An intravenous drip is infused at a rate of 4.5 milliliters per minute. How many milliliters are infused per hour?

Rationale

2,700 mL are infused per hour.

An intravenous drip rate of 4.5 milliliters per minute can be converted to an hourly rate by multiplying by the number of minutes in an hour, which is 60 minutes. Thus, the total volume infused in an hour is 4.5 mL/min × 60 min = 270 mL, resulting in 2,700 mL per hour.

A (2,700 mL) CORRECT

This choice is correct, as it accurately reflects the total volume infused over the span of one hour. By multiplying the infusion rate of 4.5 mL per minute by 60 minutes, we arrive at 270 mL, confirming that 2,700 mL is indeed the correct total volume infused in one hour.

B (75,000 mL) YOUR ANSWER

This choice is incorrect because it suggests an excessively high volume. If we multiply 4.5 mL/min by 1,000 minutes instead of 60 minutes in an hour, it mistakenly inflates the hourly total. The correct calculation limits the total to just 2,700 mL in one hour.

C (270,000 mL) YOUR ANSWER

Similarly, this option is incorrect as it represents a miscalculation of the infusion rate over time. This figure could arise from erroneously multiplying by 10,000 minutes, which is not the applicable duration for one hour. The correct total remains significantly lower at 2,700 mL.

D (0.075 mL) YOUR ANSWER

This choice is incorrect as it vastly underestimates the volume infused in one hour. It may stem from a misunderstanding of the conversion process or a miscalculation of the infusion rate. The correct calculation results in 2,700 mL, far greater than 0.075 mL.

Conclusion

To determine the total milliliters infused via an intravenous drip over an hour, one must multiply the per-minute rate by 60. The calculation reveals that 4.5 mL/min results in a total of 2,700 mL per hour, making this the only viable answer among the options. The other choices reflect significant errors in understanding the conversion of time and volume.

An intravenous drip is infused at a rate of 4.5 milliliters per minute. How many milliliters are infused per hour?

2,700 mL are infused per hour.

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