IV calculations

Since Daytonite answered the calc problem, the c is supposed to have a line over it, means with.

Medical short hand written improperly another reason not to use abbreviations because when written wrong it can cause problems.

How many mg/min of the drug is the patient receiving?

Calculate the drip rate in gtts/minute for an infusion set with a drop factor of 60 gtts/mL

okay I am confused now! I understand the first part of the problem How you got .66..but if you are just trying to find the number of drips/min don't you ignore the mg? I am setting it up like this..

60gtts/1ml X 1000ml/60min =1000gtts/min ??? Have I looked at this too long?? Since there is 1000ML in 1 liter

How many mg/min of the drug is the patient receiving?

40mg/hour

(dose patient is receiving)

x 1 hour/60 minutes

(conversion factor)

= 0.666 mg/minute

, rounded off to

0.66mg/minute

Calculate the drip rate in gtts/minute for an infusion set with a drop factor of 60 gtts/mL

0.66mg/minute

(dose desired)

x 60 gtts/mL

(drop factor of IV tubing)

x 1 liter/600 mg

(dose on hand)

x 1000 mg/1 liter

(conversion factor)

=

66 gtts/minute

(drip rate)

When I did this according to my old calc book from first semester (because the problem bothered me, so I drug out the old book!), I got 40 gtts/min.

According to the book, Essential Drug Dosage Calculations:

-first determine the number of mLs/min to get the prescribed dose, which here is 40 mgs/hr out of 600mgs/liter. I did it the long way to check myself, and got the 0.67 (well, actually 0.666666.....).

The book now says to multiply the mLs/minute by the drip factor:

0.67(60) = 40.2 gtt/minute to give you 40 mg/hr.

All of the problems in the book are done this way, this is how we did them in school, and I never got a math problem wrong - either in didactic or in clinical. I also never killed anyone :nuke: or had any med errors in clinical. So if I'm doing something wrong now, please show me - and that's a sincere request. Sometimes this stuff confuses me because I over-think it...and it is late besides!

ETA: OH YES, I AM A TOOL - I left out half the calculation - remind me not to do math this late...

thanks!!! guess alot of people in class today were confused by this one......just too wordy........in my opinion......just a med error waiting to happen if this is an order......do we really have to figeure this out in the field? I know you have to know it for the nclex.......but are thy like this??

Yup..the instructor got o.66 for the first half....and 67 for the 2nd

40(dose desired)/600(dose on hand)x1000 volume=66.66 rounded to 67.....

thanks again....

hello this is my 1st time on ths website and im wondering i someone can help me i moved to fl from ny and there eqipment n way o doing things are way different...theyre iv pupms are very outdated n i cannot figure how to calculate on them...i have an ive bag that says its a 100ml bag of fluid n to inuse over 30 min..thats about all the info i get!!!! so on the pump u have to enter the pri rate and the vtbi now i know the vtbi is 100ml's but how am i figuring out the pri rate if i have no drip factor or anything??? the other day i had one that said 600mg/300ml infuse over 1hr can you please help me figure out theses iv issues!!! i feel like a complete mouron!!! i basically need to know how to figure out the pri rate

thanks so much!!!