study guide module 5 Flashcards
infusion is less than 100 mL/hr,
use a microdrip
infusion is 100 mL/hr or greater,
use a macrodrip
An infusion rate that is too slow can cause
physiological issues ESPECIALLY to
a patient who is dehydrated, in circulatory shock, or critically ill.
An infusion rate that is too fast will
overload the patient with fluids that can lead
to electrolyte and fluid imbalances AND cardiac complications in those that are
vulnerable.
Reason for slowing of IV flow:
slowed due to infiltration. Vasospasm, a knot or kink in
the line, external pressure on the tube, position change of patients extremity, or
possibility of patient lying/sitting on it.
If you like to memorize formulas, the following need to be committed to memory:
- ml/hr= total infusion (ml) ÷ hours of infusion
- ml/24 hours= total infusion (ml) ÷ 24 hours
- drops/min= ml/hr X drop factor ÷ 60 min
(example problem on back)
Example:
Order: 1000mls NS to infuse in 8 hours.
Drip Factor: 15 gtts/ml
1000ml ÷ 8 hours X 1 hour ÷ 60 minutes X 15 gtts ÷ 1ml= 31 drops per min
Example:
Order: 2000 mls NS to infuse in 24 hours.
Drip Factor: 10 gtts/ml
2000ml ÷ 24 hours X 1 hour ÷ 60 minutes X 10 gtts ÷ 1 ml= 14 gtts per min