First, determine the desired dose of Lasix in milligrams (mg). Your doctor’s order will specify this.
Next, obtain the concentration of the Lasix solution in mg/mL. This information is found on the medication label.
Now, calculate the volume needed. Divide the desired dose (mg) by the concentration (mg/mL). The result is the volume in milliliters (mL).
Determine the infusion time in minutes. Your doctor will specify the infusion rate or duration. Convert the time to minutes if necessary.
Finally, calculate the infusion rate in mL/min. Divide the volume (mL) by the infusion time (min). This is your final infusion rate.
Example: A doctor orders 40 mg of Lasix to be infused over 20 minutes. The Lasix solution is 20 mg/mL.
1. Desired dose: 40 mg
2. Concentration: 20 mg/mL
3. Volume: 40 mg / 20 mg/mL = 2 mL
4. Infusion time: 20 minutes
5. Infusion rate: 2 mL / 20 min = 0.1 mL/min
Always double-check your calculations and verify with a colleague before administering medication. Consult the medication’s package insert for complete instructions and precautions.
