# Math Question!

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There is an order for fluid restriction on a patient with severe pregnancy-induced hypertension who is being induced with oxytocin. The patient has infusing LR 500 mL with 20 g magnesium sulfate added at the rate of 2.5 g/hr. The oxytocin 20 units is mixed in LR 1000 mL. The oxytocin infusion rate is 6 milliunits/min. The total fluid volume intake is not to exceed 125 mL/hr.

How many mL of water can the patient have PO per hour?

How would you figure out this question?

Edited by starlane

Specializes in Nursing Supervisor. Has 3+ years experience.

Not going to give the answer but I would.... figure out how many mls of fluids the pt is getting per hour (oxytocin and mag combined), subtract that from 125, and there's my answer.

Specializes in Critical Care, ED, Cath lab, CTPAC,Trauma. Has 41 years experience.

There is an order for fluid restriction on a patient with severe pregnancy-induced hypertension who is being induced with oxytocin. The patient has infusing LR 500 mL with 20 g magnesium sulfate added at the rate of 2.5 g/hr. The oxytocin 20 units is mixed in LR 1000 mL. The oxytocin infusion rate is 6 milliunits/min. The total fluid volume intake is not to exceed 125 mL/hr.

How many mL of water can the patient have PO per hour?

How would you figure out this question?

We are Happy to help with homework but need to see your work first.

This is a multi staged problem.....

The patient has infusing LR 500 mL with 20 g magnesium sulfate added at the rate of 2.5 g/hr. The oxytocin 20 units is mixed in LR 1000 mL. The oxytocin infusion rate is 6 milliunits/min. The total fluid volume intake is not to exceed 125 mL/hr.

First...what is the infusion rate of the 500LR with 20g MGSO4 at the rate of 2.5g per hour. How many ml/per hour is the patient receiving? (what is the pump set at)

Next...what is the infusion rate of 1000LR with 20u of oxytocin at the rate of 6mu/min. How many ml/hr is this? (what is the pump set at)

Then add part one to part 2 and get that total amount the patient is getting IV. Then subtract that from 125ml and get your total allowed po intake per hour.

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Show us the work and we will jump in to help....:)

What Esme12 said

in summary

Part 1

20g/500ml @ 2.5g/hr

xml/hr

Part 2

20 units/1000ml @ 6,000,000 units/min

xml/hr

Part 3

part 1 + part2 = ml/hr the pt is getting

part 4

125 ml/hr - part 3 = ml/hr the pt can have