Mindray BeneVision N1 User Manual

BeneVision N1 Patient Monitor Operator’s Manual 14 - 1
14 Monitoring Carbon Dioxide (CO
2
)
14.1 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 is used to monitor the patient’s respiratory status. The sidestream/Microstream CO
2
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 built into the Sidestream or Microstream CO
2
module.
The sidestream CO
2
module can be configured with a paramagnetic oxygen sensor to measure O
2
. The
paramagnetic oxygen sensor measures oxygen based on its paramagnetic properties.
The sidestream and microstream CO
2
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.
WARNING
• The N1 monitor does not support CO
2
measurements when used for transporting patients by rotary
or fixed-wing ambulance.
• It is not recommended to measure O
2
when transporting a patient with the N1 monitor. Shaking the
CO
2
module during O
2
measurement may lead to a distorted O
2
waveform or inaccurate O
2
measurement.
14.2 Identifying CO
2
Modules
To measure CO
2
, use either the internal CO
2
module or the external CO
2
module. The external CO
2
module is
connected to the N1 through the Modular Rack. For the connection of the N1 and the external CO
2
module, see
section
2.8.1Installing the N1 or External Parameter Module into the Modular Rack.
In sequence from left to right, the following are sidestream CO
2
external module, microstream CO
2
external
module, and N1 monitor with internal CO
2
module.
(1)
(2)
(4)
(3)
(1)
(5)
(4)
(2)
(6)

Mindray BeneVision N1 Specifications

General

Brand	Mindray
Model	BeneVision N1
Category	Medical Equipment
Language	English