2
Intended Use
1.
Attach a breath sampling D-‐piece and new mouthpiece.
2.
Turn on the monitor by pressing the power button once.
3.
Press ‘Breath Test’ symbol on screen,
or
.
4.
To cancel the breath test, press
.
5.
Inhale and hold breath for the pre-‐set 15 second countdown.
6.
A beep will sound during the last three seconds of the countdown.
7.
Blow slowly into mouthpiece, aiming to empty lungs completely.
8.
The ppm and equivalent %COHb levels will rise and hold on-‐screen.
Carbon monoxide (CO) is a toxic, odourless, colourless and tasteless gas. It is formed
by the incomplete combustion of organic material at high temperatures, with an insufficient
oxygen s u pply. When inhaled, CO displaces oxygen in the bloodstream to form
carboxyhaemoglobin (COHb). This starves body tissue of oxygen restricting the body’s perfor
mance and causing health i m plications. CO can remain in the bloodstream for up to 24
hours, depending on factors such as physical activity,
sex, and inhalation intensity. The half-‐life is about 5 hours.
CO (ppm), carboxyhaemoglobin (%COHb) and foetal carboxyhaemoglobin (%fCOHb) correlation:
Breath carbon monoxide is measured in parts per million (ppm) and blood carboxyhaemoglobin is
measured in percentages (%COHb and %fCOHb). The three are compatible and convertible: the ppm
CO reading relates to gas in the lungs and on the breath (i.e. the amount of poisonous CO that has
been inhaled), and the %COHb and %fCOHb readings relate to the percentage of vital oxygen that
has been replaced in the bloodstream.
The Micro
+
basic
™ Smokerlyzer® displays CO ppm, %COHb and %FCOHb. However all devices on
ly d ire ctly measure CO ppm, the %COHb and %fCOHb is a calculation based on clinical
evidence. Clinical research has demonstrated that a useful relationship between carbon
monoxide and carboxyhaemoglobin is obtained after a short period of breath-‐holding.
The cut-‐off point between smoker and non-‐smoker differs based on local regulation,
Bedfont have created cut-‐off levels as a guide
only, see ‘Traffic Light Pre-‐set Cut off Levels’, these can be alt ered
in-‐line with your local regulations from the settings screen.
Taking a breath test
The M icro
+
basic
™ Smokerlyzer® is a breath carbon monoxide monitor intended for multi-‐patient
use by healthcare professionals in smoking cessation programmes and research. They can
also be us ed as an indicator of carbon monoxide poisoning in a healthcare environment.
Introduction
