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
.
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.
