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Ms. Treish Good Job!! The hard work paid off. Keep these formulas in your memory. You will see it again!

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Ms. Treish Good Job!! The hard work paid off. Keep these formulas in your memory. You will see it again!

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Mindy Brown                           Safe Dose

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Mindy Brown                           Safe Dose

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I. Amount of drug per mL I
II. Infusion Rate mL/hour
I.  Amount of drug(D)/Total volume of diluent(V) = Amount of drug/mL
Ex.: 25,000 units/500 mL  18 mL = 720 units per mL
II.  Dose/h desired/Concentration/mL = Infusion Rate (IR) mL/hr
Ex. 800 units/50 units/mL = 16 mL/hr

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A 500 ml D5W solution with 2 grams of Pronestyl (procainamide HCL) is infusing at 15ml/h via a volumetric pump. How many mg/h is the patient receiving?

work: 2g = 2,000mg
2,000/500 = 4mg
4*15/1 = 60

answer: 60mg/h

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Typical Conversions

1 grain = 60 mg
1gram = 1,000mg
1Tsp = 5ml
1ml = 1cc
1kg = 2.2lbs
1 oz = 30cc
1 mg = 1,000 mcg

Desire/Have X Volume

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ml/hr

order: Levaquin 750mg in 500 ml of NS infuse over 90 minutes.
500/1.5 (because it is ml/hr)
answer: 333

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gtt/ min

volume x gtt over time
order: keflex 2 g in 100 ml D5W over 20 minutes iv tubing factor 15 gtt/ ml

100x15/20 =
answer 75 gtt/min

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Desire over have  x volume
order: rocephin 250 mg IM
available rocephin 1 gram in 5ml

250/1000 x 5 =
answer 1.25 ml

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Ms. Treish            Everyone post a type of calculation problem you expect to see on your test.  by Thursday.

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I remember this