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VM-2101 User Manual Viamed Ltd. 2008
3. Error Messages – Problems
– Corrective Actions
Physiological conditions, medical procedures, or exter-
nal agents that may interfere with the finger oximeter’s
ability to detect and display accurate measurements
include:
• Incorrect application of the finger oximeter
• Placement of the finger oximeter on an extremity
with a blood pressure cuff, arterial catheter,
or intravascular line
• Excessive patient activity
• Intravascular dyes
• Externally applied colouring agents, such as
nail polish
• Failure to shield the application site with opaque
material in high ambient light conditions
• Venous pulsation
• Dysfunctional haemoglobin
• Low perfusion
3.2 Error Messages – Causes
Display shows “-- --”
The finger has been removed from the finger oximeter.
Check that the finger is correctly inserted into the
finger oximeter.
“Low battery!”, battery symbol blinking red
The battery is almost completely discharged.
Replace batteries immediately.
3.3 Problems – Causes – Corrective Actions
Problem: There is no response to the power but-
ton. Cause/Corrective Action: Ensure that the power
button is fully depressed. The batteries may be mis-
sing, discharged, or oriented incorrectly. Install new
batteries.
Problem: No pulse signal found
Cause/Corrective Action: Check the patient. Check
that the finger oximeter is placed correctly. Test the
monitor on another subject.
Perfusion may be too low for the monitor to track the
pulse. Check the patient. Test the monitor on yourself.
Change the application site.
3.1 General Information
Interference due to patient activity may be preventing
the monitor from tracking the pulse.
Keep the patient still, if possible. Change the appli-
cation site.
There may be interference due to ambient light, or the
finger oximeter may be on an extremity with a blood
pressure cuff, arterial catheter, or intravascular line.
Reposition the finger oximeter, as necessary.
Electromagnetic interference may be preventing the
monitor from tracking the pulse. Remove the source
of interference.
3.4 EMI (Electromagnetic Interference)
Caution: This device has been tested and found to
comply with the limits for medical devices according
to EN 60601-1-2, (second edition), and the Medical
Device Directive 93/42/EEC. These limits are desig-
ned to provide reasonable protection against harmful
interference in a typical medical installation.
Due to the proliferation of radio-frequency transmit-
ting equipment and other sources of electrical noise
in healthcare environments, it is possible that high
levels of such interference due to close proximity, or
strength of a source, may result in disruption of perfor-
mance of this device. Examples of noise sources in
healthcare environments that could cause electromag-
netic interference include:
• Electrosurgical units
• Cellular phones
• Mobile two-way radios
• Electrical appliances
• High-definition televisions (HDTVs)
The pulse can be obscured by electromagnetic inter-
ference. During such interference, measurements may
seem inappropriate or the finger oximeter may not
seem to operate correctly.
Disruption may be evidenced by erratic readings,
cessation of operation, or other incorrect functioning.
If this occurs, the operating environment should be
surveyed to determine the source of disruption, and
the following actions taken to eliminate the source: