need help with a math problem

cslxagRN · May 28, 2009

500mg * 1gm / 1000mg * 4ml/2gm = 1 ml

Daytonite, BSN, RN · May 28, 2009

a vial contains 2 gm of powder. after being reconstituted with 4cc saline, how many mls are needed to administer a 500mg dose?

dose desired:

500 mg

dose on hand:

2 grams

conversion factor:

1 gram = 1000 mg

also, be aware that 1 cc = 1 ml

dose desired divided by dose on hand multiplied by any amount the dose on hand comes in gives you the quantity you will give.

500 mg

(dose desired)

/2 grams

(dose on hand)

x 4 ml

(amount the dose on hand comes in)

/1 x 1 gram/1000 mg

(conversion factor - to convert grams to mg)

=

1 ml

(amount you will give)

you will find weblinks to tutorials on post #2 of this sticky thread: https://allnurses.com/general-nursing-student/nursing-math-thread-264395.html - the nursing math thread

mRpeNa · May 28, 2009

a vial contains 2 gm of powder. after being reconstituted with 4cc saline, how many mls are needed to administer a 500mg dose?
dose desired:
500 mg
dose on hand:
2 grams
conversion factor:
1 gram = 1000 mg
also, be aware that 1 cc = 1 ml
dose desired divided by dose on hand multiplied by any amount the dose on hand comes in gives you the quantity you will give.

500 mg
(dose desired)
/2 grams
(dose on hand)
x 4 ml
(amount the dose on hand comes in)
/1 x 1 gram/1000 mg
(conversion factor - to convert grams to mg)
=
1 ml
(amount you will give)
you will find weblinks to tutorials on post #2 of this sticky thread: https://allnurses.com/general-nursing-student/nursing-math-thread-264395.html - the nursing math thread

thank you! i dont know why i have am having a hard time with this kind of math