Compact Airway modules
Document No. 800 1009-1
3
1.2.4
Respiration Rate (RR)
Measurement range
4...60 breaths/min
Detection criteria
1 % variation in CO
2
1.2.5
Anesthetic Agents (AA)
Measuring range
Hal, Enf, Iso
0 to 6 vol%
Sev
0 to 8 vol%
Des
0 to 20 vol%
Measurement rise time
<
400 ms typically
Accuracy
±
(0.15 vol% +5% of reading)
Gas cross effects
<
0.15 vol% N
2
O
Resolution is two digits when the AA concentration is below 1.0 vol%.
If AA concentration is below 0.1 vol%, 0.0% is displayed.
Identification threshold
0.15 vol% typically
Identification time
<
20 s (for pure agents)
Mixture identification threshold for 2. agent:
0.2 vol% +10% of total conc.
1.2.6
MAC
Range
0...9.9 MAC
Equation:
100
O
ETN
x(AA)
%(ETAA)
=
MAC(AA)
2
%
+
Formula 1
where x(AA): Hal=0.75 %, Enf=1.7 %, Iso=1.15 %, Sev=2.05 %, Des=6.0 %.
1.3
Gas specifications
Airway humidity
0...100 %, condensing
Sampling rate
200
±
20 ml/min. (sampling line 2-3 m, normal conditions)
Sampling delay
2.5 seconds typical with a 3 m sampling line
Total system response time
2.9 seconds typical with a 3 m sampling line, including sampling
delay and rise time
Display update rate
breath-by-breath
Automatic compensation for pressure, CO
2
-N
2
O and CO
2
-O
2
collision broadening effect.
Warm up time
2 min. for operation with CO
2
, O
2
, and N
2
O
5 min. for operation of anesthetic agents
30 min. for full specifications
Autozeroing interval
Immediately after ‘calibrating gas sensor’ and 2, 5, 10, 15, 30, 45,
60 minutes after start-up, then every 60 minutes