Hey guys, I have been working on this problem forever and I cannot figure it out!! It is so frustrating. Can any of you help me out?? I just need to know how to go about it and I have no clue!!
Restricted Fluids: 1500 mL/24 hours
Primary IV of D5LR running via infusion pump
Ampicillin 3g IVPB q6h in 100 mL of D5W over 30 minutes each
Gentamycin 170 mg IVPB q8h in 50 mL NSS each to infuse over 1 hr
A. Calculate IVPB flow rates: Ampicillin: __mL/hr Gentamycin __mL/hr
B. Calculate the total IVPB time: ___ hrs
C. Calculate the total IVPB volume: ___mL
D. Calculate the total primary IV volume: __ mL
E. Calculate the total primary IV time: __ mL
F. Calculate the primary IV flow rate: __mL/hr
Thanks so much in advance!!
Jul 27, '13
Quote from mcicale2
Restricted Fluids: 1500 mL/24 hours
Primary IV of D5LR running via infusion pump
Ampicillin 3g IVPB q6h in 100 mL of D5W over 30 minutes each
Gentamycin 170 mg IVPB q8h in 50 mL NSS each to infuse over 1 hr
A. Calculate IVPB flow rates: Ampicillin: __mL/hr Gentamycin __mL/hr
B. Calculate the total IVPB time: ___ hrs
C. Calculate the total IVPB volume: ___mL
This is a great site...
DosageHelp.com  Helping Nursing Students Learn Dosage Calculations since this is your first math here lets break it down.
.......how fast does the pump need to go if you have to give 100mL of fluid over 30 min

100 ml (amount to give)/30 minutes (time over which it is to be infused) x 60 minutes/1 hour (conversion factor) = 200 ml/hour (infusion rate to program on the iv pump) 
Now the Gentamycin......
50mL (amount to give)/60min (time to be given) x 60min/1hr (your conversion factor) = 50mL/hr
If you are giving one 4 times (q6hr) in 24 hours over 30 mins
4doses x 30min = 120mins How many hours are in 120 mins 120min/60min/hr = 2 hours
and the other 3 times (q8hr) in 24 hours over 1 hour
3 doses at 1 hr a piece.....3 x 1 = 3 hrs
so the total in infusion time is
2 hours(for ampicillin) + 3 hours (for gentamycin) = 5 hours total IVPB infusion time
Now you need total IVBP volume. You have 100mL of one infusing 4times in 24 hours
100mL/1dose x 4 doses = 400mL
You also have 50mL of the other infusing 3 times in 24 hours
50mL/1dose x 3 doses = 150mL
So if one is 400mL total and the other is 150mL total the total is....
400mL + 150mL = 550ml total
Last edit by Esme12 on Jul 27, '13
Jul 27, '13
We now know these answers
A. Calculate IVPB flow rates: Ampicillin: 200mL/hr Gentamycin 50mL/hr
B. Calculate the total IVPB time: 5hrs
C. Calculate the total IVPB volume: 550mL
Lets figure out these
D. Calculate the total primary IV volume: __ mL
E. Calculate the total primary IV time: __ mL
F. Calculate the primary IV flow rate: __mL/hr
If we know that this patient has already received a total of 550mL's of IVfluid in meds alone...and they can have
NO MORE than 1500 in 24 hours....how much fluid is left over to give 1500mL (total allowed)  550mL (already given) is 950mL's left over to be given in the next 24 hours.
We know that the IV meds take up a total of 5 hours every day how many hours are left over to infuse the rest of the IVF. There is 24 hours in a day and 5 hours are already taken leaving 19 hours left over
Now we need to infuse the remaining 950mL of fluid over 19 hours.....at what rate would you set the IV pump?
The next one you will show me and figure out what you don't understand.
Last edit by Esme12 on Jul 27, '13