Question

18. Calculate the total dose in cubic centimeters of a drug, to be administered IM to a patient weighing 47 pounds. The concentration of the drug is 5mg/ml and the dosage rate is 5mg per kg._____________

19. Calculate the total dose in cubic centimeters of a drug, to be administered IV to a patient weighing 88 pounds. The concentration of the drug is 20mg/ml and the dosage rate is 11mg per kg._____________

Answer 1

18. The weight of the patient when converted into kg is lbs/2.2

= 47/2.2

=21.3kg is the weight of the patient

available concentration of the drug is 5mg/ml and the dosage rate is 5mg/kg

the total drug given to the patient as per the weight is 21.3X 5

= 106.5 mg

As we know 1 cubic centimeter = 1 ml, so we need to convert the dose of the drug into ml

The formula used here is Required dose/Dose in hand X ml

= 106.5/5X1

= 21.3 ml or cubic centimeter to be administered IM

19) The weight of the patient in kg is = 88/2.2

= 40 kg

The total dosage of medication to be administered is 11mg/kg

= 11X 40

= 440 mg of drug to be given IV

To convert the total drug into Cubic centimeters we need to first calculate the volume of drug given IV

Foe that the following formula is used

    Required dose/Dose in hand X ml

440mg/20X1

22 ml or cubic centimeter of drug is given IV