The Nursing Math Thread

Mandychelle79, ASN, RN · Sep 15, 2011

For the first one. It is asking how much prepared formula can be hung. the order is for 50 mL per hour. Policy is 4 hours worth. 50 * 4= 200 mL

for the second one:

Ignore all the information except how much is ordered and what is the strength. You are trying to find how many tsps you need. the patient is order 40 mg of the solution per dose. the medication is 40 mg / mL. See if you can figure it out from there.

Nscorpiored, BSN · Sep 15, 2011

For the first one. It is asking how much prepared formula can be hung. the order is for 50 mL per hour. Policy is 4 hours worth. 50 * 4= 200 mL
for the second one:
Ignore all the information except how much is ordered and what is the strength. You are trying to find how many tsps you need. the patient is order 40 mg of the solution per dose. the medication is 40 mg / mL. See if you can figure it out from there.

Thank you that makes much more sense now

Nscorpiored, BSN · Sep 16, 2011

Hey thanks for the previous help if someone would help me with walking through these that would be great. For each one I did the basic calculations and still came out wrong it must be something I am doing

The physician orders 250 mL 0.9% NS to infuse over 2 1/2 hours. Calculate the mL/hr.

The order is to infuse 1 unit of packed red blood cells (275 mL) over 2 hours. Calculate the mL/hr.

These are working with Flow Rate

1. The nurse hangs up 1 L D5W to infuse over 8 hours. Use the following IV tubing label to calculate the flow rate.

Primary IV Set Non-Vented, 72" 60 drops/mL

8. The nurse is to infuse vancomycin 1 g in 250 mL 0.9% NS over 1 1/2 hours. The nurse selects a minidrop tubing (60 gtt/mL). Calculate the flow rate.

Ready-Set-Go · Sep 19, 2011

awesome thread!

Ready-Set-Go · Sep 19, 2011

so what you guys say the majority or math we need to know is ratio's and algerbra??? im starting my pre-reqs january but just want to practice since im a little weak on my math.

Thank you!!

ssellars06 · Sep 21, 2011

Is flow rate ml/hr? Had a math test and wanted to be sure!

Thanks

fallinnstyle · Sep 26, 2011

Heparin

Ordered/need dose 900 units/hr

have on hand 25,000 units in 500ml

how many ml/hr would you set your pump at?

please show me how to set up this....am having such a hard time with it.

ladynesh, BSN, RN · Oct 13, 2011

Does anyone know any good sites that have solution strength liquid concentration practice problems?

Example: The nurse is making up 1/3 strength Enfamil formula for 4 infants in the nursery.

How much water will be needed to make a total of 48 fl. oz of reconstituted 1/3 strength Enfamil?

____________mL(s)

This is taken from Dosage Calculations 8th Edition by Picker chapter 12

Vectrexevo · Oct 17, 2011

Does anyone know any good sites that have solution strength liquid concentration practice problems?
Example: The nurse is making up 1/3 strength Enfamil formula for 4 infants in the nursery.
How much water will be needed to make a total of 48 fl. oz of reconstituted 1/3 strength Enfamil?
____________mL(s)
This is taken from Dosage Calculations 8th Edition by Picker chapter 12

1440 ml of water... is it powder enfamil or liquid

Vectrexevo · Oct 17, 2011

heparin
ordered/need dose 900 units/hr
have on hand 25,000 units in 500ml
how many ml/hr would you set your pump at?
please show me how to set up this....am having such a hard time with it.

ml\hr = 500 ml \ 25000 units x 900 units \ hr = 500 ml x 900 units = 450000 \ 25000 = 18 ml\hr

MelissaLynn · Oct 20, 2011

It would be 16 oz. of Enfamil, 32 oz of sterile water to make a 48 0z solution.

ladynesh, BSN, RN · Oct 21, 2011

1440 ml of water... is it powder enfamil or liquid

Its a liquid, but I know how to do the problem. My question is does anyone know any websites that have practice problems like this....