how to solve this?>..<


this is totally easy question that im still cannot solve. i just turn into sem two and just study pharmacology math. but im weak still DX

is this correct?

1.the recommended dose of cefazolin sodium foe a pediatric client is 25-50 MG/KG/DAY. how many Mls may be given daily to a 35 pounds child?

i answered:

> 35pound/2.2pound= 16pound.

>16pundx16KG= 400Ml.

any correction?

JustBeachyNurse, LPN

1 Article; 13,952 Posts

Specializes in Complex pedi to LTC/SA & now a manager. Has 13 years experience.

this i don't understand: "

i answered:

> 35pound/2.2pound= 16pound.

>16pundx16kg= 400ml.

there is no way to multiply 16 pounds x 16 kilograms to have a result of milliliters. :D

first convert to kg. 35lbs/2.2lbs/kg = 15.9 kg (we had to round to one decimal place for pedi doses, if your program permits you to round up then use 16 kg). then multiply kg x dose (mg/kg/day). kg will "cancel out" so the result will be mg/day

15.9kg (or 16 kg) x 50mg/kg/day = ___mg/day max

15.9kg (or 16 kg) x 25 mg/kg/day = ____5 mg/day min

(i'm sure you are capable of multiplying 16 x 50 and/or 16 x 25)

cannot answer in milliliters as you did not give that information (vial contains x mg/ y ml). only dose range of 25-50 mg/kg/day so can only answer the minimum & maximum amount of mg per day for a 35lb child. are you sure the question isn't what is the acceptable dose range for a child of this size?

nurseprnRN, BSN, RN

2 Articles; 5,114 Posts

you can't get an answer in milliliters if the only data you have to work in are measures of weight.

you are told how many mg of the drug is safe per each kilogram of a child's weight, and then being asked how much is an acceptable dose range for a child of a given weight. you are also asked to figure out how many kg the child weighs, when his weight is given in pounds. you need to know (or know to go look up) that 2.2 pounds = 1 kg.

for example:

it's safe to give a child one to three jellybeans every day for every kg the child weighs. the child weighs 44 pounds. how many jelly beans can he have every day?

how many kg is 44 pounds? answer: since one kg = 2.2 pounds, 20 kg = 44 pounds.

one to three jelly beans daily is safe for each kg the child weighs, so this child can have 20 - 60 jelly beans every day.

well, i wouldn't really give a little kid 20-60 jelly beans (even in divided doses):eek:, but you get the idea. you are told how much drug is ok per kg, figure out the number of kg, and multiply by the acceptable dose; this gives you the acceptable total range per day. think about what they're asking you.


22 Posts

TYVM for your explanation! :D I really appreciated it :))))