Math Assistance?!?!

bessiepig1 · Oct 11, 2009

everything looks right and for microdrip per minute, i would divide 62.5 by 60. hope that helps

tlc2u · Oct 11, 2009

1. an iv of 500 ml lr is to infuse over 8 hours. the drop factor is 60 gtt/ml.

how many ml’s will infuse per hour? 500/8*60 my answer is 62.5 ml/hr (which is correct as per answer sheet...

how many microdrops will infuse in one minute? what do i do for this?

i don't use the formula method, i use dimensional analysis because it works for all my drug dosage calculations and for me it is easier than trying to remember formulas. i can explain this to you using dimensional analysis. however if you still need a formula then maybe someone else will jump in with that.

to simplify dimensional analysis always begin your equation with what you want to find for your answer.

for your 1st question above it is ml/hr.

for the second question it is gtt/min

1st question: how many ml’s will infuse per hour?

begin with your 500 mls on top as that is how you will want your answer to be ml 500ml = 62.5 ml/hr

hr. 8hrs

2nd question: how many microdrops will infuse in one minute?

for this first you need to understand drops. iv tubing comes in a smaller diameter tubing (microdrops which is 60gtt/ml meaning 60 small drops must drip to make 1ml) or larger diameter tubing (macrodrop 10-20gtt/ml since these are large drops it only takes 10-20 drips to make 1ml). for math your problem generally states macro or micro or the number of gtt/ml. in the hospital the drop factor (10gtt/ml, or 20gtt/ml, or 60gtt/ml) is listed on the iv tubing package that you get from the supply room.

an iv of 500 ml lr is to infuse over 8 hours. the drop factor is 60 gtt/ml.

how many microdrops will infuse in one minute?

for microdrops we know this refers to 60gtt/ml. what you want to know is gtt/min.

start with gtts on top and use the information from your question.

gtt 60gtt x 500ml x 1hr = 35,000 = 62.5gtt/min

min ml 8hrs 60mins 480

the 1hr

60mins

i used in this problem is the conversion factor to convert from hours to minutes.

1. md orders iv of d5lr 500ml with 10 units of pitocin to run at 2 u/hr. what is the hourly rate you will set the iv pump? is this correct? 2u/10u * 500ml = 100ml/hr ??? this is the correct answer on the sheet but want to make sure my formula is correct d/h * v

want to find:

ml 500ml x 2u = 1000 = 100ml/hr

hr 10u hr 10

hope this helps.