Biolight Q7 User Manual

Patient Monitor User’s manual
13-1
Chapter 13 Carbon Dioxide (CO
2
)
13.1 Introduction
The monitor adopts infrared absorption technology to measure the carbon
dioxide (CO
2
) concentration in the breathing airway of patient. Because CO
2
molecule can absorb infrared light of special wavelength, and the amount of
absorbed infrared light directly relates to the concentration of CO
2,
therefore
while the infrared light radiated from the infrared light source passing through
the gas sample containing CO
2
, part of energy will be absorbed by CO
2
in the
gas. At another side of infrared light source, a photodetector is used to
measure the remaining infrared energy and convert it to electric signal, which
will be compared with the energy of infrared light source and adjusted so as to
correctly reflect the CO
2
concentration in the gas sample.
There are two methods for measuring carbon dioxide in the patient’s airway:
1. Mainstream: Uses a CO
2
sensor attached to an airway adapter directly
inserted into the patient’s breathing system.
2. Sidestream/Microstream: Takes a sample of the respiratory gas with a
constant sample flow from the patient’s airway and analyzes it with the CO
2
sensor.
If you use AG module to measure CO
2
parameter, the details refer to
chapter 14 AG.
13.2 Monitoring Procedure
13.2.1 Mainstream CO
2
Module
1. Attaching the CO
2
sensor cable
Plug the cable of CO
2
sensor into CO
2
connector on the monitor.
2. Selecting a proper airway adapter
Select an airway adapter based on the patient's size, ET tube diameter and
monitoring situation. For more information refer to the following table or
contact manufacturer.

Biolight Q7 Specifications

General

Brand	Biolight
Model	Q7
Category	Medical Equipment
Language	English