![]() Then divide by the concentration of 4 mg/ml. Since you're using a 60 drop set, you multiply your VTBI by the drip factor.First, convert grams to milligrams: 2 g → 2000 mg.Since the formulas used call for mg, ml, and minutes, You're ordered to infuse lidocaine at 2 mg/min. Morphine comes in 10 mg vials, your dose on hand would be 10 mg even if you're desired dose was only 4 mg. "Dose on hand" refers to the total availability of the drug in each unit of distribution (bag, vial, etc). VTBI (volume to be infused) x Drop Factor ÷ by concentration. You have a vial that is labeled 200 mg/5 ml, so you need the concentration (mg/ml):ģ) 200 mg/5 ml = 40 mg/ml = CONCENTRATION.ĥ) Multiply by the drop set to get a Weight-based IV drip. (Pounds to Kg is going smaller to bigger.)Ģ) Then we can multiply the weight in kilograms by the dosage ordered/hr to get the required dose/hr In this case:Īfterward, plug the desired dose into our regular drug calculation formula of the desired dose (here, 100 mg) divided by the amount on hand and then multiply by drop set to get a Weight-based IV drip.įor example, in this example, you need to give 100 mg/hr of this drug. (Kg to pounds is going bigger to smaller.) (e.g., 5 lbs x 0.45 = 2.25 kg.) An easy way to remember the difference is to think: You won't ever have to convert kg to lbs, but if you did, you'd multiply the lbs by 0.45. So if 5 mg/kg/hour is the order for your patient who weighs 44 pounds, from a solution of 200 mg in a 5-ml vial, you derive the following by determining the kg, concentration, then applying the equalities for gtts and minutes:ġ) We first need to turn 44 lbs into kilograms.Ĥ4/2.2 = 20. (So it takes 60 drops in a microdrop set to deliver 1ml of the drug.) microdrip IV set which is used for smaller volumes of administration: 60 drops per milliliter-60 gtt/ml.macrodrip IV set which delivers larger volumes and rates: 10 drops per milliliter-10 gtt/ml and.The two most common types of automated devices to deliver IV medication are In the old empiric system, 15 drops = ml.ĭifferent pipettes can create different sized drops.Weight (kg) x Dosage Ordered (per kg) = Required Dose. Use the following formula to get your total required dose:
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