Using an IV infusion system that delivers 60 drops/mL, a nurse hangs a 500-mL bag of normal saline (NS) at 0800 . The physician has ordered a rate of 20 mL/hr. What should the nurse set the roller clamp to deliver?
a. 10 gtt/min
b. 20 gtt/min
c. 25 gtt/min
d. 30 gtt/min
B
20 mL (amount to be infused in 1 hr) x 60 gtt = 1200 gtt/hr. 1200 gtt รท 60 min in 1 hr = 20 gtt/min. This roller clamp is an old method to determine rates, but in the case of a nonavailability of electronic delivery devices, it is a good thing to know.
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