The patient was started on a Lasix drip and transferred to the cardiac floor. The concentration of the Lasix drip is 64mg/250mL D5NS. The prescription is for the drip to deliver 4mg of Lasix per hour. How many hours will the bag last?
To determine how many hours the bag will last, we can use the formula:
Hours = Total Volume / Flow Rate
Let's calculate each component:
Total Volume: The total volume of the Lasix drip bag is 250 mL.
Flow Rate: The prescription is for the drip to deliver 4 mg of Lasix per hour.
Now let's substitute these values into the formula:
Hours = 250 mL / 4 mg/hour
However, since we have different units, we need to convert either the volume or the dosage to the same unit. Let's convert the volume:
Hours = (250 mL) / (4 mg/hour) * (1 g / 1000 mg) * (1 hour / 64 mg)
Now let's perform the calculations:
Hours = (250 / 4) * (1 / 1000) * (1 / 64) = 0.9765625
Therefore, the bag will last approximately 0.98 hours.
To determine how many hours the bag will last, we need to calculate the flow rate of the Lasix drip.
First, we need to find out the amount of Lasix in each milliliter of the drip solution. The concentration of the Lasix drip is 64mg/250mL. To find the amount of Lasix in 1 mL, we can divide 64mg by 250mL:
Amount of Lasix in 1 mL = 64mg / 250mL = 0.256mg/mL
Next, we need to find the flow rate of the drip in mL per hour. The prescription is for the drip to deliver 4mg of Lasix per hour. Since the concentration of Lasix in 1 mL is 0.256mg, we can set up a proportion to find the flow rate:
0.256mg / 1mL = 4mg / x mL
To solve for x, we can cross-multiply and divide:
0.256mg * x mL = 4mg * 1mL
x mL = (4mg * 1mL) / 0.256mg
x mL = 15.625 mL/hour
Now that we know the flow rate is 15.625 mL per hour, we can determine how many hours the bag will last. The bag has a volume of 250mL, so we can divide the volume by the flow rate:
Hours = 250 mL / 15.625 mL/hour
Hours = 16 hours
Therefore, the bag will last for 16 hours.