Henke’s Medical- Math Dosage Exam
Questions
Questions and Answers ||A+ Greaded
An adult client has been prescribed streptomycin intramuscularly (IM) 1g/ day.
Each mL of streptomycin contains 500 mg. How many mL will the nurse
administer? - ANSWER ✔ 2 mL
1 g= 1000 mg
1000 mg/ 500 mg= 2
A primary healthcare provider orders tobramycin intramuscularly (IM) 6.6 mg/ kg
daily. The dosage strength of tobramycin is 10 mg/ mL. How many mL will the
nurse administer for each dose to a 158 lb client? - ANSWER ✔ 47.4 mL
2.2 lbs= 1 kg
158/ 2.2= 71.82 kg
71.82 kg x 6.6= 474
474/ 10= 47.4
The physician ordered 1000 mL of NS to run at 167 mL/ hour. How many hours
should it take for the IV to infuse? Round off the nearest whole number. -
ANSWER ✔ 6 hrs
1000 mL/ 167 mL= 5.988
The physician ordered 1000 mL NS to infuse over 10 hours with a drop factor of
15 gtt/ mL. Calculate the correct IV flow rate in drops per minute. Round off to the
nearest whole number. - ANSWER ✔ 25 gtt/ min
1000 mL/ 600 min multiplied by 15 gtt/ mL
The physician ordered 500 mL NS to run over 6 hours with a drop factor of 20 gtt/
mL. Calculate the correct IV flow rate to set on the infusion pump. - ANSWER ✔
83 mL/ hr
500mL/ 6 hr= 83.333
, The physician ordered 1000 mL of D5W to infuse over 16 hours with a drop
factor of 20 gtt/ mL. Calculate the correct IV flow rate in drops per min. Round off
to the nearest whole number. - ANSWER ✔ 21 gtt/ min
1000 mL/ 960 min multiplied by 20= 20.833
The physician ordered 1000 mL of D5W to infuse at 125 mL/ hour with a drop
factor of 10 gtt/ mL. How many hours will this IV run. - ANSWER ✔ 8 hours
1000 mL/ 125 mL
The physician ordered hydrocortisone sodium succinate 250 mg in 1000 mL over
10 hours with a drop factor of 10 gtt/ mL. What is the correct IV flow rate in drops
per minute? Use the standard formula to solve this problem. Round off to the
nearest whole number. - ANSWER ✔ 17 gtt/ min
1000 mL/ 600 min multiplied by 10= 16.66
The physician ordered a unit of 250 mL packed red blood cells to infuse over 4
hours with a drop factor of 10 gtt/ mL. Calculate the correct IV flow rate in mL per
hour. Round off to the nearest whole number. - ANSWER ✔ 63 mL/ hr
250 mL/ 4 hr
The physician ordered 500 mL of D5W to infuse over 8 hours with a drop factor
of 20 gtt/ mL. Calculate the correct IV flow rate in drops per minute. Round off to
the nearest whole number. - ANSWER ✔ 21 gtt/ min
500 mL/ 480 min multiplied by 20= 20.833
The physician ordered 500 mL D5 1/2 NS to run at 100 mL/ hour with a drop
factor of 60 gtt/ mL. Calculate the IV flow rate in gtt/ minute. Round off to the
nearest whole number. - ANSWER ✔ 100 gtt/ min
500/ 100= 5 hours
500 mL/ 300 min multiplied by 60
Questions
Questions and Answers ||A+ Greaded
An adult client has been prescribed streptomycin intramuscularly (IM) 1g/ day.
Each mL of streptomycin contains 500 mg. How many mL will the nurse
administer? - ANSWER ✔ 2 mL
1 g= 1000 mg
1000 mg/ 500 mg= 2
A primary healthcare provider orders tobramycin intramuscularly (IM) 6.6 mg/ kg
daily. The dosage strength of tobramycin is 10 mg/ mL. How many mL will the
nurse administer for each dose to a 158 lb client? - ANSWER ✔ 47.4 mL
2.2 lbs= 1 kg
158/ 2.2= 71.82 kg
71.82 kg x 6.6= 474
474/ 10= 47.4
The physician ordered 1000 mL of NS to run at 167 mL/ hour. How many hours
should it take for the IV to infuse? Round off the nearest whole number. -
ANSWER ✔ 6 hrs
1000 mL/ 167 mL= 5.988
The physician ordered 1000 mL NS to infuse over 10 hours with a drop factor of
15 gtt/ mL. Calculate the correct IV flow rate in drops per minute. Round off to the
nearest whole number. - ANSWER ✔ 25 gtt/ min
1000 mL/ 600 min multiplied by 15 gtt/ mL
The physician ordered 500 mL NS to run over 6 hours with a drop factor of 20 gtt/
mL. Calculate the correct IV flow rate to set on the infusion pump. - ANSWER ✔
83 mL/ hr
500mL/ 6 hr= 83.333
, The physician ordered 1000 mL of D5W to infuse over 16 hours with a drop
factor of 20 gtt/ mL. Calculate the correct IV flow rate in drops per min. Round off
to the nearest whole number. - ANSWER ✔ 21 gtt/ min
1000 mL/ 960 min multiplied by 20= 20.833
The physician ordered 1000 mL of D5W to infuse at 125 mL/ hour with a drop
factor of 10 gtt/ mL. How many hours will this IV run. - ANSWER ✔ 8 hours
1000 mL/ 125 mL
The physician ordered hydrocortisone sodium succinate 250 mg in 1000 mL over
10 hours with a drop factor of 10 gtt/ mL. What is the correct IV flow rate in drops
per minute? Use the standard formula to solve this problem. Round off to the
nearest whole number. - ANSWER ✔ 17 gtt/ min
1000 mL/ 600 min multiplied by 10= 16.66
The physician ordered a unit of 250 mL packed red blood cells to infuse over 4
hours with a drop factor of 10 gtt/ mL. Calculate the correct IV flow rate in mL per
hour. Round off to the nearest whole number. - ANSWER ✔ 63 mL/ hr
250 mL/ 4 hr
The physician ordered 500 mL of D5W to infuse over 8 hours with a drop factor
of 20 gtt/ mL. Calculate the correct IV flow rate in drops per minute. Round off to
the nearest whole number. - ANSWER ✔ 21 gtt/ min
500 mL/ 480 min multiplied by 20= 20.833
The physician ordered 500 mL D5 1/2 NS to run at 100 mL/ hour with a drop
factor of 60 gtt/ mL. Calculate the IV flow rate in gtt/ minute. Round off to the
nearest whole number. - ANSWER ✔ 100 gtt/ min
500/ 100= 5 hours
500 mL/ 300 min multiplied by 60
