For My Friends and Paramedic Students:
From hardest to easiest.
How To Figure Drip Rates:
Dopamine Infusion How to
Need three things for figuring a drip rate.
1. Dosage called for
2. Concentration of your supply (RATIO.. "Some number : 1")
3. What are the Drops per CC in your Drip Set?
Example:
Doctor says to start a dopamine drip and start at 10 mcg/kg/minute.
1.Dosage is 10 mcg/kg/minute. She weighs 137 pounds. 137/2.2 is 62.3 or just 62 kgs. 62kgs x 10 equals 610 mcg/minute.
2 Concentration. You have 400mg Dopamine in 250cc in a preloaded bag.
Do this in your head. How many times will 250 go into 1000? 4.
Multiply both numbers, 400 and 250, by 4 and you get 1600mg/1000cc. For the ratio you need some number to 1. 1000 is the magic number for the ratio computation because once you get it you can move the decimal point to the left three places in both numbers, reducing it down to a useable "some number to 1". In this case it is 1600mcg:1cc or 1600:1.
(Ask your instructor how to include extra fluid if you use a vial to mix into your fluid. Probably won't include it in you computations.)
3. You use a mini drip (60 drops/ml, 60 gtts/ml) for Dopamine. After you figure it a few times you will understand why a 10, 20, 30 won't work well with Dopamine. Be patient.
To compute simple infusion: It's easy. The dosage is 610mcg/minute. Ratio is 1600:1. So, 610mcg/1600mcg/ml= .38 ml. The mcg,s cancel out. (By inspection you can easily see that it will be less than 1/2 cc a minute at 10, checking your answer.)
Then, to find out how many drops per minute that is you multiply by the drops per ml in your set. .38x60=22.8 or 23.
For a simple IV KVO line like NS, 150/hour. Simple.
150cc/60minutes=2.5ml/minute multiplied by the gtts of your drip set. Let's say it is a 10 gtts/ml set.. 2.5 x 10 = 25gtts/minute.
If it is a simple drip of a drug, like Lidocaine, 1-4 mg/minute:
Dose...1-4 mg/minute.
Ratio...1 gram in 250...1000/250. You CAN simply do the math...1000/250 is 4. 4:1. 4mg/ML.
By inspection, 1 mg equals 1/4 ml. 1/4 of 60 is 15. So the rate range is 15-60 drops per minute.
You will be doing these in your head easily with a little practice.
Do a few of these. If your get stuck give me a call at 270-1374. Jim Self
From hardest to easiest.
How To Figure Drip Rates:
Dopamine Infusion How to
Need three things for figuring a drip rate.
1. Dosage called for
2. Concentration of your supply (RATIO.. "Some number : 1")
3. What are the Drops per CC in your Drip Set?
Example:
Doctor says to start a dopamine drip and start at 10 mcg/kg/minute.
1.Dosage is 10 mcg/kg/minute. She weighs 137 pounds. 137/2.2 is 62.3 or just 62 kgs. 62kgs x 10 equals 610 mcg/minute.
2 Concentration. You have 400mg Dopamine in 250cc in a preloaded bag.
Do this in your head. How many times will 250 go into 1000? 4.
Multiply both numbers, 400 and 250, by 4 and you get 1600mg/1000cc. For the ratio you need some number to 1. 1000 is the magic number for the ratio computation because once you get it you can move the decimal point to the left three places in both numbers, reducing it down to a useable "some number to 1". In this case it is 1600mcg:1cc or 1600:1.
(Ask your instructor how to include extra fluid if you use a vial to mix into your fluid. Probably won't include it in you computations.)
3. You use a mini drip (60 drops/ml, 60 gtts/ml) for Dopamine. After you figure it a few times you will understand why a 10, 20, 30 won't work well with Dopamine. Be patient.
To compute simple infusion: It's easy. The dosage is 610mcg/minute. Ratio is 1600:1. So, 610mcg/1600mcg/ml= .38 ml. The mcg,s cancel out. (By inspection you can easily see that it will be less than 1/2 cc a minute at 10, checking your answer.)
Then, to find out how many drops per minute that is you multiply by the drops per ml in your set. .38x60=22.8 or 23.
For a simple IV KVO line like NS, 150/hour. Simple.
150cc/60minutes=2.5ml/minute multiplied by the gtts of your drip set. Let's say it is a 10 gtts/ml set.. 2.5 x 10 = 25gtts/minute.
If it is a simple drip of a drug, like Lidocaine, 1-4 mg/minute:
Dose...1-4 mg/minute.
Ratio...1 gram in 250...1000/250. You CAN simply do the math...1000/250 is 4. 4:1. 4mg/ML.
By inspection, 1 mg equals 1/4 ml. 1/4 of 60 is 15. So the rate range is 15-60 drops per minute.
You will be doing these in your head easily with a little practice.
Do a few of these. If your get stuck give me a call at 270-1374. Jim Self
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