S/5 Airway modules
Document No. 800 1005-1
7
2.1.3
Agent identification
The anesthetic agent identification bench identifies Halothane, Enflurane, Isoflurane, Desflurane
and Sevoflurane.
The bench measures the spectrum of the gas between 3.24 µm and 3.39 µm. Because the
spectrum of each of the anaesthetic agents is different it is possible to identify them.
The bench consists of an infrared source, a measuring chamber, a rotating filter and a detector. The
peak wavelength of the narrow bandpass filter changes when the angle between the light path and
the filter is changed. When the filter rotates the required spectrum is scanned through. The agent or
a mixture of agents is identified by comparing the measured spectrum with stored reference
spectra.
Anesthetic Agent Gas Absorption Spectra
0
50
100
150
200
250
300
350
400
450
500
3246
3306
3386
Wavelength [nm]
Halothane 0
Enflurane 0
Isoflurane 0
Sevoflurane 0
Desflurane 0
Freon 0
Figure 3
Anaesthetic Agents gas absorption spectra
Summary of Contents for S/5 B-GAS
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