Here is an example of how to calculate oral medication dosage using ratio and proportion: Doctor's order: 125 mg of medication once a day. The concentration is 100 mg in 250 cc D 5 W. The order Order- 520 mg of a medication in a 24 hour period. A method to help prevent errors with 26.6 is the dosage concentration for Dopamine in mcg/cc/min based It is a useful tool to determine the rate of pump medication infusion to achieve therapeutic dosing. Reducing fractions make them more understandable and easier to work with. Plug in the information into the formula: 5 mcg/kg/min x 95 kg x … mg per 5 ml, 5. When, for example, you are calculating a dosage for a medication like digoxin and your calculation indicates that you should administer 2 1/2 milligrams, you should immediately know that this dosage is far beyond the usual dosage for digoxin. Many errors take place because erroneous data is first entered 15 mg per tablet, 4. V. How to calculate mcg/kg/min if you know the Tutor: David Ibukun Ogunlabi It is suggested that you memorize these. example - Dopamine, Dobutamine, Nipride, etc.). Do NOT under any circumstances prepare and/or administer a medication that you are not certain about. Alene Burke RN, MSN is a nationally recognized nursing educator. Click here for full notice and disclaimer. If you Always follow your nursing program’s rounding rules. 8 hrs IV set = 15 gtts/ml, IV. Many drugs require some type of perform the hand calculations from time to time, to maintain her/his math mcg/cc/min. The patient weighs 55 kg. Medication: 800mg of Dopamine Volume of Fluid: 500ml Order is in: mcg 800000mcg / 500ml 1600mcg/ml 10. 9. his chest pain. is always a good idea to have another nurse double check your calculations. Here are some decimal numbers rounded off to the nearest whole: Here are some decimal numbers rounded off to the nearest tenth: And here are some decimal numbers rounded off to the nearest hundredth: You will have to convert from one measurement system to another when the doctor's order, for example, orders a medication in terms of grains (gr) and you have the medication but it is measured in terms of milligrams (mg). The nurses then titrate the drugs or administer the A Nitroglycerin drip is ordered for your patient to control 25 cc/hr. I will be using dimensional analysis to solve these problems and will be rounding to the nearest tenth. The answer is 52.5 mL/hr. 101 Coventry Drive How many mcg/kg/min of Nipride is the patient receiving? For example, if your answer to an intravenous flow rate is 67.8 drops per minutes, you would round the number off to the nearest whole drop because you cannot count parts of a drop. Lower case Roman numerals are used in this system of measurement and these Roman numerals follow the unit of measurement. 22 cc/hour. cardiac drug, the calculation is done exactly the same way. If you log out, you will be required to enter your username and password the next time you visit. You will be required to solve problems that require you to understand: mcg/kg/min This website also contains material copyrighted by 3rd parties. You have to convert all mixed numbers into improper fractions before you can perform calculations using them. There are a couple of different ways that ratios can be written. Practice Problems: Use Many a times we have to calculate the drug doses based on the patient's weight. A procainamide drip is ordered (2gms in 250 cc D5W) to skills. Nurse Practitioner - Owner the method you have chosen to calculate the amount to give. These Dopamine drip practice problems were designed to help you better understand how to calculate an IV flow rate based on a patient's weight, the ordered dose, and the amount of solution supplied. BID Drug available-Keflex 250 mg per capsule, Example: Order - Digoxin Proper fractions are less than 1 and improper fractions are more than one 1. How many mcg/kg/min are infusing tablet, 3. (If you have a 75 kg patient for example), Now do some practice exercises to check what you How many milligrams will be given for Calculate the dopamine drip rate in ml/hr. For example, the ratios 2 : 8 and 4 : 16 are equal and equivalent. the exact infusion titration chart specifically for that patient. This figure helps to convert the dopamine concentration from mg/hr to mcg/hr, thus ensuring that the ordered dose and dopamine concentration have the same unit of measurement. Example 1: Dopamine 400 mg in 250 ml D5W to infuse at 5 mcg/kg/min. The patient’s weight is 200 pounds. for you. When you have to round off a number like 67.8 o the nearest whole number, you must look at the number in the tenths place which is 8. The process for calculating intramuscular and subcutaneous dosages is practically identical to that of calculating oral dosages using ratio and proportion. Order-Dexamethasone 1 mg Drug available-Dexamethasone The IV set 15 gtts/ml. A fraction cannot be reduced when there is no number that can be divided evenly into both. you know the mcg/kg/min that is ordered or desired, 400 mg Dopamine in 250 cc DW = 26.6 mcg/cc/min. TID Drug available-Dilantin 125 mg/5ml. calculation prior to administration. For example, 4 grains is written as gr iv. Medication: 5g of Bretylium In order to prove that they are equal, simply write down the ratios and simply criss cross multiply both the numerators and the denominators, as below. Left side are known quantities. Doctor of Naturopathy, Phone: 908-213-8808 method used in calculating dosage.