Final answer:
To calculate the volume infused in 4.5 hours, multiply the rate of infusion (291.67 mL/hour) by 4.5 hours to get 1,312.515 mL, which rounds to 1,312.52 mL.
Step-by-step explanation:
If an intravenous infusion pump is set to infuse 1,750mL of normal saline in 6 hours, to find out how many milliliters will have been infused in 4.5 hours, we need to calculate the rate of infusion and apply it to the time of 4.5 hours.
The rate of infusion is calculated by dividing the total volume by the total time.
Rate = Total Volume / Total Time = 1,750mL / 6 hours = 291.67 mL/hour
Now, to find out the volume infused in 4.5 hours, we multiply the rate by the time of 4.5 hours:
Volume infused in 4.5 hours = Rate × Time = 291.67 mL/hour × 4.5 hours = 1,312.515 mL
When rounded to two decimal places, the volume infused is 1,312.52 mL.