answer...
To calculate the gtts per minute, we can use the formula:
gtts/min = (Volume to be infused × Drop factor × 60) ÷ (Time for infusion in minutes)
First, we need to convert the time for infusion from hours to minutes:
Time for infusion in minutes = Time for infusion in hours × 60
Time for infusion in minutes = 8 × 60
Time for infusion in minutes = 480
Now we can substitute the given values into the formula:
gtts/min = (500 mL × 15 gtts/mL × 60) ÷ 480
gtts/min = (45000 gtts) ÷ 480
gtts/min = 93.75
Therefore, the gtts per minute for the IV infusion of 500 mL of 0.45 NS over 8 hours at 63 mL/hr using a 15 mL drop factor is approximately 93.75 gtts/min.