Calculating IV prescribed drug dose in ml/hr
[Pages:5]Slide 2
Calculating IV prescribed drug dose in ml/hr
Calculating IV prescribed drug dose in ml/hr
Example 1 An IV of dextrose 5% in water containing 2 mg of Isuprel (isoproterenol) and a total volume of 1, 000 ml is to be infused at a rate of 5 mcg per minute. At how many ml per hour will you infuse the IV? To find the prescribed ml/hour: Step 1 ? Write down the dosage rate Step 2 ? Write down the IV strength Step 3 ? Write down the conversion factors Step 4 ? Reduce units Step 5 ? Perform the math
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Nsg 231 Calculating IV prescribed drug dose in ml/hr
Slide 3
Calculating IV prescribed drug dose in ml/hr
Example 1 An IV of dextrose 5% in water containing 2 mg of Isuprel (isoproterenol) and a total volume of 1, 000 ml is to be infused at a rate of 5 mcg per minute. At how many ml per hour will you infuse the IV?
To find the prescribed ml/hour:
Step 1 ? Write down the dosage rate Step 2 ? Write down the IV concentration Step 3 ? Write down the conversion factors Step 4 ? Reduce units Step 5 ? Perform the math
Step 1 Step 2 Step 3
Step 5
5 mcg x 1000 ml x 1 mg x 60 min =5 x 1000 x 1 x 60 ml = 300,000 ml=150 ml
1 min 2 mg 1000 mcg 1 hr 1 x 2 x 1000 x 1 hr 2,000 hr
hr
Step 4
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Nsg 231 Calculating IV prescribed drug dose in ml/hr
Slide 4
Calculating IV prescribed drug dose in ml/hr
Step 5 repeated
Another way to perform the math ?Reducing the numbers
1
1
30 x 2
= 5 x 1000 x 1 x 60 ml = 5 x 1 x 1 x 30 ml = 150 ml = 150 ml
1 x 2 x 1000 x 1 hr
1 x 1 x 1 x 1 hr
1 hr
hr
11
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Nsg 231 Calculating IV prescribed drug dose in ml/hr
Slide 5
Calculating IV prescribed drug dose in ml/hr
Example 2 An IV of dextrose 5% in water containing 2 mg of Levophed (norepinephrine bitartrate) and a total volume of 250 ml is to be infused at a rate of 7 mcg per minute. At how many ml per hour will you infuse the IV?
To find the prescribed IV ml/hour:
Step 1 ? Write down the dosage rate Step 2 ? Write down IV concentration Step 3 ? Write down the conversion factors Step 4 ? Reduce units Step 5 ? Perform the math
Step 1 Step 2 Step 3
Step 5
7 mcg x 250 ml x 1 mg x 1 min 2 mg 1000 mcg
60 min = 1 hr
7 x 250 x 1 x 60 ml = 1 x 2 x 1000 x 1 hr
105,000 ml 2000 hr
Step 4
= 52.5 ml/ hr rounds to 53 ml/hr
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Nsg 231 Calculating IV prescribed drug dose in ml/hr
Slide 6
Calculating IV prescribed drug dose in ml/hr
Step 5 repeated
Another way to perform the math ?Reducing the numbers
Step 5
1
1 4 x 15
=7 x 250 x 1 x 60 ml = 7 x 1 x 1 x 15 ml =
1 x 2 x 1000 x 1 hr
1 x 2 x 1 x 1 hr
4 x 250
11
105 ml 2 hr
Round the final answer to a whole number.
= 52.5 ml hr
53 ml hr
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Nsg 231 Calculating IV prescribed drug dose in ml/hr
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