20

----x. =2

10

50+2=52

52×60 gtt.

-------------------- = 52 gtt/min

60 min.