Covita micro+ smokelyzer Operating Instructions Manual

breath analysis is the new blood test

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Issue 8 - February 2011, Part No: LAB284

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2

Micro+ Operating Manual

English

Contents

1 Intended Use 3

2 Introduction 3

3 Warnings 4

Contraindications 4

Caution 4

4 Quick Start Guide 5

5 Pack Contents List 6

6 Specification 6

7 Instrument Layout 7

8 Display symbols 8

9 Maintenance 9

Cleaning 9

10 Operation 10

Breath Test 11

11 Settings 12

Sounder 12

User Proles 12

Breath-hold Countdown Timer 12

Date and Time 12

System Information 12

Zero/Calibration 13

12 Patient Information 14

13 Troubleshooting 15

14 Returns Procedure 16

15 Spares and Warranty 17

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Micro+ Operating Manual

English

Intended Use

The Micro+ Smokerlyzer® is a breath carbon
monoxide monitor intended for multi-patient
use by healthcare professionals in smoking
cessation programmes and as an indicator
of carbon monoxide poisoning in a health
care environment.

Introduction

Carbon monoxide is a toxic, odourless,
colourless, tasteless gas. It is formed from
incomplete combustion of organic material
at high temperatures with an insufcient
oxygen supply.

When inhaled, CO competes successfully
with oxygen in the bloodstream to form
carboxyhaemoglobin (COHb). This starves
the body tissues of the oxygen vital to
repair, regeneration and general living. CO
can remain in the blood stream for up to
24 hours, depending on a range of factors
including physical activity, gender and
inhalation intensity. The half-life is about 5
hours.

CO (ppm)/carboxyhaemoglobin (%COHb)
correlation:

Breath carbon monoxide is measured
in parts per million (ppmCO) and blood
carboxyhaemoglobin in percentages
(%COHb). The two are compatible and
convertible, CO relating to lung/breath
and COHb to blood gas – the Micro

+

displays both measurements. Clinical
research has demonstrated that a useful
relationship between carbon monoxide
and carboxyhaemoglobin is obtained by
a short period of breath holding by the
person.

1

CO readings demonstrate the
levels of poisonous inhaled CO while the
COHb reading shows the percentage of
vital oxygen that has been replaced in the
bloodstream.

Smoking status

The cut-off between smoker and non­smoker is likely to be 6ppm CO.

2

The

Micro

+

uses a coloured trafc light system
to motivate the patient to give up smoking.
There are a number of clinical studies that
have found other cut-off points to determine
smoking status. The Micro

+

is supplied with
two set proles and the ability for the user to
set additional proles.

These prole settings are designed to
provide motivation to the patient to give
up smoking and therefore should only be
used as an indication of smoking habit.
The different prole settings affect only
the colour classication displayed, not the
smoker’s CO reading.

The Micro

+

also has the capability to
estimate foetal carboxyhaemoglobin
(%FCOHb) – the equivalent
carboxyhaemoglobin levels present in the
foetus in correlation to a pregnant mother’s
expired CO levels.

3

This measurement is
not for the diagnosis of CO poisoning but as
an indication of the level of CO present in
the foetus and is used solely to motivate the
mother to give up smoking.

Indication of CO poisoning

If an unexpectedly high reading is displayed,
this could indicate CO poisoning. In this
case the patient should be referred to
the appropriate medical facility for further
investigation and treatment.

The %FCOHb is derived by calculation from
the patient COppm reading and therefore
should not be taken as an indicator of CO
poisoning of the foetus. This is used solely
to motivate the mother to give up smoking.

1

R.West; Effect of duration of breath holding on expired air carbon monoxide concentration in cigarette smokers; Addictive Behaviours,

Vol 9 (1984), 307-309

2

E.Middleton, A.Morice; Breath carbon monoxide as an indication of smoking habit; Chest (2000) 117, 758-763

3

C.Gomez,I.Berlin, P.Maruis, M.Delcroix; Expired air carbon monoxide concentration in mothers and their spouses above 5ppm is

associated with decreased foetal growth; Preventive medicine 40 (2005) 10-15

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Micro+ Operating Manual

English

Warnings

● If an unexpectedly high CO reading

is displayed, this could be due to CO
poisoning. Seek further medical advice.

● Never use alcohol or cleaning agents

containing alcohol or other organic
solvents as these vapours will damage
the CO sensor inside.

● Under no circumstances should the

instrument be immersed in liquid or
splashed with liquid.

● People with lung disease or chest

ailments may not be able to achieve
the breath-hold. In such cases, the
user should inhale and hold their
breath when the breath test is started,
and exhale, if necessary, before the
countdown has completed. This may
result in a lower reading, but may still
provide an indication of a smoking habit.

● During start-up, if the

icon is

displayed then calibration is due.
Please refer to page 13 for instructions.
The unit may give false readings if not
calibrated.

● During start-up if the

icon
is displayed then the D-piece requires
changing. It is recommended that the
D-piece is changed every month or
earlier if visibly soiled.

● The battery life is indicated by the

icon. When the

icon is displayed

the batteries should be changed.

● The disposable cardboard mouthpieces

are single-use only as re-use can
increase the risk of cross-infection.

● See Bedfont’s Infection Control and

Maintenance Guidelines for further
information on infection control.

● Changing prole settings does not affect

the smoker’s CO reading, only the trafc
light colour classication displayed.

● Care should be taken not to cover the

exhaust port of the instrument during
a breath test. Labels should never be
placed over this outlet.

● The USB port should be used to

connect to a PC, in order to run the
COdata+ PC software please ensure
that the monitor is only connected to
a computer that is manufactured in
accordance with EN60950.

● Keep the PC out of reach of the patient

when the Micro

+

is connected.

Contraindications

● The sensor has a cross-sensitivity to

hydrogen which could affect the CO
result. Hydrogen could be present on
the breath due to certain gastrointestinal
conditions. The sensor also has a cross­sensitivity to nitric oxide and ethylene.

● Temperature may affect the accuracy of

the Micro

+

. The instrument should be
calibrated at the temperature at which
it is expected to be used. If the Micro

+

is used at a lower temperature than
when it was calibrated the readings
may be lower. When used at a higher
temperature than calibrated the
readings may be higher.

Caution

Federal law restricts this device to sale by
or on the order of a physician.

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Micro+ Operating Manual

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To view the corresponding
%FCOHb, touch the

.

Remove and dispose of the cardboard
mouthpiece safely.

Remove the D-piece between tests to
allow fresh air to purge sensor.

Touch

to perform another breath

test. A new mouthpiece is required.

To switch off, press the on/off button for
3 seconds. Unit will also auto power-off
after 5 minutes of inactivity.

Quick Start Guide

Press the on/off button until the display
becomes active. Release the button.

Insert the D-piece into the instrument

and t a new cardboard mouthpiece.

Touch the

icon to start

a breath test.

This starts the breath-hold
countdown. The patient
should inhale deeply and
hold their breath while
the display counts down
to zero. If unable to hold
their breath for the full countdown, see
Warnings on page 4 or Settings on
page 12.

The audio bleep will sound during the
last three seconds of the countdown.

At end of the countdown,
the patient should
blow slowly into the
mouthpiece, and exhale
until their lungs are
empty.

The ppm and %COHb
value will rise, and the
highest level will hold.

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