Biocare PM-900, Руководство пользователя

Страница: 91 / 182

Chapter 6 Parameter Monitoring
User Manual of Veterinary Monitor --79--
6.8 CO
2
(Optional)
6.8.1 General Description
The monitor adapts an infrared absorption technique to measure the CO
2
concentration in the animal‘s airway. Its
principle is based on the CO
2
molecular absorption of infrared optical energy of a certain wavelength and the
absorbed energy is directly related to the CO
2
concentration. When the infrared rays emitted from an infrared
source penetrate through a CO
2
-containing gaseous sample, part of their energy will be absorbed by the CO
2
in the
gaseous sample. A photo detector is employed at the other side of the infrared source to detect the remaining
infrared optical energy and convert it to electrical signals. Then the CO2 concentration in the gaseous sample can
be accurately reflected by comparing and regulating the electrical signals and the energy of the infrared source.
Intented use:
It is used to connect with other medical devices to display the CO
2
data in real-time or being derived. It is
connected to animal‘s breathing circuit, so as to monitor the inhaled or exhaled air during the process of
anaesthesia, recovery and respiratory disease care. It can be used in the OR, ICU and general wards, with the
animals. The mainstream CO
2
module is often recommended to intubated animals or it can be done through the
special mask; while the sidestream CO
2
module is for both intubated and non-intubated animals. It can be
connected by using a three-way connector and a sampling tube through the breathing circuit or directly connected
through the nasal gas sample.
There are two CO
2
measuring methods:
1. Main-stream Measure
CO
2
sensors are directly mounted on the airway joint of the animal‘s respiratory system.
2. Side-stream Measure
The respiratory gas through the animal‘s respiratory airway is sampled with a constant sampling flow and
then is analyzed by the module-inbuilt CO
2
sensors.
Figure 6.27 CO
2
Wave and Data Display
CO
2
measure provides:
1. A CO
2
waveform
2. End-tidal CO
2
values (EtCO
2
)
3. Forced inspiratory CO
2
values (FiCO
2
)
4. Airway respiration rate (awRR)
Warning

The CO
2
module can be operated only by authorized or well-trained staff and the operator is
required to be familiar with the User manual before using this module.

Don
’t use this CO
2
module where anesthetic and other combustible gases are present in the
environment to avoid any danger of explosion.

Electric Shock Danger: disconnect this CO
2
module before cleaning operations. Don
’t use and
contact authorized maintenance personnel once any damage is found.