![]() ![]() How this can be a little daunting and maybe Pound, but then they gave us the patient's weight, or Milliliters of solution do we have to give to We have to figure out theĭosage in terms of milliliters. Maybe we should say they mass, because kilograms is mass,īut we get the idea. Information we're given is that the patient- they weigh- and Milliliter out of my solution and give it to someone, I'mĮssentially giving them 0.9 grams of this drug. It's essential to write the 0 in front of the decimal. Grams for every milliliter that we have of the solution. It isn't just, you know, not just nuggets and milligrams. Pound of patient weight- I'll just write per pound of patient Unit conversion problem for pretty much anyone who wants It's essential that the nursing students out there are able toĭo this, just in case I'm the patient receiving the drug. It is important for a pharmasist to never mess up on conversions.Ĭalculation problem from a nursing student, and I think The words dose*day*mg in both the numerator and denominator cancel out giving the answer in mlĪnd the numbers 75*4*10*5/250 = 15000/250=60 Your numerator is 75*4*10*5mg*doses*days*ml The dose/dose and day/day cancel out leaving your answer in mg. Notice that the ml/ml on the left cancel out leaving you an answer in mg.ħ5 mg/dose * 4 dose/day * 10days = 3000 mgĪgain notice that the words mg*dose*day are in you numerator andĭose*day are in you demoniator. If you know ml and want to find mg you use Notice that the mg/mg on the left cancel out leaving you an answer in ml. If you know the mg and you want your answer is ml, you want to multiply The ml in numerator and denominator cancel, and it becomes 1/2 X 60 gtts/min.The secret to conversions is that words can cancel out each other just like numbers.1/2 ml/minute X 60 ggts/ml = 30 ggts/minute.If it's 4 mg per ml, then the 2 mg/min you've been ordered to drip means 1/2 ml/minute.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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