Operator's Manual

BeneVision N1 Patient Monitor Operator’s Manual 15 - 11
◆ Select Room Air when air predominates in the ventilation gas mixture.
◆ Select N2O when N
2
O predominates in the ventilation gas mixture.
◆ Select He when He predominates in the ventilation gas mixture.
■ O2 Compensation
◆
Select Off when the amount of O
2
is less than 30%.
◆ Select an appropriate setting according to the amount of O
2
in the ventilation gas mixture.
■ AG Compensation: enters the concentration of anesthetic gas present in the ventilation gas mixture. This
could compensate for the effect of AG on the readings.
15.11 Choosing a Time Interval for Peak-Picking
For microstream and mainstream CO
2
modules, you can select a time interval for picking the highest CO
2
as the
EtCO
2
and the lowest as the FiCO
2
.
To set the time interval, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the CO2 menu.
2. Select the
Setup tab.
3. Set
Maximum Hold.
4. Toggle between
Single Breath, 10 s, 20 s and 30 s if microstream CO
2
module is configured; toggle
between
Single Breath, 10 s and 20 s if mainstream CO
2
module is configured.
◆ Single Breath: EtCO
2
and FiCO
2
are calculated for every breath.
◆ 10 s, 20 s, or 30 s: EtCO
2
and FiCO
2
are calculated using 10, 20 or 30 seconds of data.
15.12 Changing Barometric Pressure
Both sidestream and microstream CO
2
modules have the function of automatic barometric pressure
compensation (the system automatically measures the barometric pressure to which the patient monitor is
exposed). However, the mainstream CO
2
module does not have such function. For the mainstream CO
2
module,
the default barometric pressure is 760 mmHg. You must modify the barometric pressure based on the actual
situation. To change the barometric pressure for the mainstream CO
2
module, follow this procedure:
1. Select the
Main Menu quick key → from the System column select Maintenance → input the required
password
→ select .
2. Select
Other tab.
3. Select
Barometric Pressure and then enter the value of barometric pressure to which the patient monitor
is exposed to.
WARNING
• Be sure to set the barometric pressure properly before using the mainstream CO
2
module. Improper
settings will result in erroneous CO
2
reading.
15.13 Performing the Leakage Test
When measuring CO
2
using the internal CO
2
module or the sidestream CO
2
module. The leakage test is required
every time before the CO
2
measurement. To perform the CO
2
leakage test, follow this procedure:
1. Connect the measuring accessories as per section
15.5.1Preparing to Measure CO
2
Using Sidestream CO
2
Module.
2. Wait until the startup finishes. Completely block the gas inlet on the sidestream CO2 module or on the N1.
Then the alarm message “CO2 Airway Occluded” will appear on the screen.
3. Block the gas inlet for another one minute.