H E Y E R P a s i t h e c
96 / 106 HEYER Pasithec, Operator’s manual Rev. 0.2 Draft - 12/09
10.9 O
2
Monitoring Specification
Response time: Not more than 15 seconds
Type of O
2
sensor: Chemical fuel cell
Useful life: 12 months (normal operating)
Operational principle: O
2
monitoring modules can monitor and display oxygen concentration
of the patient circuit and contain one oxygen sensor. The O
2
sensor
can detect the proportionate voltage on its surface, generated with
partial pressure of O
2
.
The O
2
sensor is a chemical fuel cell, and its metal electrode can be
oxidated when oxygen diffuses into it. The current generated from
oxidation proportion O
2
partial pressure on the surface of an electrode.
The electrode will be used up gradually during the oxidation process.
The voltage of the sensor will be affected by the temperature of the
gas mixture monitored. Thermistor on the shell of the sensor will auto-
compensate temperature difference inside the sensor.
Signal processing and circuit analyzing can be used in the O
2
monitoring modules. So the signal of O
2
sensor could be transformed
to O
2
concentration. The concentration is displayed on the screen and
should be comparable with the alarm limit value saved. If the
concentration exceeds the limits, the alarm should be sound.
The effect of disturbance gas (CO
2
, N
2
O, anesthetic gas) on the
concentration of the O
2
sensor is less than 0.5%VOL.
10.10 IRMA Probe Specification
10.10.1 Intended Use
The IRMA main stream multi-gas probe is intended to be connected to other medical devices for
display of real time and derived monitoring data of CO
2
, N
2
O, and the anesthetic agents Halothane,
Enflurane, Isoflurane, Sevoflurane and Desflurane.
It is intended to be connected to a patient breathing circuit for monitoring of inspired/expired gases
during anesthesia, recovery and respiratory care. It may be used in the operating suite, intensive care
unit, patient room and emergency medicine settings for adult, pediatric and infant patients.
Model of Sensor
：
IRMA CO
2
or IRMA AX+
Interface
：
RS232
，
9600 bps
Useful time
：
Replace it every two weeks.
Accessory
：
Airway adapter, adult/infant
Never sterilize or immerse the IRMA airway adapters in liquid.
They can be cleaned using a cloth moistened with ethanol or isopropyl
alcohol.
Principle of IRMA
：
It is intended to be connected to a patient breathing circuit for
monitoring of inspired/expired gases during anesthesia, recovery and
respiratory care. It may be used in the operating suite, intensive care
unit, patient room and emergency medicine settings for adult, pediatric,
and infant patients.
The IRMA probe adopts infrared measurement technology to measure
the concentration of different gases in the breathing gas mixture, which
is based on the fact that the different gas components absorb infrared
light at specific wavelengths.
Integrated with RS-232 digital interface, it supplies the universal serial
interface communication protocol and is easy to connect.
To Next Page
Loading...
