Mindray BeneVision N Series User Manual

BeneVision N Series Patient Monitor Operator’s Manual 23 - 1
23 Monitoring Carbon Dioxide (CO
2
)
23.1 CO
2
Introduction
CO
2
monitoring is a continuous, non-invasive technique for determining the concentration of CO
2
in the
patient’s airway by measuring the absorption of infrared (IR) light of specific wavelengths. CO
2
has its own
absorption characteristic and the amount of light passing the gas probe depends on the concentration of the
measured CO
2
. When a specific band of IR light passes through respiratory gas samples, some of IR light will be
absorbed by the CO
2
molecules. The amount of IR light transmitted after it has been passed through the
respiratory gas sample is measured with a photodetector. From the amount of IR light measured, the
concentration of CO
2
is calculated.
CO
2
measurement are used to monitor the patient’s respiratory status. The following two methods are used for
measuring CO
2
:
■ Mainstream CO
2
measurement
Directly insert a CO
2
sensor into the patient's breathing system.
■ Sidestream/Microstream CO
2
measurement
Take 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 built into the Sidestream or Microstream CO
2
module.
The sidestream CO
2
module can be configured with a paramagnetic oxygen sensor. The paramagnetic oxygen
sensor measures oxygen relying on its paramagnetic properties.
The mainstream CO2 measurement can be used, with specified accessories, with intubated adult, pediatric and
neonatal patients. The sidestream and microstream CO2 measurement can be used, with specified accessories,
with intubated and non-intubated adult, pediatric, and neonatal patients. With intubated patients, a sample of
the respiratory gas is drawn from the patient's breathing circuit through an airway adapter and a gas sampling
line. With non-intubated patients, the gas sample is drawn through a nasal cannula.
CO
2
monitoring is intended for adult, pediatric and neonatal patients.
The following modules are sidestream CO
2
module, microstream CO
2
module and mainstream CO
2
module from
left to right.
If you measure CO
2
using the AG module, see 24Monitoring Anesthetic Gas (AG).
(1) CO
2
menu hard key (2) CO
2
Measure/standby hard key
(3) CO
2
watertrap seat (4) Gas outlet
(5) Sample line connector (6) CO
2
sensor connector
(1)
(2)
(4)
(3)
(1)
(5)
(4)
(1)
(6)
(2)
(2)

Mindray BeneVision N Series Specifications

General

Brand	Mindray
Model	BeneVision N Series
Category	Medical Equipment
Language	English