In gravity drip calculations, what units express the drop factor?

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Multiple Choice

In gravity drip calculations, what units express the drop factor?

Explanation:
The drop factor is the number of drops that make up one milliliter, so it’s expressed as drops per milliliter. In gravity drip calculations you use this to convert the desired volume (in mL) and the infusion time into a flow rate in drops per minute. For example, with a drop factor of 20 gtt/mL, 100 mL over 30 minutes translates into a certain number of drops per minute. Other options describe how fast or how much is delivered (rate or volume per time) rather than how many drops constitute a milliliter, so they’re not the drop factor.

The drop factor is the number of drops that make up one milliliter, so it’s expressed as drops per milliliter. In gravity drip calculations you use this to convert the desired volume (in mL) and the infusion time into a flow rate in drops per minute. For example, with a drop factor of 20 gtt/mL, 100 mL over 30 minutes translates into a certain number of drops per minute. Other options describe how fast or how much is delivered (rate or volume per time) rather than how many drops constitute a milliliter, so they’re not the drop factor.

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