milliunits

1. Can anyone provide help with the following med math problem:

Client is admitted to labor and delivery for a trial induction.
Order reads: Begin Pitocin at 2 milliunits per minute and increase by 1 milliunit every 15 minutes until 3 good contractions every 10 minutes.

Available: 500 mL of normal saline with 30 units of Pitocin.

What rate (mL/hr) should be set on the infusion pump to begin the infusion?

Thanks......
:spin:
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Joined: Sep '07; Posts: 27; Likes: 3

3. Quote from ljbutler
Client is admitted to labor and delivery for a trial induction. Begin Pitocin at 2 milliunits per minute and increase by 1 milliunit every 15 minutes until 3 good contractions every 10 minutes. Available: 500 mL of normal saline with 30 units of Pitocin. What rate (mL/hr) should be set on the infusion pump to begin the infusion?
To do this problem you need to know that Pitocin comes in 10 units per 1 mL and that when this 1 mL is added to 500 mL of IV solution it results in the solution containing 20 milliunits per mL of the IV solution (Reference: page 958, 2007 Intravenous Medications, 23rd edition, by Betty L. Gahart and Adrienne R. Nazareno). Therefore. . .a 500 mL solution with 30 units of Pitocin in it will contain 60 milliunits of the Pitocin.
Dose desired: 2 milliunits (mU)/minute
Dose on hand: 30 units/500 mL, or 60 mU/500 mL

500 mL/60 mU (dose on hand) x 2 mU/minute (dose desired) = 16.666 mL/minute, rounded off to 17 mL/minute
Last edit by Daytonite on Jan 22, '08
4. Quote from ljbutler
Can anyone provide help with the following med math problem:

Client is admitted to labor and delivery for a trial induction.
Order reads: Begin Pitocin at 2 milliunits per minute and increase by 1 milliunit every 15 minutes until 3 good contractions every 10 minutes.

Available: 500 mL of normal saline with 30 units of Pitocin.

What rate (mL/hr) should be set on the infusion pump to begin the infusion?

Thanks......
:spin:
just glad to find this dosage problem in milliunits. here's my answer...

1 Unit = 1000 milliunits (mU)

dose desired: 2 milliunits/min
dose on hand: 30 units/500 mL or 60 milliunits/mL (this is the dose concentration)

so: dose desired x dose concentration

2 milliunits/min x ml/60 milliunits = 0.033 mL/min
set on the infusion pump? 0.033 mL/min x 60 min/hr = 1.9 mL/hr or 2 mL/hr
5. Yep, that's a good explanation. I did it just a tad bit differently, basically just cancel out the units. But I'm looking at daytonite's explanation, I was wondering if you could explain that, because we got totally different answers..unless I'm wrong, but I thought 1000mu were in 1u

2mu x 1u x __500ml x 60min = 2ml/hr
min `1000mu``30u ``1hr
Last edit by kgh31386 on Aug 10, '09