Mindray SynoVent E5, Operator'S Manual

Page: 97 / 196

7-5
7.3.4 Set Humidity Compensation
The CO2 module is configured to compensate CO2 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).
1. ATPD:
100 / %) ( ) (
2 2
amb co
P vol CO mmHg P
 
2. BTPS:
100 / ) 47 ( %) ( ) (
2 2
  
amb CO
P vol CO mmHg P
where,
2
CO
P
= partial pressure,
%
vol
= CO2 concentration,
amb
P
= ambient pressure, and
unit is mmHg.
For CO2 module, humidity compensation is switched on or off based on the actual situations.
1. Push the Menu key. Select [ System ] and then [ CO2 ].
2. Set [ Humidity Comp ] to [ ON ] or [ OFF ] in either BTPS or ATPD.
7.3.5 Restore Defaults
Push the Menu key. Select [ System ] and then [ CO2 ]. Select [ Defaults ] to restore all menu
options to the factory default configurations.
7.3.6 Set CO2 Waveform
Refer to
5.1.1 Waveforms
to set CO2 waveform..
7.4 Measurement Limitations
Measurement accuracy may be compromised due to:
 Leakage or internal leakage of the sample gas
 Mechanical shock
 Cyclic pressure which is greater than 10 kPa (100 cmH2O)
 Other interference source (if available)
Measurement accuracy may be affected by the breath rate and I/E ratio as follow:
etCO2 is within specification for breath rate
≤ 60 bpm and I/E ratio ≤ 1:1;
etCO2 is within specification for breath rate
≤
30 bpm and I/E ratio
≤
2:1.
Measurement accuracy is unspecified for breath rate larger than 60 bpm.