Dosage Calculation using Dimensional Analysis Part 2 NURS

Dosage Calculation using Dimensional Analysis Part 2 NURS B 260

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 m. L of D 5 W is infusing at 18 m. L/hr. Calculate the dosage in mg. /hr. Answer in tenths. X mg. = 400 mg. x 18 m. L hr. 250 m. L 1 hr. Answer: 28. 8 mg. /hr.

Competency 9: mcg. /min Dopamine 400 mg in 250 m. L of D 5 W is infusing at 18 m. L/hr. Calculate the dosage in mcg/min. Answer as whole number. X mcg. = 1000 mcg. x 400 mg. x 18 m. L x 1 hr. min 1 mg. 250 m. L. 1 hr. 60 min. Answer: 480 mcg. /min

Competency 9: mg. /min Lidocaine 2 g. in 500 m. L of D 5 W is infusing at 30 m. L/hr. Calculate the dosage in mg. /min. Answer as whole number. X mg. = 1000 mg. x 2 g. x 30 m. L. x 1 hr. Min. 1 g. 500 m. L. 1 hr. 60 min. Answer: 2 mg. /min

Competency 9 Practice “Medication” 400 mg in 250 m. L of D 5 W is infusing at 12 m. L/hr. Calculate the dosage in mcg. /min. (Whole #) “Medication” 4 g. in 500 m. L of D 5 W is infusing at 15 m. L/hr. Calculate the dosage in mg. /min. (Whole #) “Medication” 300 mg in 500 m. L of D 5 W is infusing at 33 m. L/hr. Calculate the dosage in mg. /hr. (Tenths)

X mcg. = 1000 mcg. x 400 mg. min. 1 mg. 250 m. L. Answer: 320 mcg. /min. X mg. = 1000 mg. x 4 g. x min. 1 g. 500 m. L. Answer: 2 mg. /min. X mg. = 300 mg. x 33 m. L. hr. 500 m. L. 1 hr. Answer: 19. 8 mg. /hr. x 12 m. L. x 1 hr. 60 min. 15 m. L. x 1 hr. 60 min.

Competency 10: Calculate dosages for continuous drip medications in terms of the weight/time measures of units/hour Insulin 200 units in 500 m. L NS is infusing at 17 m. L. per hour via an infusion pump. How many units per hour are infusing? (Answer in tenths) X units = 200 units x 17 m. L. hr. 500 m. L. 1 hr. X = 6. 8 units/hr.

Competency 10: Units/min. Heparin 25, 000 units in 250 m. L of D 5 W is infusing at 12 m. L. /hr. via an infusion pump. How many units per minute is the client receiving? X units = 25, 000 units x 12 m. L. x 1 hr. min. 250 m. L. 1 hr. 60 min. X = 20 units/min

Competency 10 practice Heparin 25, 000 units in 500 m. L. of D 5 W is to be infused at 25 m. L. /hr. How many units per min. will infuse? (whole #) Insulin 100 units in 250 m. L. of NS is to be infused at 15 m. L. per hour via Infusion pump. How many units per hour will infuse? (whole #)

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

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

Competency 11: Calculate infusion rates for IV medications from dosage ordered in weight time measures of mg. /min Pronestyl 4 g. in 500 m. L of D 5 W is to infuse at 3 mg. /min. At what rate (in m. L. /hr. ) will you set the pump? (Answer in Tenths) X m. L. = 500 m. L. x 1 g. x 3 mg. x 60 min. hr. 4 g. 1000 mg. 1 min. 1 hr. Answer: 22. 5 m. L. /hr.

Competency 11: Calculate infusion rates for IV medications from dosage ordered in weight time measures of mcg. /min Epinephrine 4 mg. in 250 m. L. D 5 W is to infuse at 6. 1 mcg. /min. At what rate will you set the IV pump (in m. L. /hr. )? Answer in tenths. X m. L. = 250 m. L. x 1 mg. x 6. 1 mcg. X 60 min. hr. 4 mg. 1000 mcg. 1 min. 1 hr. Answer: 22. 9 m. L. /hr.

Competency 11 Practice Lidocaine 2 gm in 500 m. L. D 5 W is to infuse at 3 mg. /min. At what rate will you setthe IV pump in m. L. /hr. ? (Answer as a Whole #) Heparin 20, 000 units in 250 m. L. of NS is to infuse at 1000 units per hr. At what rate will you set the IV pump in m. L. /hr? (Answer in tenths)

Answers X m. L. = 500 m. L. x 1 g. x 3 mg. x 60 min. hr. 2 g. 1000 mg. 1 min. 1 hr. Answer: 45 m. L. /hr. X m. L. = 250 m. L. x 1000 units hr. 20, 000 units 1 hr. Answer: 12. 5 m. L. /hr.

Competency 12: Calculate the dose in mcg/kg. /min. for continuous drip medications when the weight of the client and infusion rate are given A client is to receive 300 mg. of a medication in 250 m. L. of D 5 W at 14 m. L. /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 m. L. x 1 hr. x 1 Kg. /min 1 mg. 250 m. L. 1 hr. 60 min. 86. 7 kg. Answer: 3. 2 mcg. /kg. /min.

Competency 12: Calculate the dose in units /kg. /hr. for drip medications when the weight of the client and infusion rate are given Heparin 25, 000 units in 250 m. L. of D 5 W is is ordered for your client. The infusion rate is 10 m. L. /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 m. L x 1 x 2. 2 lb. kg. /hr. 250 m. L. 1 hr. 132 lb. 1 kg. Answer: 16. 7 units/kg. /hr.

Competency 12 Practice A client is to receive 450 mg. of a medication in 250 m. L. NS at 12 m. L. /hr. The client weighs 180 lb. Calculate the dose in mcg. /kg. /min. (Answer in tenths) Heparin 50, 000 units in 500 m. L. D 5 W is infusing at 45 m. L. /hr. The client weighs 81. 8 kg. Calculate the units/kg. /hr. your client is receiving. (Answer as whole #)

Answers X mcg. = 1000 mcg. x 450 mg. x 12 m. L. x 1 hr. x 2. 2 lb. x 1 kg. /min 1 mg. 250 m. L. 1 hr. 60 min. 1 kg. 180 lb. Answer: 4. 4 mcg. /kg. /min X units = 50, 000 units x 45 m. L. x 1 kg. /hr. 500 m. L. 1 hr. 81. 8 kg. Answer: 55 units/kg. /hr.

Competency 13: Calculate the infusion rate for continuous drip medications when given client’s weight and ordered dose in mcg. /kg. /hr. A client weighing 150 lb. has a drip of Dopamine 400 mg. in 250 m. L. D 5 W. The order is to infuse at 2 mcg. /kg. /min. At what rate will you infuse via pump (in m. L. /hr. )? (Answer tenths) X m. L. = 250 m. L. x 1 mg. x 2 mcg. x 60 min. x 1 kg. x 150 lb. Hr. 400 mg. 1000 mcg. kg. /min 1 hr. 2. 2 lb. 1 Answer: 5. 1 m. L. /hr.

Competency 13: Calculate the infusion rate for continuous drip medications when given client’s weight and ordered dose in mg. /kg. /hr. 700 mg. of a medication is infusing via pump in 250 m. L. of NS at the ordered 2. 5 mg. /kg. /hr. Your client weighs 153 pounds. Calculate the infusion rate in m. L. /hr. Answer as whole number. X m. L. = 250 m. L. x 2. 5 mg. x 1 kg. x 153 lb. hr. 700 mg. kg. /hr. 2. 2 lb. 1 Answer: 62 m. L. /hr.

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

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

Answers X m. L. = 250 m. L. x 1 g. x 2 mg. x 1 kg. x 123 lb. hr. 1 g. 1000 mg. kg. /hr. 2. 2 lb. 1 Answer: 28 m. L. /hr. X m. L. = 500 m. L. x 7 units x 76 kg. hr. 25, 000 units 1 kg. /hr. 1 Answer: 10. 6 m. L. /hr.

Competency 14: Determine if dosages are within the dosage range relative to the client’s weight 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

Is this dose safe? 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

Competency 14 Practice 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?

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

Competency 15: Determine daily fluid requirements relative to the client’s weight Requisite Knowledge: First 10 kg. = 100 m. L. /kg. /day Second 10 kg. = 50 m. L. /kg. /day Remaining kg. = 20 m. L. /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. 1 1000 m. L. + 160 m. L. = 1160 m. L. /day

100 m. L x 10 kg = 1000 m. L + 50 m. L x 3. 2 kg = 160 m. L _________________ 13. 2 kg 1160 m. L

Competency 15 Practice 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. 1000 + 500 + 100 = 1600 m. L. /day The infant weighs 5. 5 kg. 5. 5 x 100 = 550 m. L. /day

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