Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 Mix 400 mg dopamine in 250 cc D5W to get a concentration of 1600 micrograms/ml. Using a 60gtts/min administration set this gives you 1600 mics administered in every milliliter. Now picture a clock face. every minute mark on the clock face represents 26.66 mics of dopamine and one drop through the drip chamber. 15 drops is 400 mics/min. (think of the clock face--15 min is a quarter hour, so divide 1600 by 4 to get 400). 30 drops is 800 mics/min (30 min is half an hour so divide 1600 by 2). 45 drops is 1200 mics/min (3/4 hr. 1600 x 0.75). 20 drops is approx 533 mics/min (1600 divided by 3) etc. Mark Elliott LP, NREMT-P Dopamine Drips > Does anyone here know an easy way to figure out a Dopamine Drip? > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 Other than the dopamine wheel I know of no other map tricks except..... At 1600mcg/ml there is 26.6mcg/drop and you can do the math in your head! B. , LP Baylor Regional Medical Center at Grapevine EMS Educator Baylor EMS Medical Control 400 N. Main St. #104 Grapevine, Tx 76051-3300 Office Dopamine Drips Does anyone here know an easy way to figure out a Dopamine Drip? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 I think I meant to say " math tricks " NOT map tricks!!! B. , LP Baylor Regional Medical Center at Grapevine EMS Educator Baylor EMS Medical Control 400 N. Main St. #104 Grapevine, Tx 76051-3300 Office Fax Cell Cell e-mail 8179925662@... Hospital Pager Personal Pager pager e-mail 8174342094@... Dopamine Drips Does anyone here know an easy way to figure out a Dopamine Drip? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 First take your shoes and socks off. hjb txnremt wrote: > Does anyone here know an easy way to figure out a Dopamine Drip? > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 I don't know about easy- but here's one way. calculator preferred. Infusions should be administered using a 60gtt set. Take your drop factor (60) divided by the concentration per ml. Dopamine standard is 1600 mcg/ml. 60 divided by 1600 = 0.0375. Every drop that drips through that set contains 0.0375mcg of dopamine. Now, your patient & rate. Suppose your patient weighs 84 kg, and you want to run dopamine at 2-10mcg/kg/min. 84 x 2-10 = infusion rate range of 168 mcg/min to 840 mcg/min. Mulitlply amount per drop times the desired dose to get drops per minute. (0.0375 x 168 =) 6.3 to (0.0375 x 840=) 31.5. For the above patient, dopamine rate is 6.3 drops per minute to 31.5 drops perminute to infuse at 2-10 mcg/kg/min. Here's another- are you familiar with the clock method? It's especially helpful if your patient weighs a nice 100kg or so, but can also help you check other calculations. Draw a circle clockface to represent 1 minute, or 60 seconds. Assign the value of 60 at the top. Assign the values for 15, 30, and 45 seconds around the clock. The whole value (60 seconds) also represnts 1 ml using a 60gtt set, and the 'seconds' also represent the drops per ml. Your 'answer' using the clock method will be expressed in drops per minute. Next, apply your solution concentration per ml at the top, with the 60. Dopamine standard is 1600 mcg/ml. Assign the concentration value in 1/4 increments around the rest of the clockface: 15gtt = 400mcg, 30gtt = 800mcg, 45gtt = 1200mcg. 60gtt delivers 1600 mcg of dopamine, 30gtt delivers 800mcg, etc. Now, calculate for your patient. Suppose pt weighs 100kg. Your dopamine infusion range is 2-10mcg/kg/min, or 200-100mcg/min. At a glance of the clockface, you can see that 15 drops per minute delivers 400mcg per minute. Your patient's initial dose is exactly half that- 200mcg per min, or 7.5 drops per minute. At a glance, you can also see that the upper range will fall somewhere between 30gtt (800) and 45gtt (1200).,BUT the easiest way to figure the upper range is to mutlipy your inital times 5; 37.5 drops per minute. The range for 100kg pt at 2-10 mcg/kg/min, or 200-1000mcg/min, is 7.5gtt to 37.5 gtt per minute. The clock method is also helpful to check any patient. Take the first example. The calculation of 6.3 gtt/min to 31.5 gtt/min to deliver 168 to 840 mcg/min...accurate? At a glance you see that 15gtt delivers 400mcg, therefore half that, 7.5 gtt will deliver 200mcg. The calc of 6.5gtt to deliver 168 is reasonable, as is 31.5gtt to deliver 840mcg. Not an exact confirmation, but helpful just in case you screwed up a whole decimal place. Using the clock method to check yourself would quickly tell you there's something wrong if you've started the dopamine at 63 drops per minute instead of 6.3 > Does anyone here know an easy way to figure out a Dopamine Drip? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 Therefore the factor for an 800 ug bag would be 13.3. Larry Mc PJCEMSP Dopamine Drips > > Does anyone here know an easy way to figure out a Dopamine Drip? > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 > Ok, now I'm officially scared of paramedic school.... 8o) > > Tempy Don't be scared Tim. After so much studying and frustration it all comes together and makes sense. The Paramedic Field Guides also help alot too. :-) Regards, Alfonso R. Ochoa Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 Drug Infusion Based on Patient Weight ((desired dose * patient weight in Kg * dripset factor) / concentration of mixture) = drops/min Example: Mix 800mg of Dopamine into 500ml of D5W and administer to a 190 pound patient at 12mcg per minute. Note that we must make the measurement for the weight of drug into the same scale, be it mg or mcg. So we have several things to calculate. Remember to drip medications through a 60gtt/ml set. First, determine the patient weight in kilograms: 190 / 2.2 = 86.3636 Second, Concentration of mixture: 800 / 500 = 1.6mg/ml Third, we need concentration in micrograms since that is how dose was ordered: 1.6 * 1000 = 1600mcg/ml Fourth, we solve the problem: ((12 * 86.3636 * 60) / 1600) = 38.86 gtt/min Drug Infusion Based on Dosage (no patient weight involved) ((desired dose * dripset factor) / concentration of mixture) = drops/min Example: Mix 50mg of 'drug X' into 250ml of D5W and administer to the patient at 10mcg/min. First, determine concentration of mixture: 50/250 = 0.2mg/ml Second, convert concentration from milligram to microgram to match dosage ordered: 0.2 * 1000 = 200mcg/ml Third, solve the problem: ((10 * 60) / 200) = 3gtt/min Injection Dosage/Volume Calculations ((desired dose [mg] or [mcg] * volume [ml]) / Amount [mg] or [mcg] = ml to administer Example: Drug 'W' comes in a vial containing 25mg in 10ml. You are to administer 12mg to the patient. Solve the problem: ((12 * 10) / 25) = 4.8ml In this example 12mg is equal to 4.8ml Hope that helps... Bill > Dopamine Drips > > Does anyone here know an easy way to figure out a Dopamine Drip? > > > > > Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 23, 2004 Report Share Posted March 23, 2004 Pt weight in kilograms x dosage (5mcg-20mcg's)divided by 26.6(mcg's per drop)= drops per minute or ml per hour. This formula ONLY works if 2 conditions are met 60gtt set and 1600mcg per ml concentration. kg x wg / 26.6 = gtts/min or ml/hr easy, fast and accurate Verne Dopamine Drips Does anyone here know an easy way to figure out a Dopamine Drip? Quote Link to comment Share on other sites More sharing options...
Guest guest Posted March 24, 2004 Report Share Posted March 24, 2004 Quarters method. Dopamine Drips Does anyone here know an easy way to figure out a Dopamine Drip? ------------------------------------------------------------------------------ Quote Link to comment Share on other sites More sharing options...
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