## Question about infusion rate and time

by Jose
(Miami,FL USA)

I'm stuck on this question and cannot figure it out for the life of me:

An IV has been ordered to run at 2.5 gtts/min. The IV contains 875 mg of drug in a total of 250 ml. How many mg of drug will be given to the patient per hour if the IV is to set to deliver 15 gtts/ml?

A. 25 mg/hr

B. 35 mg/hr

C. 45 mg/hr

D. 55 mg/hr

## Comments for Question about infusion rate and time

 Aug 16, 2011 TD VA tic-tac-toe? by: Anonymous 30 5 parts of 30% 1015 20 parts of 15%25 total parts5/25= 0.20.2 x 2500 ml= 500 ml of 30%2500 ml - 500 ml= 2000 ml of 15%

 Jun 30, 2011 Answer to Infusion Rate and Time Question by: Anonymous (875mg/250mL) x (1ml/15gtt) x (2.5gtt/1min) x (60min/1hr) = 35 mg

 Mar 21, 2011 I'm stuck with this question , please help ..Thanks by: TD VA How many ml of 30% acetic acid must be mixed with 15% acetic acid to give 2500 ml of 10% acetic acid ?

 Mar 15, 2011 Here is the solution by: Anonymous ml/hr = gtt/min X 60 / factor = 2.5 X 60 / 15 = 10ml/hr875mg/ 250ml = 3.5 mg/ml3.5mg/ml = Xmg/ 10ml X = 3.5 X 10 X = 35mgAnswer is: 35mg/hr

 Feb 24, 2011 That's the correct answer, yes. by: Keith The best way to approach this type of question (besides neatly writing out each factor) is to do it in pieces. So, first figure out how many drops will drip in the hour.2.5 per min X 60 min = 150 drops/hr.I usually circle the answer and it becomes a new factor.Then, determine how many mL those drops make up.150 drops per hour/15 drops per mL = 10mL/hourNow, using the ratio of the solution provided, do a quick proportion math to see what's in 10 mL.875mg - - - X -______ = ________250mL - - 10mLX = The answer to how may mg/hr of the drug will be infused.

 Feb 24, 2011 MY ANSWER by: Anonymous I got 35 mg per hour.2.5/15=0.166 ml per min=10ml per hr875/250=3.5 mg per ml3.5mgx10ml per hour=35mg per hourI hope it is right! (I take my test today!)

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