EtCO
2
Maintenance 2: Maintenance
25
Servicing the Mainstream and Sidestream Sensors
Setting Ambient Pressure
Ambient pressure depends on your facility’s altitude above the sea level. If your healthcare facility is
located in a tall building, then you may consider the floor altitude influence on the ambient pressure.
The ambient pressure variations due to the weather and air temperature changes usually are not
significant enough and may be ignored.
Verify and, if necessary, adjust the Ambient Pressure setting after your HeartStart XL+ gets moved to a
different location, especially to a different altitude.
WARNING: Wrong Ambient Pressure settings may alter the clinical picture.
Set the Ambient Pressure to the prevalent normal atmospheric pressure for your location. If this value is
not known, use the approximate values from Tab le 4 on page 25.
Table 4 Approximate Ambient Pressure at Different Altitudes
Altitude above the sea level Ambient
Pressure
(mmHg)
Comment, Example
meters feet
5000 16400 400 HeartStart XL+ lower pressure limit
4200 13800 450 El Alto, Bolivia
3250 10700 500 La Paz, Bolivia
2700 8850 540 Bogota, Columbia; Quito, Ecuador
2300 7540 570 Addis Ababa, Ethiopia; Mexico City, Mexico
1900 6230 600
1550 5100 630 Denver, CO; Nairobi, Kenya
1170 3840 660 Calgary, Alberta; Salt Lake City, UT; Yerevan, Armenia
810 2660 690 mean land elevation
90% of the world population live below this altitude.
690 2260 700 Almaty, Kazakhstan; Madrid, Spain; Las Vegas, NV
570 1870 710 Bern, Switzerland; Tbilisi, Georgia
460 1500 720 Munich, Germany; Zurich, Switzerland
340 1100 730 Phoenix, AZ
220 720 740 Delhi, India; Lahore, Pakistan; Vienna, Austria
110 360 750 HeartStart XL+ default value; Chicago, IL; Seoul, Korea
0 0 760 low-rise building on a seashore; Beijing, Berlin, Paris
–100 –330 770 Furnace Creek Airport, Death Valley, USA
–210 –690 780 Tiberias, Israel
–320 –1050 790
–650 –2100 820
–950 –3100 850 HeartStart XL+ upper pressure limit
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