Calculating IV Drug Dose Infusing per hour or minute ProCalc Nsg 232 Welcome to the Yavapai College Verde Learning Center Tutorial for the drug dose infusing per hour or minute.

Example 1 ProCalc Nsg 232 Welcome to the Yavapai College Verde Learning Center Tutorial for Calculating IV Rate in ml/hr for drug dosage based on weight

Calculating IV Drug Dose per Hour & Minute Example 1 Dextrose 5% in water with Amicar is infusing at a rate of 55 ml per hour. The IV solution was prepared by adding 5000 mg of Amicar to dextrose 5% in water. The final solution contains a total volume of 250 ml. How many mg are infusing per hour? How many mg are infusing per minute? To find the mg/hr: Step 1 – Write down infusion rate Step 2 – Write down IV concentration Step 3 – Reduce the units Step 4 –Perform the math To find the mg/minute: Convert the mg/hr In our first Example, (Read Slide) We use 4 steps to find the ml per hour. In step one we write down the infusion rate. In this example our rate is 55 ml per hour. In step 2 we will write down the IV strength. In this IV 5000 mg is contained in 250 ml of solution. We will write this as a fraction with ml in the denominator since our rate has ml in the numerator. In step 3 we reduce the unit labels crossing off the matching pairs of labels from the numerator and denominator. We are left with ml/hr which is what we wanted to find. In the last step we perform the math. Multiplying straight across the numerator we have 55 x 5ooo which is equal to 275,000. Multiplying straight across the denominator we have 1 x 250 which is equal to 250 Using a calculator or long division we find that 275,000 divided by 250 is equal to 1,100. The IV is delivering 1,100 mg/hr. We will convert to find the mg/minute. Step 1 Step 2 Step 4 55 ml 1 hr 5000 mg 250 ml 55 x 5000 mg 275,000 mg 1,100 mg hr x = = = 1 x 250 hr 250 hr Step 3

Calculating IV Drug Dose per Hour & Minute Example 1 Dextrose 5% in water with Amicar is infusing at a rate of 55 ml per hour. The IV solution was prepared by adding 5000 mg of Amicar to dextrose 5% in water. The final solution contained a total volume of 250 ml. How many mg are infusing per hour? How many mg are infusing per minute? To find the ml/hr: Step 1 – Write down infusion rate Step 2 – Write down IV concentration Step 3 – Reduce the units Step 4 –Perform the math To find the mg/minute: Convert the mg/hr To convert from hours to minutes we will use the equivalency of 1 hour equal to 60 minutes. Writing this as a fraction with hr in the numerator since our first fraction has hours in the denominator. Reducing the units by crossing off any matching pairs of unit labels from the numerator and denominator, we are left with mg/min which is what we are looking for. Multiplying straight across the numerator of our fractions we have 1100 x 1 which equals 1100. Multiplying straight across the denominator of our fractions we have 1 x 60 which is equal to 60. Using a calculator we have find that 1100/60 is equal to 18.333 . Round your answer to the nearest whole number. We are infusing 18 mg/min. Round your answer to the nearest whole number . We are infusing 18 mg/min. 1,100 mg hr 1 hr 60 min 1 ,100 x 1 mg 1,100 mg x = = = 18.33 mg/min 1 x 60 min 60 min

Example 2 ProCalc Nsg 232 Welcome to the Yavapai College Verde Learning Center Tutorial for Calculating IV Rate in ml/hr for drug dosage based on weight

Calculating IV Drug Dose per Hour & Minute Example 2 Your patient is receiving an IV of 250 milliliters of 0.9% NS with 500 milligrams of the Inocor. The flow rate is 15 milliliters per hour. How many milligrams per hour is your patient receiving? How many milligrams per minute? To find the mg/hr: Step 1 – Write down infusion rate Step 2 – Write down IV concentration Step 3 – Reduce the units Step 4 –Perform the math To find the mg/minute: Convert the mg/hr In our second Example, (Read Slide) We will use the same 4 steps to find the ml/hr. In Step 1 we write down the infusion rate. In this example the infusion rate is 15 ml/hr. In step 2 we write down the IV concentration . In this example the iv has 250 milliliters asnd contains 500 milligrams. In step three we reduce the units, crossing off matching pairs of unit labels in the numerator and denominator. We are left with mg per hour which is what we want to find. In step 4 we perform the math. Multiplying straight across the numerator we have 15 x 500 which is 8,000. Multiplying straight across the denominator we have 1 x 250 which is equal to 250. Using a calculator or long division we find that 8,000 divided by 250 is equal to 32. This patient Is receiving 32mg/hr. Step 1 Step 2 Step 4 15 ml 1 hr 500 mg 250 ml 15 x 500 mg 7,500 mg 30 mg hr x = = = 1 x 250 hr 250 hr Step 3

Calculating IV Drug Dose per Hour & Minute Example 2 Your patient is receiving an IV of 250 milliliters of 0.9% NS with 500 milligrams of the Inocor. The flow rate is 15 milliliters per hour. How many milligrams per hour is your patient receiving? How many milligrams per minute? To find the ml/hr: Step 1 – Write down infusion rate Step 2 – Write down IV concentration Step 3 – Reduce the units Step 4 –Perform the math To find the mg/minute: Convert the mg/hr To convert from hours to minutes we will use the equivalency of 1 hour equal to 60 minutes. Writing this as a fraction with hr in the numerator since our first fraction has hours in the denominator. Reducing the units by crossing off any matching pairs of unit labels from the numerator and denominator, we are left with mg/min which is what we are looking for. Multiplying straight across the numerator of our fractions we have 30 x 1 which equals 30. Multiplying straight across the denominator of our fractions we have 1 x 60 which is equal to 60. Using a calculator we have find that 30/60 is equal to 0.5 . 30 mg 1 hr x 1 hr 60 min = 30 x 1 mg = 30 mg = 0.5 mg/min 1 x 60 min 60 min

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