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Capnography (CO
2
)
Welch Allyn 146 Propaq Encore Reference Guide
Capnography (CO
2
)
General CO
2
Specifications
Characteristic Specification
CO
2
Display
Screen Display CO
2
waveform and ETCO
2
and INCO
2
(when in alarm) numerics
Numeric Display Ranges ETCO
2
0-99 mmHg, 0-13.2 kPa, 0-23.1%
INCO
2
8
a
-25 mmHg, 1.1
a
-5 kPa, 1.1
a
-5%
Waveform Scale (Maximum) 0-100 mmHg, 0-14 kPa, 0-14%
Units mmHg, kPa,%; user-selectable
Sweep Speed 3.13, 6.25, 12.5 mm/sec; user-selectable
Response Modes Fast 15 sec sampling time period
Normal 30 sec sampling time period
Slow 45 sec sampling time period
Gas Compensation OFF CO
2
value = calculated CO
2
value;
O
2
> 50%, No N
2
OCO
2
value = calculated CO
2
value x 1.03;
N
2
O > 50% CO
2
value = calculated CO
2
value x 0.952
Alarm Limit Ranges ETCO
2
0-99 mmHg, 0-13.2 kPa, 0-13.2%
INCO
2
2-25 mmHg, 0.2-5 kPa, % (no lower limit)
Resolution 1 mmHg
Accuracy Mainstream
b
0-30 mmHg, ±3 mmHg
31-99 mmHg, ± 10% of value
Sidestream
c
0-30 mmHg, ±3 mmHg
31-99 mmHg, ± 10% of value
Altitude Error ±0.4%/1,000 ft (304.8 m)
Breath Rate Display
Screen Display Numeric
Breath rate (BR) source When CO
2
is active, CO
2
is the BR source.
Otherwise, RESP from ECG is the RR source.
Units Breaths/Minute
Range Adult/Ped 0 (apnea), 2 to 150 breaths/min
Neonate 0 (apnea), 3 to 150 breaths/min
Resolution ±1 breaths/min
Accuracy ±1 breaths/min or ±5%, whichever is greater
d
Alarm Limits Range Adult/Ped 2 to 150 breaths/min
Neonate 3 to 150 breaths/min
CO
2
Perormance
Specification Per ISO 9918:1993 (E) / EN 864:1996
Apnea Alarms and Tickets
Apnea Ticket Set to auto print after apnea event and after 1 minute continued apnea
Apnea Alarm Accuracy ± 2 sec
Apnea delay setting Adult/Ped = 6, 10, 15, 20, 25, 30 seconds
Neonate = 6, 10, 15, 20 seconds