Calculations

Re: Calculations

James Colver Cert. Ed, RVN — Fri, 18 Jul 2014 17:38:37 GMT

Step 1) Dose rate (mg/kg) x weight = total dose (mg)

Step 2) total dose (mg) divided by concentration of drug (mg/ml) = amount to give (ml)

It's as easy as that. If you are faced with a % solution simply multiply by 10 to convert to mg/ml (e.g. Baytril 2.5% is 25mg/ml)

Re: Calculations

wilkoannie — Sat, 12 Jul 2014 10:53:02 GMT

Well that's how I do it Charlie but was told not to use the 2mls which threw me. I did 2x4 = 8 / 50 x 2 which give me 0.32 But was told it was 0.16 so I assumed I was doing it wrong. Thank you guys xx

Re: Calculations

Charley83 — Sat, 12 Jul 2014 08:42:34 GMT

I was always told

What you want = 8mgs (4kgs x 2mgs/kgs)

divided by what you've got 8mgs/50 = 0.16mls

times what its in = 0.16mls x 2 = 0.32mls

This way always stuck in my head at human nursing uni - easy to remember.

Re: Calculations

Nick Shackleton — Sat, 12 Jul 2014 00:26:17 GMT

So it's 25mg/ml not 50mg/ml. 2x4=8mg 8\25=0.32mls not 0.16mls