Teledyne AX300-I - Medical application oxygen analyzer - Manual (Page 24)

Operating Instructions AX300-I
Teledyne Analytical Instruments
16
troubleshooting section of this manual may provide additional assistance in lo-
cating the problem.
2.3.5 Anesthetic Gases
2.3.5.1 Gases That MAY INDUCE Reading Error
When using the R17MED sensor in the presence of anesthetic gases, the
oxygen reading may fall (see Table below). The magnitude of this error will de-
pend upon the level of oxygen and the duration of exposure.
The anesthetic agents listed in the following table (Halothane, Enflurane,
Isoflurane, Sevoflurane, and Desflurane) were vaporized into a stream of 30%
oxygen / 70% nitrous oxide, and the resulting drops in oxygen level after an ex-
posure of approximately two hours were noted.
Exposures in excess of two hours may produce slightly greater errors. The er-
rors listed are typical for all oxygen sensors such as the R17MED. Exposing the
sensor to air or gases that do not contain anesthetic agents for a period of time
equal to or greater than the exposure interval will eliminate the reading error in
most cases.
Table 2-1: Oxygen Reading Error in a Mixture of Anesthetic Gas
Gas or Vapor Level
(Balance: Mixture of 30% O2 / 70% N2O, except where noted)
Gas or Vapor Test Level Oxygen Reading
Error
Helium 50%, balance O2 0%
Nitrous Oxide 80%, balance O2 0%
Carbon Dioxide 10%, balance O2 0%
Halothane 4% < 1.5% O2 *
Enflurane 5% < 1.5% O2 *
Isoflurane 5% < 1.5% O2 *
Sevoflurane 5% < 1.5% O2 *
Desflurane 15% < 1.5% O2 *
* Errors are approximate and may vary based on exposure times and concentra-
tions.
These performances meet or exceed the requirements of ISO 7767: 1997 (E).