Mindray Accutorr 7, Operator'S Manual

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11 - 6 Accutorr 7 Operator’s Manual
11.7.6 Setting Humidity Compensation
The CO
2
module is configured to compensate CO
2
readings for either Body Temperature
and Pressure, Saturated Gas (BTPS), to account for humidity in the patient’s breath, or
Ambient Temperature and Pressure, Dry Gas (ATPD).
■
ATPD:
■
BTPS:
Where, P
CO2
= partial pressure, vol% = CO
2
concentration, P
amb
= ambient pressure, and
unit is mmHg.
To set the humidity compensation, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the [ CO2 Setup ] menu.
2. Set [ BTPS Compensation ] to [ On ] or [ Off ].
11.7.7 Setting Gas Compensation
The presence of interfering gas affects the CO
2
measurement. To get the best possible
measurement result, it is important to set the gas compensation. The configured
concentration of the interfering gas should be in accordance with its actual proportion.
WARNING
•
Make sure to use the appropriate compensations. Inappropriate
compensations may cause inaccurate measurement values and result in
misdiagnosis.
To set the gas compensation, follow this procedure:
1. Select the CO
2
numeric area or waveform area to enter the [ CO2 Setup ] menu.
2. Set the O
2
, N
2
O and AA compensation according to the actual amount of the
respective gas in the ventilation gas mixture.
11.7.8 Automatic Barometric Pressure
The CO
2
module has the function of automatic barometric pressure compensation.
11.7.9 Calibrating the CO
2
Module
A calibration should be performed once a year or when the readings go far beyond the
specified measurement range. For details on calibrating the CO
2
module, refer to
16.7 Calibrating CO
2
.
P
co2
mmHg
 
CO
2
vol%
 
P
amb
100
 
=
P
co2
mmHg
 
CO
2
vol%
 
P
amb
47 –
 
100
 
=