User's Manual
Patient Monitor User Manual Monitoring CO
2
- 103 -
Chapter 16 Monitoring CO
2
16.1 Overview
The monitor provides the sidestream and mainstream methods for CO
2
monitoring. EDAN
module and Respironics Sidestream CO
2
module are used for sidestream measuring, and
Respironics Mainstream CO
2
module is used for mainstream measuring.
The principle of CO
2
measurement is primarily based on the fact that CO
2
molecule can absorb
4.3m infrared ray. Absorption intensity is proportional to CO
2
concentration of patient sample,
the CO
2
concentration will compute according to the detecting CO
2
absorption intensity of patient
sample.
z Sidestream measurement takes a sample of the respiratory gas with a constant sample flow
from the patient’s airway and analyzes it with a remote CO
2
sensor. You can measure
Sidestream CO
2
using the monitor’s built-in CO
2
measurement.
z Mainstream measurement uses a CO
2
sensor attached to an airway adapter directly inserted
into the patient’s breathing system.
16.2 CO
2
Safety Information
WARNING
1 Do not use the device in the environment with flammable anesthetic gas.
2 The device should be used by trained and qualified medical personnel authorized by
EDAN.
3 Nitrous oxide, elevated levels of oxygen, helium, xenon, halogenated hydrocarbons,
and barometric pressure can influence the CO
2
measurement.
4 The monitor will be damaged if any pipeline from the CO
2
module is disconnected, or
the air tube /the air inlet /the air outlet are plugged by water or other materials.
5 The accuracy of the CO
2
measurement will be affected by the following reasons: the
airway was highly obstructed; the leakage of air way connection or quick variation of
environment temperature.
6 Follow precautions for electrostatic discharge (ESD) and electromagnetic interference
(EMI) to and from other equipment.
7 In the presence of electromagnetic devices (i.e., electrocautery), patient monitoring
may be interrupted due to electromagnetic interference. Electromagnetic fields up to
20V/m will not adversely affect module performance.
8 Do not place the sensor cables or tubing in any manner that may cause entanglement
or strangulation.
9 Do not store the CO
2
Module at temperatures less than -40º F (-40º C) or greater than
158º F (70º C). Do not operate the CO
2
Module at temperatures less than 32ºF (0º C)
or greater than 104º F (40º C).