Fluke Biomedical VT Mobile - Manual (Page 94)

VT MOBILE
Operators Manual
A-28
edg75s.bmp
Figure A-35. Advanced Gas Settings Dialog Box
Note
If you do not know the viscosity or molecular weight of the gas you are
using, click the Gas Calculator button.
Gas Calculator
The gas calculator (Figure A-36) allows you to calculate the viscosity and molecular
weight of a gas mixture. One gas serves as a balance gas. This means that the calculator
automatically adjusts the percentage of this gas to insure that the total percentage of gases
totals 100%. To change which gas is the balance gas, click the radio button to the left of
the gas’s name. Use any of the five standard gases as a balance gas.
You can adjust the percentage each gas makes up of your mixture by changing the values
in the two columns to the right of the gas’s name. If you have a gas in your mixture that
is not one of the standard five, you may use one of the user gases. The user gases have
four predefined gas options (halothane, isoflurane, enflurane, and desflurane) and a user-
defined option. Select your gas from the list of predefined gases or if the gas you are
using is not one of these predefined gases, select the user-defined option. Enter the
molecular weight, viscosity coefficient, and viscosity intercept into the boxes given.
Clicking the Air button or the Respiration button sets the calculator to the defaults for air
or respiration.