An IV piggyback containing 120 mg of tobramycin sulfate (Nebcin) in 50 mL of D5W is to be infused over a 30-minute period. The IV administration set is calibrated to deliver 15 gtt/mL. How many drops per minute should be administered?
a. 8 gtt/min c. 40 gtt/min
b. 25 gtt/min d. 150 gtt/min
ANS: B
Feedback
A Incorrect: This rate is too slow.
B Correct: Divide 50 mL by 30 minutes = 1.67 mL/min multiplied by 15 = 25 gtt/min.
C Incorrect: This rate is too rapid.
D Incorrect: This rate is too rapid.
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