In: Nursing
1) Order: 5 mcg/kg/min for a pt that weighs 194 lbs. You have
400 mg in a 250 mL of NS
What is the flow rate? _____________
What is the drop rate if the tubing is rated at 60 gtt/mL?
______________
Ordered dose = 5 mcg/Kg/min
Pt weight= 194 lbs
Convert pt weight from kg into the pound
1 kg = 2.2 lbs
194 lbs = 194/2.2 = 88.1 kg
Calculate pt dosage
Dose = 5 mcg/Kg/ min
Dose as per pt weight
= 88 × 5 = 440 mcg/ min
For an hour , the dose
= 440 × 60 = 26400 mcg/ hr
Convert the dosage mcg into mg
1 mg = 1000 mcg
1000mcg = 1 mg
26400 mcg = 26400/ 1000 = 26.4 mg/ hr
Calculate the flow rate
Flow rate ( ml/hr) = Ordered dose per hour/ Dose on hand × Volume
= 26.4 mg/ hr/ 400 mg X 250 ml
= 0.066 X 250
= 16.5 ml/ hr
Flow rate = 16.5 ml/ hr
Calculate drop rate
Total infusion time = Total volume/ Flow rate
= 400/ 16.5 = 24.24
Total infusion time = 24 ( rounded off)
Drop rate = Total volume of infusion × drop factor/ Total time of infusion in minutes
Total volume of infusion = 400
Drop factor = 60 gtt/ min
Total time of infusion = 24 × 60 ( to convert into min)
Drop factor = 400 × 60 / 24× 60
Drop factor = 16.6 drops/ min