I need someone to explain this to me!!!!

Published

Specializes in LTC.

can someone explain to me why would i do 2 steps...

when in some other problems i only have to do the 2nd step?

why wouldn't i use 500ml/30min*60min/1hr

order:vancomycin 375mg iv over 30minutes four times a day

stock:1875mg vancomycin in 500ml of d5w.

what will you set the pump at?

okay the answer is:

(step 1)500ml/1875mg*375mg/1=187500/1875=100ml

(step 2) 100ml/30min*60min/1hr=6000/30=200ml/hr

Up Vote Up Vote ×
Specializes in acute care.

you wouldn't use your formula because you won't use the entire 500ml of vanco. in stock is 1875mg in 500ml of d5w. the order only calls for 375mg of vanco, so you must find out how many mls holds 375mg of vanco:

have::ordered

1875mg:500ml::375mg:x ml

1875x=(500)(375)

x= 187500/1875

x=100mls

understand?

now, you can find out how to set the pump:

mls:time ordered in min::mls:60 min

100ml:30min::x ml:60 min

30x=(100)(60)

x=6000/30

x=200ml

hope it helped, since i used ratio proportion to solve it

can someone explain to me why would i do 2 steps...

when in some other problems i only have to do the 2nd step?

why wouldn't i use 500ml/30min*60min/1hr

order:vancomycin 375mg iv over 30minutes four times a day

stock:1875mg vancomycin in 500ml of d5w.

what will you set the pump at?

okay the answer is:

(step 1)500ml/1875mg*375mg/1=187500/1875=100ml

(step 2) 100ml/30min*60min/1hr=6000/30=200ml/hr

Up Vote Up Vote ×
Specializes in LTC.

OH MY GOD!!!!!

THANK YOU SO MUCH FOR TAKING TIME TO EXPLAIN IT TO ME!...

:loveya:I DO UNDERSTAND!

Up Vote Up Vote ×
Specializes in LTC.
you wouldn't use your formula because you won't use the entire 500ml of vanco. in stock is 1875mg in 500ml of d5w. the order only calls for 375mg of vanco, so you must find out how many mls holds 375mg of vanco:

have::ordered

1875mg:500ml::375mg:x ml

1875x=(500)(375)

x= 187500/1875

x=100mls

understand?

now, you can find out how to set the pump:

mls:time ordered in min::mls:60 min

100ml:30min::x ml:60 min

30x=(100)(60)

x=6000/30

x=200ml

hope it helped, since i used ratio proportion to solve it

so if the order is less than what i have in stock then thats when i need to do 2 steps?

Up Vote Up Vote ×
Specializes in LTC.
oh my god!!!!!

thank you so much for taking time to explain it to me!...

:loveya:i do understand!

here's another one i'm confused on!

order:ancef 0.6 giv in 50ml d5ns over 20min

stock:ancef 1gram in 100ml

answer:100/1g*0.6g/1=60/1= 60ml...

60ml/20min*60min/1hr=3600/20= 180ml/hr (final answer)

so because the order is less than what i have in stock

i would need to do 2 steps on this one too?

Up Vote Up Vote ×
Specializes in acute care.

You are quite welcome. This order was not equal to what you have in stock so, in this particular case, you would not need the entire bottle.

ETA: I want you to be able to UNDERSTAND why you are solving the problem the way you are solving it, and focus LESS on trying to guess whether it is a one or two step problem.

Up Vote Up Vote ×
Specializes in acute care.

did you try to solve this problem on your own or was this in the book?

btw, i got the same answer

answer:100/1g*0.6g/1=60/1= 60ml...

60ml/20min*60min/1hr=3600/20= 180ml/hr (final answer)

so because the order is less than what i have in stock

i would need to do 2 steps on this one too?

Up Vote Up Vote ×
+ Join the Discussion