Over a 24 hour period of time, we're going to be getting 300ml again, the hours cross off here, and we're left with milliliters. With that antibiotic, they're going to be getting 100ml of fluid every 8 hours.
If we do that math, we end up with 1200ml. If we multiply times 24 hours, cross off our hours, that will give us how many milliliters they're going to get over 24 hour period of time. For the normal saline, we know that the patient is getting it at 50ml/hr. The problem asks, "How much IV fluids will the patient get in 24 hours?" We're going to handle each of these separately to figure out how much they're getting of each of these within a 24 hour period of time, and then add those together. Then they're getting a second IV antibiotic, every 12 hours. This particular antibiotic is in 100ml of fluid. Then in another IV, they're getting an IV antibiotic infused every 8 hours. In this problem, we're told that the patient is getting normal saline infused at 50ml/hr in one of their IVs. This is a problem that deals with calculating how much IV fluids a patient is getting in total, when they're receiving multiple infusions. This is the last problem I'm going to go over in this video. That's #8, hopefully that was helpful.Īnd we've got one more, Problem #9 next. Again, we're taking the order and we're just using converting factors to get to the unit of measure that is requested in the problem. If you do that, you end up with 25 drops per minute. Here we can see when we multiply this out, and divide, that we'll end up with drops per minute. We're going to have to say 1 hour equals 60 minutes, to allow us to cross off our hours. Our milliliters cross off here and we have drops per hour, but we want drops per minute. We want 500ml infused over 4 hours, and we know our drop factor is 12gtt/ml. Again, this is a scenario where we don't have an IV pump and we have to manually adjust the IV bag and the tubing to deliver a certain drop factor. We want to know how many drops per minute should be delivered to the patient. What we have is a drop factor of 12gtt (that means drops) per milliliter, as far as the tubing set up. In this scenario, we don't have an Alaris IV pump. In this problem, we have an order to infuse 500ml of normal saline over a 4 hour period of time. At this rate, it will take 4 hours for 500ml of fluid to infuse into the patient. If I do this calculation, I end up with 4 hours. We can cross off our milliliters and we'll end up with hours as our unit of measure, which is what it's asking for here in the question. The question asks us, “how many hours will it take for 500ml to infuse?” We have 500ml and we are infusing at 125ml/hr. In this scenario, our pump is running at 125ml/hr.
#7 deals with another IV pump calculation. That was not too bad, especially after the last one. But again, we're rounding to the nearest whole number. If we just do this division, we'll get the rate in ml/hr. Again, if you don't pay attention to that and you don't round, then that's going to be a problem and you're going to get it wrong. What is the pump rate in ml/hr? And we want to round to the nearest whole number.
Problem #6 has an order for 1000ml of some kind of IV fluid to infuse over 6 hours. As long as you keep gtt/ml and gtt/min straight the rest is just math.I'm going to go over some IV pump calculations now. The only things that makes it more complicated are fractions, decimals and rounding up to the nearest drop. This example seemed very easy, right? Well, it really is just that easy. 120mL/Hr ÷ 60(min/Hr) = 2mL/min We arrived at 2mL/min The Infusion set device delivers 10 gtt/ml, Now, simply take the amount of ml/min and multiply it by the gtt/ml. : The patient is prescribed: 720ml of mixture over 6 hours 720mL ÷ 6 Hrs = 120mL/Hr determine how much per Minute. Let's use an example similar to the one on the IV Infusion devices are calibrated to deliver so many Drops per Milliliter.Ī nurse will set the device to dispense so many drops per minute in order to achieve the proper ml/min. It is very important to never confuse the two. Drops per minute can be adjusted on the device. This is NOT to be confused with Drops per Minute (gtt/min). IV Infusion sets are pre-calibrated to how many drops per ml(gtt/ml) of a solution they administer to the patient.
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