A simple med calc that I can't seem to "get". What's up with that?

[Bortaz, MSN, RN]

Can someone show me an easy way to solve these 2 problems?

Order: Lidocaine hydrochloride to infuse @ 2 mg/min. The pharmacy sends 1 gram lidocaine hydrochloride in 250 ml of D5W. The IV infusion pump should be programmed to deliver how many ml/hr?_______________________

Order: Dobutamine 500 mg in 500 ml D5W, give @ 6 mcg/kg/min. Patient weighs 110 lbs. Set the flow rate on the infusion pump in ml per hour:____________________

I missed these on a quiz, and have over-analyzed them till I don't even know what I'm doing any more. A quiz is scheduled for Monday, to be made up of questions similar to these.

HALP PLZ

[Daytonite, BSN, RN]

order: lidocaine hydrochloride to infuse @ 2 mg/min. the pharmacy sends 1 gram lidocaine hydrochloride in 250 ml of d5w. the iv infusion pump should be programmed to deliver how many ml/hr?_______________________

by dimensional analysis (factor label method)

:

2 mg/minute

(dose desired)

x 250 ml/1 gram

(dose on hand)

x 1 gram/1000 mg

(conversion factor)

x 60 minutes/1 hour

(conversion factor)

=

30 ml/hour

(infusion rate)

order: dobutamine 500 mg in 500 ml d5w, give @ 6 mcg/kg/min. patient weighs 110 lbs. set the flow rate on the infusion pump in ml per hour:____________________

by dimensional analysis (factor label method)

:

6mcg/minute

(dose desired)

x 110 pounds

(patient's weight in pounds)

/2.2 pounds

(factor to convert patient's weight to kilograms)

x 500 ml/500 mg

(dose on hand)

x 1 mg/1000 mcg

(conversion factor)

x 60 minutes/1 hour

(conversion factor)

=

18 ml/hour

(rate to set on the infusion pump)

[Bortaz, MSN, RN]

Bless you, you sainted woman you.