Isoflurane Usage

Re: Isoflurane Usage

denise laughlin — Wed, 24 Nov 2010 00:17:42 GMT

wow! Thanks for that! Do you know if you'd have to change the constant in tropical temperatures?

Re: Isoflurane Usage

sisterscope1 — Tue, 23 Nov 2010 20:33:06 GMT

There are several formulae you can use, the Dion formula is commonly used for costing the £/ml.

mls of volatile = (CxFxTxM) / (2412xD)

where

C = concentration %

F = fresh gas flow (litres/min)

T = time (mins)

M = molecular weight of volatile anaesthetic (see data sheet)

D = density of volatile anaesthetic (see data sheet)

2412 = a constant = molar volume of gas at room temperature.

Re: Isoflurane Usage

denise laughlin — Tue, 23 Nov 2010 13:59:59 GMT

I know, its very interesting! I am just trying to price up drugs and what each procedure costs and it got me thinking about the Iso..how do you work out what to charge for a procedure at your practice? Obviously its different as we are not charging but simply working out the costs of the drugs used in the procedure. Might contact Iso manufacturers and see if they can shed any light, surely they must have a calculation to be able to sell it..ie 250ml will last for 3 average bitch spays or what not... (dont take that as real estimate! Tis a long time since I was anywhere near a bitch spay!)

Re: Isoflurane Usage

Gillian Mostyn — Tue, 23 Nov 2010 13:46:07 GMT

As the isoflurane is a liquid in the bottle but is administered as a gas, I very much doubt you can... but am interested to know if anyone else knows better....