Nurses Medications
Updated: Mar 4, 2020 Published Apr 28, 2019
nurs1ng
149 Posts
Putting 5 cc of 1% propofol into a 10 ml syringe and mixing it with 5 cc 1% lidocaine... what would that give me X mg/ml of propofol? Just wanna make sure I have my calculations right. Any help would be appreciated
Wuzzie
5,209 Posts
All you need to figure out is how many milligrams/ml of Propofol are in a 1% solution. It matters not how you dilute it. The dose won’t change only the concentration will.
1 hour ago, Wuzzie said:All you need to figure out is how many milligrams/ml of Propofol are in a 1% solution. It matters not how you dilute it. The dose won’t change only the concentration will.
So that would give me 2 mg/ml? I know that 1% is 10 mg/ml.. what's confusing me is if there would be a difference with taking 1 cc of 1% vs 5 cc of 1% but from your post, seems like there is no difference as to how much you take out since 1% will be constant from the get go.
Show me how you got 2mg/ml so I can see where you’re getting hung up.
1 hour ago, Wuzzie said:Show me how you got 2mg/ml so I can see where you’re getting hung up.
Well initially I got 5 mg/ml (5 cc of 1% prop in 5 cc lido)...but may have misinterpreted your post and so my other answer concluded to 2 mg/ml (1 cc 1% prop divided by 5 cc lido = 2 mg/ml)
chare
4,307 Posts
One of our members, a retired pharmacist, has written a textbook (Pharmacy Calculations for Pharmacy Technicians) that he has made available. Although written for pharmacy technicians most of the material is applicable to nursing as well. If you are not familiar with dimensional analysis you might find it helpful.
MunoRN, RN
8,058 Posts
You might be overthinking this. You know you've got 5ml of 10mg/ml Propofol, and you know your final volume. So how many mgs of Propofol are in that final volume?
murseman24, MSN, CRNA
316 Posts
It looks like you have 50 mg in 10 mL = 5mg/mL of propofol in the mixture.