At a rate of 33.33 ml/min with 20 gtts/ml tubing, what is the flow rate in gtts/min?

To determine the flow rate in drops per minute (gtts/min), we start by using the formula that relates the volume flow rate with the drop factor. The drop factor is defined as the number of drops per milliliter, which in this case is 20 gtts/ml.

First, calculate the total volume flow rate per minute:

[

\text{Flow rate (ml/min)} = 33.33 , \text{ml/min}

]

Next, to find how many drops this volume represents, we multiply the volume flow rate by the drop factor:

[

\text{Flow rate (gtts/min)} = \text{Flow rate (ml/min)} \times \text{Drop factor (gtts/ml)}

]

Substituting in the known values:

[

\text{Flow rate (gtts/min)} = 33.33 , \text{ml/min} \times 20 , \text{gtts/ml}

]

Carrying out the multiplication gives:

[

\text{Flow rate (gtts/min)} = 666.6 , \text{gtts/min}

]

This calculation confirms that the flow rate is 666.6 gtts/min