francaise123 515 Views

Joined: Jan 23, '09; Posts: 1 (0% Liked)

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hello everyone,

it's my first time in this forum, which i must say is very interactive.
i'm a first year student nurse in france having difficulties with dosage calculations. my calculations book confuses me and we don't have a dosage calculations class.
so if anyone could help me solve these problems i'd be grateful.

exercise 1

order: 120mg of gentamicin im
supply: ampoules of 10mg, 40mg, 80mg of 2ml each
choose the ampoules to be used and the volume in ml to be injected

volume to inject choosing the more concentrated solution: 120mg x 2ml /80mg= 3ml,
now i will be short 1ml since there is 2ml by ampoule

exercise 2

order: zofran 6mg in 20 minutes with 100ml of 0.9%nacl
supply: 8mg/4ml
what's the volume to be injected?
calculate the flow rate in gouttes/min and in ml/h

volume to inject: 6mg x 4ml/8mg = 3ml
flow rate in ml/h= total ml/total hours, here the total hours is 1/3(20minutes), so 100ml/1/3h = 300ml/h
flow rate in gttes/min= v ml/ t min x c (gttes/ml), here the gttes/ml will be 20, so 300ml/60min x 20gttes/ml = 100gttes/min

am i doing it right

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