Mindray Accutorr 7 - Measurement Limitations; CO Display; Automatic CO Module Zeroing

11 - 2 Accutorr 7 Operator’s Manual
11.3 Measurement Limitations
The following factors may influence the measurement accuracy:
■ Leaks or internal venting of sampled gas
■ Mechanical shock
■ Cyclic pressure up to 10 kPa (100 cmH
2
O)
■ Other sources of interference, if any
Measurement accuracy may be affected by the breath rate and inspiration/expiration
ratio (I: E ratio) as follows:
■ EtCO
2
value is within specification for breath rate ≤ 60 bpm and I/E ratio ≤ 1:1;
■ EtCO
2
value 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.
11.4 CO
2
Display
The CO
2
parameter and waveform areas provide FiCO
2
measurement, EtCO
2
measurement, awRR measurement, and a CO
2
waveform.
1. End tidal CO
2
(EtCO
2
)
2. Fraction of inspired CO
2
(FiCO
2
)
3. Airway respiration rate (RR)
4. CO
2
waveform
5. Scale
11.5 Automatic CO
2
Module Zeroing
The CO
2
module performs zero calibration automatically when needed.
NOTE
• The CO
2
module temporally stops measuring during zeroing.
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4
5