D50 TO D25 OR D10
Posted 18 July 2008 - 05:09 AM
My protocols have 3 concentrations of dextrose for adults (d50), ped's(d25) and neonates (d10). My drug sheet states to make d25 just eject half the d50 ampule and refill it with NS (pretty obvious one). I want to be able to do d10 on the fly as well so just to check my math: Eject 80% of the d50 ampule and refill it which makes 50cc of 10% solution correct?
Thanks for your time =)
Posted 18 July 2008 - 12:08 PM
Posted 18 July 2008 - 01:36 PM
Easy med math here..
Start with the doctors order (or protocol) which is asking for d10 (7.5g) divide by how much drug you have (25 g) and multiply by how many mL's it comes in (50mL) and that will give you how many mL you need to infuse 7.5g of dextrose which comes to 15mL.
Want to dilute it? 20mL syringe, draw up 15mL of D50 and 5mL of NS and that's probably the most fluid I'd give a neonate, if that.
This method works for most meds... Demerol (35mg) and is supplied by 50mg/2mL.
35mg / 50mg * 2mL = 1.4mL of demerol you need to push.
This is how I set this up on paper... start with mg (what is ordered/needed to give, can be mg, g, or mcg, depends on the drug) divided by mg (how many mg, g, mcg the drug is supplied in, remember keep your titles the same mg/mg, or g/g, etc) then multiply by mL it's supplied in and it will lead you to x (the answer in mL needed to give). ALWAYS START WITH WHAT IS ORDERED (or what dose is protocol) in the upper left hand corner.
Hope it makes sense... I tried to make an equation but when I post it; it doesn't come out correctly.
Posted 18 July 2008 - 02:37 PM
The drug is for the neonate patient, so we are talking about a very small amount of the drug.
I also am assuming that you protocol wants you to give the neonate 1-2cc's of D10 per Kg. So again, we are talking about a low volume bolus.
AZCEP's methods work fine, but I am just giving you my method in case your company does not buy 250ml bags.
Pull 4cc of D50 into a 20cc syringe. Then pull 16cc's of saline to dilute. This puts 2 grams in 20 cc's, and gives you a 10% solution. This amount should be just slightly more than adequate to administer to a neonate.
Posted 18 July 2008 - 05:26 PM
The protocol actually has:
1cc/kg d50 for > 2y/o
2cc/kg d25 for < 2 y/o
3cc/kg d10 for neonates
Isn't that basically the same amount of sugar just diluted 2 as 3 times respectively? Could I then just draw up some d50 and then either double or triple the volume with NS and have my correct concentration?
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