154
The total pressure of the gas mixture is measured by a cuvette pressure sensor in the ISA gas
analyzer. For conversion to other units, the actual atmospheric pressure sent from the ISA
sidestream analyzer may be used, e.g.
CO
2
in mmHg = (CO
2
concentration) x (atm. pressure value in kPa from ISA) x (750 / 100).
Example: 5.0 vol% CO
2
@ 101.3 kPa 0.05 x 101.3 x 750 / 100 = 38 mmHg
9.11.3. Mainstream gas monitoring module
Table 9-19
Airway adapter, disposable.
Working principle of gas
module
The gas module is a mainstream gas monitoring module, connecting to
patient to monitor gas concentration of breath.
The gas module can be used for adults, children and infants.
The gas module uses infrared technology, which determines gas
concentrations by measuring different wavelengths according to
different absorption of gases to different ray.
Table 9-20 Basic Configuration
Extremely compact infrared mainstream multi-gas module.
Available in various parameter configurations.
IRMA CO
2
/ AX+:
38×37×34mm(1.49″×1.45″× 1.34″)
IRMA CO
2
: 0~40℃, 32~104℉
IRMA AX+: 10~40℃, 50~104℉
Storage and transportation
temperature
IRMA CO
2
: -40~75℃, -40~167℉
IRMA AX+: -20~75℃, -4~167℉
<40hPa H
2
O(non-condensing)(95%RH at 30 degree celsius)
Storage and transportation
humidity