You want to give 1000mls over 4 hours with 15gtts tubing. How many drops is that per minute?

To determine how many drops per minute you need to administer 1000 mLs over 4 hours using 15 gtts/mL (drops per mL) tubing, you'll first want to convert the total time into minutes.

Four hours is equal to 240 minutes (since there are 60 minutes in an hour, you multiply 4 by 60).

Next, calculate the total number of drops you will be administering. Since you are using 15 drops for every milliliter, you multiply the total volume (1000 mLs) by the drop factor (15 gtts/mL):

1000 mL * 15 gtts/mL = 15,000 drops.

Now, divide the total number of drops (15,000) by the total time in minutes (240):

15,000 drops ÷ 240 minutes = 62.5 drops per minute.

When rounding to the nearest whole number, this comes out to approximately 63 drops per minute. This rounding is often necessary in clinical settings, where practicality dictates that you administer whole drops rather than fractions.

Thus, the calculation leads to the answer of 63 drops per minute, which aligns with the correct answer in the provided choices.