and 250 ml by four in order to convert it properly? 2. _______________________________________________, IV bag Pounds x Kilos x ( Log Out / I mean, come on, it works for a 100 kg patient, but…”. In the pursuit of sharing the wealth, this fast method offers high accuracy across the board for any weight range, any IV bag size, and 5 to 20 mcg dose amounts. ( Log Out / ), THEN 2400 mcg per ml?
(Note: Originally posted with a typo, “800 mg” instead of the correct “400 mg” – but now corrected! Check it as many times as you want, you will be right on. “Brush up on medmath, DTs?” you say. Lessee here, this guy weighs 220lbs, which times 2.2 is 100kg, and we need 5 mikes/kg so that’s 100 kg * 5 is 500 micrograms per minute, and there’s 400 milligrams of medicine in 250 milliliters of D5w so that makes 1600 micrograms per milliliter…. would be ((160/2.2) * 5 * 60)/1600, or (72.73 * 300)/1600, or 13.64 ml/hr. 0.1875 = 3/16…. So, yeah, somebody somewhere is at some point gonna make the medic start a dopamine drip. Actually your method results in errors ranging from 6.67% at the lowest to 9.51% at the highest; always giving more dopamine than necessary. For vasopressor dosing, the math runs (9*kg)/16=ml/hr=kg*(9/16)=kg/1.77 repeating~lg/1.77. For this example we will use a 50 kilogram patient. Alright, well that’s great and all, but what about renal dosing? Dopamine Calculation.
0.44 110 ml 3636 mcg / ml 100kg / 5 = 20 * .0667 = 1.31 (20-1.32=18.68) or 18.7 gtts/min. Here is … Recommended Reading; Swag; Podcast; Easy Dopamine Calculation. In any case, you can also get the table as an Excel document. This is a 2.67% error! You will be required to solve problems that require you to understand: mcg/kg/min Before taking the quiz, don’t forget to watch the lecture on Dopamine IV drip calculations. What is the drip rate? Checked most of the calcs and it was pretty spot on. Thanks everybody!). I still don’t think that on my best day I ever set a drip set that accurately. DETERMINE Weight and multiply by factor shown: Pounds multiplied by 0.085 ( max 0.3% error differential ), Kilograms multiplied by 0.19 (exact is 0.1875) ( max 1.3% error diff. For instance, a patient weighting 160 pounds gets, by the Colorado method, (160/10)-2 = 14 ml/hour. so you could multiply the pt’s weight (kg) by 3, then divide by 16, that’ll give you the EXACT amount.. but easy at 2am? (And, I can’t fault you, when I reread this prior to posting, I noticed I had put the numbers in backwards. Please check with your medical direction before changing, adding to, or subtracting from your system’s protocols. Results are ML/HR ONLY for a med pump or a dial-a-flow / hour set, I apologize, i know I’m only a lowly EMT-B but shouldn’t it be, this guy weighs 220lbs, which times 2.2 is 100kg, and we need 5 mikes/kg so that’s 100 kg * 5 is 500 micrograms per minute, and there’s 800 milligrams of medicine in 250 milliliters of D5w so that makes 1600 micrograms per milliliter…. 100 ml (110) 0.0374 0.0836 Last week DTs began to brush up on med math, in preparation of precepting a rising medic with Major Transport Company. 0.44 ………………….110 ml……………. Share this: Email; Print; Tweet; 2 Replies to “Easy Dopamine Calculation” Mike Ziem says: April 18, 2017 at 11:15 am Dopamine is 2-20 mcg/kg/min. Interactions with EMS meds: albuterol, oxytocin, promethazine, digoxin, xopenex, isoproterenol, and lowers the effects of diabetic medications. Calculation for dose of Dopamine & Dobutamine. That’s what I thought, too, so I built a model (simple spreadsheet did for it) and ran the formulas head-to-head from a 50 lb patient through a 380 lb patient. 10 mcg multiply 18.7 by 2.0 = 37.40 gtts/min The 0.1875 comes from 5*60/1600 = 0.1875 which comes from (5mcg/kg) x (1ml/1600mcg) x (60min/hour). Easy Dopamine Calculation; IV Flow Rates; EKG Anatomy and Pathology; Medic-Tools; Links. When calculating the % error you should do (x’-x)/x as we need to know the difference from the true value. But as any medic will tell you, med math is one of those facets of EMS where everyone has their own method. 10 mcg / kg / min, multiply by 2. DETERMINE Weight and multiply by factor shown: I don’t think the most anal retentive person in the world can fault that, not to mention set a drip set that finely. 20 mcg / kg / min, multiply by 4. ), So, for cardiac dosing, again, as noted above, if you reduce the equation, you wind up with 3*kg/16=ml/hr, thus kg*(3/16)=mg/hr, but if you take that 3/16 and get the inverse, 16/3=5.33 repeating, thus kg/5.33 repeating=ml/hr. My preceptee-to-be has already expressed an interest in learning more in this fascinating area. The actual calculation, where (milliliters per hour) = (weight kg) * (dose mcg/kg/min) * (60 min/hour) / (concentration mcg/ml). Pounds multiplied by 0.085 ( max 0.3% error differential ) Unfortunately, this gives a much larger error rate…all the way up to a bit over 20 gtts/hr for our 300lb pt.
10 mcg / kg / min, multiply by 2. Low dose Dopamine should never be used in a field setting for increasing function of renal failure. I am an EMS educator in Dallas. If anyone has different values as I may be wrong. 15 mcg multiply 18.7 by 3.0 = 56.1 gtts/min. 1.04 260 1538 Marcus Prieskop | 11.01.08 – 6:12 am | #. “Shouldn’t you know this stuff?”. 20 mcg × 70 kg × 60 min 1000 mcg. Looking at this and double checking I think it’s pretty spot on. 4 ……………………..1000 …………………400. NOT drops per minute. Here is a sample word problem: You have a patient who weighs 220 lbs, and the doctor orders you to start a 5 mcg/kg/min dopamine drip.
Change ). cheers I wanted to use your page to show somone this method, but that error is too big for me to use, plus anyone who doesn’t do the math could make the mistake if they tried to use the method. Standard 400 mg Dopamine (10 ml vial) is mixed in IV bag In this case, they should be in micrograms. If the weight is in pounds, then divide the weight by 2.2 to obtain the weight in kilograms. 15 mcg / kg / min, multiply by 3 500 0.17 0.38 (And if you have a pump in your ambulance, I hate you.).
When setting up this problem you need to ensure that both the dose and concentration are expressed in the same unit. Since you’re reading this message then you’re living proof that contact form advertising works! 400mg of dopamine in 250ml D5w, kgs/5, set your drip. 15 mcg / kg / min, multiply by 3 Ratio and Proportion method, Formula method, Cross-multiplication, Three-Step, Rule-of-Fours, and so-on, when I came to Dopamine, and the Neat Thing. Now using kg/13.33 gives you an even better error rate, less than .16 gtts/hr for a 300lb pt! please let me know, as that would be very cool indeed. Obtain the patient’s weight in kilograms using a medically approved scale. Now, as the “down and dirty” implies, this is not exactly right. Thanks for your illuminating comment! 250 ml (260) 0.0884 0.1976
Ensure IV bag is 3 feet above patient to facilitate flow of infusion. The major problem (which I’ll try to address today, if I can find a way) in switching from a wholly by-hand blog such as I ran for almost six years, vs. WordPress, is there seems no quick way to import all the neat comments folks have left me. After ml / hr is calculated, to increase from 5 mcg / kg / min, to MULTIPLY BY For IV Bag (Actual Concentration) That’s your drip in milliliters per hour. 2 500 800 (exact: 784) ALways….. Fluids BEFORE Pressors… with consideration for Pulmonary Edema, Aneurism, CVA bleed, Cardiac Dysrhythmia, Pulmonary artery pressure (rare), angina, rebound hypertension from aggressive fluids/pressors/other meds, respiratory depression, tachycardia, reflex bradycardia, and vomiting among other things. 250 ml (260) …….0.0884 ……………0.1976
( Log Out / That constant error of 6.67% is because you’re dividing by 5, which is also multiplying by 0.2, instead of 0.1875. Obviously the dose, weight, and concentration will vary, however 60 is a constant. 1.04 ………………….260 ………………..1538 Now, dopamine is especially atrocious because different dosages seem to have different properties. (Dopamine dose x kg weight)/26.7 = the dose. For instance, 2mcg/kg/min is a “renal” dose, appropriate for maintaining renal function, while 5mcg/kg/min is considered an inotropic or “cardiac” dose, and 15+mcg/kg/min is the alpha agonist or “vasopressor” dosage, useful for maintaining blood pressure. Thanks so much for reading – and correcting! Convert: 5 mcg / kg / min, to ML/HR pump setting. The Colorado method is therefore 0.36 ml/hr off! I Will Findet…. 1000 …………………0.34 ……………….0.76. That’s your drip in milliliters per hour. James, thanks so much! So I was re-familiarizing meself with all the available methods, e.g. maybe not.. but i’m confused if 800mg in 250ml is 1600mcg/L ? 1 ml of commercially available contains 40 mg of dopamine.
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