Comen N10 - Page 257

Product Specifications
II-11
The following methods are used
to calculate end-tidal (ET) values
The highest concentration of
CO
2
during one breathing cycle
with a weight function applied
to favor values closer to the end
of the cycle. EtCO
2
within
specification for all respiratory
rates up to 150 bpm.
ET will typically decrease below
nominal value when respiration
rate exceeds 80 bpm The
maximum decrease is described
by the formula
ET=80*ETnom/RR.
EtCO
2
will be within
specification for all respiration
rates up to 150 bpm
The following methods are used to calculate end-
tidal (ET) values:
The highest concentration of CO
2
during one
breathing cycle with a weight function applied to
favor values closer to the end of the cycle. EtCO
2
within specification for all respiratory rates up to
150 bpm.
ET will typically decrease below nominal values
(ETnom) when respiratory rate (RR) exceeds the
RR threshold (RRth) according to the following
formulas:
ET=ETnom*(125/RR) for RRth>125
EtCO
2
alarm limit setting
Upper limit: (lower limit + 2mmHg) ~ 190mmHg;
Lower limit: 0mmHg ~ (upper limit – 2mmHg).
Step: 1mmHg
FiCO
2
alarm limit setting
Upper limit: 0mmHg - 99mmHg; lower limit: N/A
Step: 1mmHg
Breath detection
Adaptive threshold, minimum 1% change in CO2 concentration
awRR measurement
range
0 - 150 breaths/min. measured
at I/E ratio 1:1
Masimo ISA sidestream:0 - 100 breaths/min.
measured at I/E ratio 1:1
Masimo Capno sidestream:0 - 150 breaths/min.
measured at I/E ratio 1:1
awRR measurement
accuracy:
±1rpm
±1rpm
aRR alarm limit setting
Upper limit: (lower limit + 2rpm) ~ 150rpm;
Lower limit: 0 rpm ~ (upper limit - 2rpm).
Step: 0rpm - 20rpm: 1rpm; 21rpm - 150rpm: 5rpm
No Breaths time range
and step
For Adu: 15s, 20s, 25s, 30s, 35s, 40s, 45s, 50s, 55s, 1min;
For Neo./Ped.: 15s, 20s, 25s, 30s, 35s, 40s
Step
±5s
Power supply voltage
4.5 - 5.5Vd.c. power supply
Operating environment
0 - 40°C (32 - 104°F); 525 -
1200hPa
< 40 hPa H
2
O (non-condensing)
(95 %RH at 30 °C);
0 - 50°C (32 - 122°F); 525 - 1200hPa
< 40 hPa H
2
O (non-condensing) (95 %RH at 30 °C);
Comen/Respironics EtCO
2
(Mainstream)
Comen/Respironics EtCO
2
(Sidestream)
CO
2
Measurement Range
0 - 150 mmHg /0% - 19.7%/
0 - 20.0kPa (at 760mmHg)
Comen: 0 - 150 mmHg:
0% - 19.7%: 0 - 20.0kPa (at 760mmHg)