Published Jan 29, 2006
jennyga
50 Posts
OK I am really confused!
childs lbs.-9.24
order-ampicillian 420 mg. (30mg/ml)
Usual Adult dose- 1-12 grams
9.24*1000
--------- = 61.6
150
SAFE RANGE= 61.6-70.53mg
9.24*12000 and the order is 420mg!!??!!
------------=70.53 This is a real pt.!! Am I not
150 calculating right?
Leda
157 Posts
Clark's Rule: Wt of pt in lbs/150 lb X usual adult dose = "safe" pedi dose
Your calculation of 61.6 mg is correct, using the lower end of the adult dose 1 gram (1,000 mg)
However you listed the upper safe adult dose as 12 grams (12,000 mg). Using this figure the upper limit pedi dose would be 739.2 mg:
9.24 lb/150 lb X 12,000 mg = 739.2 mg
So your pedi patient's ordered dose of 420 mg falls nicely between 61.6 mg & 739.2 mg, indicating that according to Clark's Rule the ordered dose is safe to administer.
Thank you so much!! See you have to look at the little things!! (multiplication!)