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The patient has levofloxacin 500 mg ordered once a day. The levofloxacin is available in 100 mL of normal saline and should be infused over one hour using tubing with a 60 gtt/mL drop factor. How many drops per minute should the levofloxacin be infused?

Answer :

Answer:

100 drops per minute, 100 gtt/min


Explanation:

The 500 mg of fluoroquinolone antibiotic levofloxacin (brand name Levaquin) mixed within 100 mL of normal saline to be infused over 1 hour.

The tubing through which it will be infused has a drop factor of 60 drops per mL (60 gtt/mL).

Given the volume of medication over a given amount of time and the drop factor, the amount of drops per minute that will be infused can be determined by multiplying to two rates together. The following formula can be used to represented in this calculation:

(volume to be infused / duration) × drop factor



Calculation:

The volume to be infused in the 100 mL. The duration of infusion is 1 hour, or 60 minutes (60 min). The drop factor is given as 60 gtt/mL

[tex]\frac{100mL}{60 min} (\frac{60 gtt}{mL})[/tex]

mL in both numerator and denominator will cancel each other out, leaving gtt/min as the remaining units.

[tex]\frac{100}{60min}(60 gtt)[/tex]
= 6000 gtt / 60 min
= 100 gtt / min

The levofloxacin is to be infused at a rate of 100 gtt/min.

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Rewritten by : Barada

The levofloxacin should be infused at 100 drops per minute.

To calculate the number of drops per minute:

Identify the total volume to be infused: 100 mL.

Identify the total time for infusion: 1 hour (60 minutes).

Use the formula: (Total Volume in mL / Total Time in minutes) x Drop Factor (GTT/mL) = Drops per minute.

Applying the values:

Total Volume: 100 mL

Total Time: 60 minutes

Drop Factor: 60 GTT/mL

Calculation: (100 mL / 60 minutes) x 60 GTT/mL

= 100 drops per minute.