An IV containing heparin in 250 mL of NS is infusing at 40 drops per minute....

An IV containing heparin in 250 mL of NS is infusing at 40 drops per minute. The infusion set is a microdrop. What is the infusion time? ( 1 drop = 4 microdrops, 1 mL = 15 drops = 60 microdrops)

Expert Solution

The formula for infusion time is = total volume in ML ÷ flow rate ML per hour .

So here 1 mL = 15 drops , total volume is 250 ML (given with heparin and normal saline )

To calculate infustion time we need total volume and flow rate in ml per hour , so total volume is 250 ml

To calculate flow rate in ML per hour we will calculate the drop per minute from the given value 250 ML . So the formula for calculating drop per minut is total volume in ML divide by time in minutes .

For example we will calculate 250 ML divide by 60 minutes which will give 42 drops per minute .

Now calculate this 40 drops per minute into ML per hour

So convert 42 drops per minute to ML per hour which will be 126 ML per hour .

Now , the infusion time will be total volume ÷ flow rate ml per hour

Which is 250 ÷ 126 = 1.98 minutes (118 minutes) , so the infusion time for 250 ML solution will be approximately 1.98 minutes that is 2 hours .

Nightingale answered 1 year ago

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