Dosage Calculation using Dimensional Analysis Part 2 NURS B 260

 Dopamine 400 mg in 250 mL of D5W is infusing at 18 mL/hr. Calculate the dosage in mg./hr. Answer in tenths. X mg. = 400 mg. x 18 mL hr. 250 mL 1 hr. Answer: 28.8 mg./hr. Competency 9: Calculate dosages for continuous drip medications in terms of weight/time measures (mg/hr, mcg/min, and mg/min)

Dopamine 400 mg in 250 mL of D5W is infusing at 18 mL/hr. Calculate the dosage in mcg/min. Answer as whole number. X mcg. = 1000 mcg. x 400 mg. x 18 mL x 1hr. min 1 mg. 250 mL. 1 hr. 60 min. Answer: 480 mcg./min Competency 9: mcg./min

 Lidocaine 2 g. in 500 mL of D5W is infusing at 30 mL/hr. Calculate the dosage in mg./min. Answer as whole number. X mg. = 1000 mg. x 2g. x 30 mL. x 1 hr. Min. 1 g. 500 mL. 1 hr. 60 min. Answer: 2 mg./min Competency 9: mg./min

“Medication” 400 mg in 250 mL of D5W is infusing at 12 mL/hr. Calculate the dosage in mcg./min. (Whole #) “Medication” 4 g. in 500 mL of D5W is infusing at 15 mL/hr. Calculate the dosage in mg./min. (Whole #) “Medication” 300 mg in 500 mL of D5W is infusing at 33 mL/hr. Calculate the dosage in mg./hr. (Tenths) Competency 9 Practice

X mcg. = 1000 mcg. x 400 mg. x 12 mL. x 1 hr. min. 1 mg. 250 mL. 1 hr. 60 min. Answer: 320 mcg./min. X mg. = 1000 mg. x 4 g. x 15 mL. x 1 hr. min. 1 g. 500 mL. 1 hr. 60 min. Answer: 2 mg./min. X mg. = 300 mg. x 33 mL. hr. 500 mL. 1 hr. Answer: 19.8 mg./hr.

Insulin 200 units in 500 mL NS is infusing at 17 mL. per hour via an infusion pump. How many units per hour are infusing? (Answer in tenths) X units = 200 units x 17 mL. hr. 500 mL. 1 hr. X = 6.8 units/hr. Competency 10: Calculate dosages for continuous drip medications in terms of the weight/time measures of units/hour

Heparin 25,000 units in 250 mL of D5W is infusing at 12 mL./hr. via an infusion pump. How many units per minute is the client receiving? X units = 25,000 units x 12 mL. x 1 hr. min. 250 mL. 1 hr. 60 min. X = 20 units/min Competency 10: Units/min.

Heparin 25,000 units in 500 mL. of D5W is to be infused at 25 mL./hr. How many units per min. will infuse? (whole #) Insulin 100 units in 250 mL. of NS is to be infused at 15 mL. per hour via Infusion pump. How many units per hour will infuse? (whole #) Competency 10 practice

X units = 25,000 units x 25 mL. x 1 hr. min. 500 mL. 1 hr. 60 min. Answer: 21 units/min. X units = 100 units x 15 mL. hr. 250 mL. 1 hr. Answer: 6 units per hour

Insulin 200 units in 500 mL NS is ordered to infuse at 8 units per hour. At what rate (in mL./hr.) will you set the IV pump? (Whole #) X mL. = 500 mL. x 8 units hr. 200 units 1 hr. X = 20 mL./hr. Competency 11: Calculate infusion rates for IV medications from dosage ordered in weight time measures of units/hr.

Pronestyl 4 g. in 500 mL of D5W is to infuse at 3 mg./min. At what rate (in mL./hr.) will you set the pump? (Answer in Tenths) X mL. = 500 mL. x 1 g. x 3 mg. x 60 min. hr. 4 g mg. 1 min. 1 hr. Answer: 22.5 mL./hr. Competency 11: Calculate infusion rates for IV medications from dosage ordered in weight time measures of mg./min

Epinephrine 4 mg. in 250 mL. D5W is to infuse at 6.1 mcg./min. At what rate will you set the IV pump (in mL./hr.)? Answer in tenths. X mL. = 250 mL. x 1 mg. x 6.1 mcg. X 60 min. hr. 4 mg mcg. 1 min. 1 hr. Answer: 22.9 mL./hr. Competency 11: Calculate infusion rates for IV medications from dosage ordered in weight time measures of mcg./min

Lidocaine 2 gm in 500 mL. D5W is to infuse at 3 mg./min. At what rate will you setthe IV pump in mL./hr.? (Answer as a Whole #) Heparin 20,000 units in 250 mL. of NS is to infuse at 1000 units per hr. At what rate will you set the IV pump in mL./hr? (Answer in tenths) Competency 11 Practice

X mL. = 500 mL. x 1 g. x 3 mg. x 60 min. hr. 2 g mg. 1 min. 1 hr. Answer: 45 mL./hr. X mL. = 250 mL. x 1000 units hr. 20,000 units 1 hr. Answer: 12.5 mL./hr. Answers

A client is to receive 300 mg. of a medication in 250 mL. of D5W at 14 mL./hr. The client weighs 86.7 kg. Calculate the mcg./kg./min. dose (Answer in tenths) X mcg. = 1000 mcg. x 300 mg. x 14 mL. x 1 hr. x 1 Kg./min 1 mg. 250 mL. 1 hr. 60 min kg. Answer: 3.2 mcg./kg./min. Competency 12: Calculate the dose in mcg/kg./min. for continuous drip medications when the weight of the client and infusion rate are given

Heparin 25,000 units in 250 mL. of D5W is is ordered for your client. The infusion rate is 10 mL./hr. via pump. Your client weighs 132 lbs. Calculate the units/kg./hr. your client is receiving. (Answer in tenths) X units = 25,000 units x 10 mL x 1 x 2.2 lb. kg./hr. 250 mL. 1 hr. 132 lb. 1 kg. Answer: 16.7 units/kg./hr. Competency 12: Calculate the dose in units /kg./hr. for drip medications when the weight of the client and infusion rate are given

A client is to receive 450 mg. of a medication in 250 mL. NS at 12 mL./hr. The client weighs 180 lb. Calculate the dose in mcg./kg./min. (Answer in tenths) Heparin 50,000 units in 500 mL. D5W is infusing at 45 mL./hr. The client weighs 81.8 kg. Calculate the units/kg./hr. your client is receiving. (Answer as whole #) Competency 12 Practice

X mcg. = 1000 mcg. x 450 mg. x 12 mL. x 1 hr. x 2.2 lb. x 1 kg./min 1 mg. 250 mL. 1 hr. 60 min. 1 kg. 180 lb. Answer: 4.4 mcg./kg./min X units = 50,000 units x 45 mL. x 1 kg./hr. 500 mL. 1 hr kg. Answer: 55 units/kg./hr. Answers

A client weighing 150 lb. has a drip of Dopamine 400 mg. in 250 mL. D5W. The order is to infuse at 2 mcg./kg./min. At what rate will you infuse via pump (in mL./hr.)? (Answer tenths) X mL. = 250 mL. x 1 mg. x 2 mcg. x 60 min. x 1 kg. x 150 lb. Hr. 400 mg mcg. kg./min 1 hr. 2.2 lb. 1 Answer: 5.1 mL./hr. Competency 13: Calculate the infusion rate for continuous drip medications when given client’s weight and ordered dose in mcg./kg./hr.

700 mg. of a medication is infusing via pump in 250 mL. of NS at the ordered 2.5 mg./kg./hr. Your client weighs 153 pounds. Calculate the infusion rate in mL./hr. Answer as whole number. X mL. = 250 mL. x 2.5 mg. x 1 kg. x 153 lb. hr. 700 mg. kg./hr. 2.2 lb. 1 Answer: 62 mL./hr. Competency 13: Calculate the infusion rate for continuous drip medications when given client’s weight and ordered dose in mg./kg./hr.

Your client who weighs 80 kg. is to have Heparin 25,000 units in 250 mL. NS increased to 10 units/kg./hr. Calculate this infusion rate in mL./hr. (Answer as whole #) X mL. = 250 mL. x 10 units x 80 kg. hr. 25,000 units 1 kg./hr. 1 Answer: 8 mL./hr. Competency 13: Calculate the infusion rate for continuous drip medications when given client’s weight and ordered dose in units/kg./hr.

1 g. of a medication is infusing via pump in 250 mL. of NS at the ordered 2 mg./kg./hr. Your client weighs 123 pounds. Calculate the infusion rate in mL./hr. (Answer as whole number) Your client who weighs 76 kg. is to have Heparin 25,000 units in 500 mL. NS increased to 7 units/kg./hr. Calculate this infusion rate in mL./hr. (Answer in tenths) Competency 13 Practice

X mL. = 250 mL. x 1 g. x 2 mg. x 1 kg. x 123 lb. hr. 1 g mg. kg./hr. 2.2 lb. 1 Answer: 28 mL./hr. X mL. = 500 mL. x 7 units x 76 kg. hr. 25,000 units 1 kg./hr. 1 Answer: 10.6 mL./hr. Answers

An infant weighing 6.9 kg. has an order for a medication with a recommended dosage range of 0.4 to 0.8 mg./kg. per day in 4 divided doses. What are the upper and lower dosages in mg./dose for this child for one dose? (Tenths) X mg. = 0.4 mg. x 6.9 kg. x 1 day 1 dose kg./day 1 4 doses X mg. = 0.8 mg. x 6.9 kg. x 1 day 1 dose kg./day 1 4 doses Answers: Lowest dose is 0.7 mg./dose Highest dose is 1.4 mg./dose Competency 14: Determine if dosages are within the dosage range relative to the client’s weight

Is 1 mg. p.o. four times daily a safe dose for a 6.9 kg. infant? Recommended dosage range of 0.4 to 0.8 mg./kg. per day in 4 divided doses. For this infant:  Lowest dose is 0.7 mg./dose  Highest dose is 1.4 mg./dose 1 mg. falls within 0.7 and 1.4 mg. per dose: YES X mg. = 1.0 mg. x 4 doses x 1 kg./day 1 dose 1 day 6.9 kg. Answer: 0.6 mg./kg./day (see above) and 4 times/day: YES Is this dose safe?

A child weighing 26.8 kg. has an order for a medication with a recommended dosage range of 1.5 to 2.1 mg./kg. per day in 3 divided p.o. doses. What are the upper and lower dosage for this child for one dose? (Whole #) Is 25 mg. three times per day p.o. a safe dose for this child? Competency 14 Practice

UPPER X mg. = 1.5 mg. x 26.8 kg. x 1 day 1 dose kg./day 1 3 doses LOWER X mg. = 2.1 mg. x 26.8 kg. x 1 day 1 dose kg./day 1 3 doses Answers: Lowest dose is 13 mg./dose Highest dose is 19 mg./dose NO—25 mg. is an unsafe dose X mg. = 25 mg. x 3 doses x 1 kg./day 1 dose 1 day 26.8 kg NO—2.8 mg./kg./day is an unsafe dose

Requisite Knowledge: First 10 kg. = 100 mL./kg./day Second 10 kg. = 50 mL./kg./day Remaining kg. = 20 mL./kg./day Calculate the daily fluid requirements fora toddler weighing 29 pounds. X kg. = 1 kg. x 29 lbs. Weight in kg.= 13.2 kg. 2.2 lbs mL mL. = 1160 mL./day Competency 15: Determine daily fluid requirements relative to the client’s weight

100 mL x 10 kg = 1000 mL + 50 mL x 3.2 kg = 160 mL _________________________________ 13.2 kg 1160 mL

 Calculate the daily fluid requirements for a child weighing 55 pounds.  Calculate the daily fluid requirements for an infant weighing 12 pounds. The child weighs 25 kg = 1600 mL./day The infant weighs 5.5 kg. 5.5 x 100 = 550 mL./day Competency 15 Practice

Congratulations! You’ve Practiced All 15 competencies