Respironics 920M PLUS User manual

Operator’s Manual
Handheld Pulse Oximeter
920M
TM PLUS
1
English/Español

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The information in this manual has been carefully checked and is believed to
be accurate. In the interest of ongoing product development, Respironics
reserves the right to make changes and improvements to this manual and the
products it describes at any time, without notice or obligation.
CAUTION: Federal law (USA) restricts this device to sale by or on
the order of a physician.
CAUTION: Read this entire manual carefully before using the 920M
PLUS Pulse Oximeter.
Respironics Georgia, Inc.
175 Chastain Meadows Court
Kennesaw, Georgia 30144
USA
[phone]
[phone] (USA and Canada)
Fax [phone] (USA and Canada)
www.respironics.com
References to “Respironics” in this manual shall imply Respironics, Inc. Respironics and
920M are registered trademarks of Respironics, Inc.
Finger Phantom, Flexi-Form, and FlexiWrap are registered trademarks or trademarks of
Nonin Medical, Inc.
Windows is a registered trademark of Microsoft, Inc.
© 2002 Respironics, Inc.

Guide to Symbols
Front Panel Symbols
Percent Oxygen Saturation
Pulse Rate
Pulse Quality (tricolor LED)
Low Battery
Front Panel Switches
On/Standby
Advance
Other Symbols
ATTENTION: See Instructions for Use
Not for Continuous Monitoring
(No Alarm for SpO2)
Type BF Applied Part
(Patient isolation from electrical shock)
UL Mark for Canada and the United States
with respect to electric shock, fire, and
mechanical hazards only in accordance with
UL 2601-1 and CAN/CSA C22.1 No. 601.1
Serial Number
(located under the battery cover)
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Table of Contents
Precautions for Use ...................................................1
Indications for Use ................................................... 3
General Description ................................................. 4
Basic Operation ....................................................... 6
Installing and Using the Batteries ............................ 6
Important Notes about Battery Use ........................ 7
Recharging Batteries (NiMH Battery Pack Only) .. 7
Connecting the Sensor ............................................... 8
Power On/Standby .................................................... 9
Power On Self-Test .................................................... 9
Monitoring ................................................................. 10
Cleaning the 920M PLUS Pulse Oximeter ........... 10
Detailed Operation ................................................. 11
Switches and Functions ........................................... 11
Displays and Indicators ........................................... 15
Communications .....................................................17
Serial Output ............................................................. 17
Memory ...................................................................... 17
Specifications .......................................................... 19
Service and Support ............................................... 20
Warranty ..................................................................21
Accessories ............................................................. 22
Troubleshooting Guide .......................................... 24

Precautions for Use 1
Precautions for Use
Contraindications
•Do not use the 920M PLUS in an MRI environment.
•Do not use the 920M PLUS in situations where alarms are required. The
device has no alarms.
Warnings
•Explosion hazard: Do not use the 920M PLUS in an explosive atmosphere.
•The 920M PLUS is intended only as an adjunct in patient assessment. It
must be used in conjunction with other methods of assessing clinical signs
and symptoms.
•Use only Respironics compatible sensors, which are manufactured to meet
the accuracy specifications for Respironics pulse oximeters. Using other
manufacturers’ sensors may cause improper pulse oximeter performance.
•As with all medical equipment, carefully route patient cabling to reduce the
possibility of patient entanglement or strangulation.
•Check the pulse oximeter sensor application site frequently to determine the
positioning of the sensor and the circulation and skin sensitivity of the
patient. Each patient's sensitivity to Respironics sensors may vary
depending on medical status or skin condition.
•Do not use adhesive tape strips if the patient exhibits an allergic reaction.
•Do not stretch the adhesive tape while applying the pulse oximeter sensor.
This may cause inaccurate readings or skin blisters.
•General operation of the 920M PLUS might be affected by the use of an
electrosurgical unit (ESU).
•Do not use a damaged sensor.
Cautions
•Federal law (USA) restricts this device to sale by or on the order of a
physician.
•Before use, carefully read the package insert provided with the sensors.
•The 920M PLUS is intended for spot-checking or monitoring by an
attending healthcare professional. Because the 920M PLUS has no SpO2
alarms, international labeling requirements (EN 865) dictate it be labeled
not for continuous monitoring, as indicated by the symbol.
•The 920M PLUS Pulse Oximeter is not an apnea monitor.
•Verify that all visible indicators illuminate during the startup (initialization)
sequence. If any indicator is not lit, do not use the 920M PLUS. Contact
Respironics Customer Support for repair or replacement.
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2Precautions for Use
•The 920M PLUS Pulse Oximeter must be able to measure the pulse
properly to obtain an accurate SpO2measurement. Verify that nothing is
hindering the pulse measurement before relying on the SpO2measurement.
•Some nail polish colors (particularly dark shades) or artificial nails may
reduce light transmission and affect SpO2accuracy. Remove any nail polish
or artificial nails before using the 920M PLUS.
•The 920M PLUS may not work on all patients. If you are unable to achieve
stable readings, discontinue use.
•The 920M PLUS may misinterpret motion as good pulse quality. Minimize
patient motion as much as possible.
•The 920M PLUS Pulse Oximeter is designed to determine the percentage
of arterial oxygen saturation of functional hemoglobin. Significant levels of
dysfunctional hemoglobin may affect the accuracy of the measurement.
•Cardiogreen and other intravascular dyes, depending on the concentration,
may affect the accuracy of the SpO2measurement.
•Ear Clip sensors are not recommended for pediatric or neonatal use; their
accuracy of these sensors has not been established.
•Do not immerse the 920M PLUS or Respironics sensors in liquid.
•Do not use caustic or abrasive cleaning agents on the device or sensors.
•The 920M PLUS Pulse Oximeter is a precision electronic instrument and
must be repaired by trained Respironics-designated personnel only.
•Do not use different types of batteries at the same time, and do not mix
fully charged and partially charged batteries at the same time.
•Do not remove any covers (except the battery cover) when replacing
batteries. There are no user-serviceable parts inside other than the
replaceable batteries.
•Follow local ordinances and recycling instructions regarding disposal or
recycling of the device and device components, including batteries.
•Batteries may leak or explode if used or disposed of improperly.
•Remove the batteries to avoid the risk of leakage if the 920M PLUS is going
to be stored for more than one month.
•This equipment complies with International Standard EN 60601-1-2:1993
for electromagnetic compatibility for medical electrical equipment and/or
systems. This standard is designed to provide reasonable protection against
harmful interference in a typical medical installation. However, because of
the proliferation of radio-frequency transmitting equipment and other
sources of electrical noise in healthcare and other environments (for
example cellular phones, mobile two-way radios, electrical appliances), it is
possible that high levels of such interference due to close proximity or
strength of a source may result in disruption of performance of this device.
Cautions
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Indications for Use 3
Indications for Use
The Respironics®920M™ PLUS Handheld Pulse Oximeter is indicated for
measuring and displaying functional oxygen saturation of arterial hemoglobin
(SpO2) and pulse rate for adult, pediatric, and neonatal patients in hospital,
ambulatory, home, and EMS (emergency medical service) environments. The
920M PLUS is intended for spot-checking and/or continuous monitoring
when attended by a trained healthcare professional.
Figure 1. The Model 920M PLUS Pulse Oximeter.
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920M PLUS
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4General Description
General Description
The 920M PLUS is a digital handheld pulse oximeter that displays numerical
values for blood oxygen saturation and pulse rate (Figure 2).
The 920M PLUS operates for approximately 100 hours continuously
between alkaline battery replacements, or for 45 hours with the Rechargeable
NiMH (Nickel Metal Hydride) Battery Pack (optional). The 920M PLUS
requires no routine calibration or maintenance other than replacement of
alkaline batteries or recharging the optional battery pack using the Model
920MPC Charger Stand. (Refer to the Model 920MPC Operator’s Manual.)
Figure 2. 920M PLUS displays, indicators, and switches.
Oxygen saturation and pulse rate values are displayed by light-emitting diode
(LED) digital displays. On each detected pulse, the pulse quality LED blinks.
Patient pulse quality signals are graded as good, marginal, or inadequate and
are indicated as such by the pulse quality indicator blinking green, yellow, or
red, respectively. This simple method gives the user a pulse-by-pulse visual
indication of waveform signal quality without requiring the user to perform
complex waveform analysis.
The 920M PLUS features pulse oximeter sensors for a wide range of patient
monitoring. Each sensor is designed for a specific site application and specific
patient size and weight range. Refer to specific sensor instructional inserts for
more detailed information about sensor use.
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920M PLUS
SpO2Display
(Percent
Oxygen
Saturation)
On / Standy
Switch
Pulse Quality
Indicator
(Tricolor)
Pulse Rate
Display
Pulse Oximeter
Sensor Connector
Advance
Switch
Low Battery
Indicator
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General Description 5
Because the 920M PLUS Handheld Pulse Oximeter has no patient alarms,
frequent observation of SpO2and pulse rate displays is required.
A sensor disconnect or malfunction is indicated by a lack of good pulse
quality blinking and/or a dash to the left of the SpO2value on the LED
display. When adequate pulse signals are not received, the SpO2
and/or pulse rate numerical values will be replaced by dashes. Low and
critically low battery conditions will be indicated by the low battery LED.
Figure 3. Rear view of the 920M PLUS.
The 920M PLUS system includes the following items:
1 Model 920M PLUS Handheld Pulse Oximeter
1 Operator’s Manual
1 Respironics Pulse Oximeter Sensor
4 AA-Size Alkaline Batteries
Confirm that the items listed are packed with the 920M PLUS system. If any
item on this list is missing or damaged, contact your distributor. Contact the
carrier immediately if the shipping carton is damaged.
RESPIRONICS GEORGIA, INC.
KENNESAW, GA USA
MODEL 920M PLUS
PULSE OXIMETER
US PATENT # Re.33,643
2959-400 01
"Contains NONIN Technology"
IEC LR6
4 X 1.5V AA
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US2601-1
Battery Cover Latch
Battery
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6Basic Operation
Basic Operation
Installing and Using the Batteries
The 920M PLUS Handheld Pulse Oximeter can be powered by 4 AA-size
alkaline batteries (which will typically provide 100 hours of continuous
operation), or by the optional Rechargeable NiMH Battery Pack. (See
“Accessories” on page 22.) Respironics does not recommend the use of any other
battery types.
When the batteries are low, the low battery indicator (a yellow LED) will be
steadily illuminated. (See Figure 2 on page 4.) Replace the batteries as soon as
possible. When the batteries are critically low, the low battery indicator will
flash and the pulse oximeter will not operate. The digital displays will go
blank, and the pulse quality indicator will blink yellow or red, but not green.
Replace the batteries immediately.
1. Press the battery cover latch (see Figure 3 on page 5), and remove the
battery cover on the bottom of the 920M PLUS.
2. Insert four new AA-size alkaline batteries or a Rechargeable NiMH
Battery Pack. Be sure to insert the batteries in the correct position, as
indicated by the polarity markings (+ and -) inside the battery
compartment. Refer to Figure 4 on page 8 for an illustration of correct
battery orientation. Proper battery positioning is essential for correct operation.
3. Replace the battery cover and turn on the 920M PLUS. If the unit does
not turn on, see “Troubleshooting Guide” on page 24.
2

Basic Operation 7
Important Notes about Battery Use
Four AA alkaline batteries provide the 920M PLUS with approximately 100
hours of continuous operation, while the Rechargeable NiMH Battery Pack
provides the 920M PLUS with approximately 45 hours of continuous
operation.
Clock/calendar settings can significantly affect battery storage life.
Batteries drain during storage, but they drain much more quickly when the
unit’s clock/calendar functions are set. Refer to “Calendar and Clock
Settings” on page 14 for more information.
With AA Batteries
•If the clock/calendar is not set when the unit is stored, alkaline batteries will
need replacement in 10-12 months if the unit has not been used.
•If the clock/calendar is set when the unit is stored, alkaline batteries will
require replacement in about 6 weeks if the unit has not been used.
•Using the oximeter will shorten the required replacement time.
With Rechargeable NiMH Battery Pack
•If the clock/calendar is not set when the unit is stored, the Rechargeable
NiMH Battery Pack will need recharging at least every 2 months if the unit
has not been used.
•If the clock/calendar is set when the unit is stored, the Rechargeable NiMH
Battery Pack will need recharging at least every 3 weeks if the unit has not been
used.
•Using the oximeter will shorten the required recharging time.
Recharging Batteries (NiMH Battery Pack Only)
•Completely recharging the NiMH battery pack requires approximately 90
minutes when the unit is completely discharged.
•The expected useful life of the Rechargeable NiMH battery pack is 500
charge/discharge cycles, or approximately 10 years, whichever is first. The
battery pack must be charged at least once each year to maintain optimal
battery life.
•AA alkaline batteries cannot be recharged in the charging stand.

8Basic Operation
Note: After removing batteries from the 920M PLUS, you will have
approximately 2 minutes to replace them before losing data stored in
memory and the clock and calendar settings. Replace the batteries
immediately to avoid the loss of stored data.
Figure 4. Installing batteries in the 920M PLUS.
Connecting the Sensor
Connect the pulse oximeter sensor to the top of the 920M PLUS as shown
in Figure 5. Ensure that the sensor is firmly plugged in. Refer to the specific
sensor package insert for pulse oximeter sensor positioning information.
Figure 5. Connecting a sensor to the 920M PLUS.
Battery
Orientation
AA-size
Alkaline
Batteries
Battery
Pack
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Basic Operation 9
Power On/Standby
Turn on the 920M PLUS by pressing and releasing the On/Standby
switch . Turn off the unit by pressing and holding this switch for about 2
seconds. Refer to Figure 2 on page 4 for a detailed illustration of the switches
and indicators. Refer to “Detailed Operation” on page 11 for detailed
information about entering setup mode and on general operation of the
920M PLUS.
Power On Self-Test
When the 920M PLUS is powered on for normal operation by pressing and
releasing the On/Standby switch , the unit will cycle through a startup (or
initialization) sequence before displaying valid data values.
During a startup, always check for any missing indicators or LED display
segments. If any indicator is not lit, do not use the 920M PLUS. Contact
Respironics Customer Support for repair or replacement.
At normal startup (when not entering the setup mode), with fresh batteries,
the 920M PLUS will cycle through the following sequence:
•will appear briefly in the SpO2and pulse rate displays
•the yellow low battery indicator will turn on steadily for a few seconds
•the pulse quality indicator will turn on red for 1 second, then green for 1
second, and then begin to blink
•the clock time currently set in the memory (in hours and minutes, for
example) appears briefly in the displays
•the software revision number (the letter “r” followed by a 3-digit number,
for example) appears briefly in the displays
•(two dashes) will appear in the displays until a valid pulse signal is
detected
Note: When entering setup mode at power on (for memory clear, calendar, or
clock settings), the 920M PLUS will cycle through a startup sequence
similar to the above, with the following exceptions: 1) The pulse quality
indicator will first turn on red for 1 second, then green for 1 second, but
will then turn off and not blink until after exiting setup mode; 2) the
software revision number will not appear; and 3) the two dashes will
appear only after exiting setup mode.
888
888
04
41
r
018
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10 Basic Operation
Monitoring
Verify that the pulse oximeter sensor is properly positioned (on a finger, for
example). Ensure that the pulse oximeter is sensing adequate pulse quality by:
•verifying that the pulse quality indicator is blinking green and
•verifying that the pulse rate and SpO2displays are showing readings and
•verifying that the pulse quality indicator blinking is correlated to the pulse rate
for at least 10 seconds
If the pulse quality indicator light is blinking red or yellow or is blinking
erratically, reposition the pulse oximeter sensor or try a different sensor.
If a finger, toe, etc., is not properly inserted into the pulse oximeter sensor, or
no pulse oximeter sensor is attached to the pulse oximeter after startup (a few
seconds after powering on), both the SpO2 and pulse rate displays will display
a single dash until a valid pulse signal is detected.
Cleaning the 920M PLUS Pulse Oximeter
Clean the 920M PLUS Pulse Oximeter separately from the sensors. For
instructions on cleaning pulse oximeter sensors, refer to the respective pulse
oximeter sensor package inserts.
Clean the 920M PLUS with a soft cloth dampened with isopropyl alcohol. Do
not pour or spray any liquids onto the 920M PLUS, and do not allow any liquid
to enter any openings in the device. Allow the 920M PLUS to dry thoroughly
before reusing.
CAUTION: Do not immerse the 920M PLUS in liquid, and do not
use caustic or abrasive cleaning agents on the 920M PLUS.
2

Detailed Operation 11
Detailed Operation
Switches and Functions
All functions of the 920M PLUS are controlled by the On/Standby and
advance switches found on the front of the unit. Refer to Figure 2 on
page 4 for an illustration of the switches and indicators.
Power
Turn on the 920M PLUS by presing and releasing the On/Standby switch
on the front of the unit. Turn off the unit by pressing and holding this switch
for about 2 seconds. Refer to “Power On Self-Test” on page 9 for important
information about starting up the 920M PLUS.
In order to conserve battery life, the 920M PLUS will automatically power off
after 10 minutes of inactivity. Inactivity is indicated by dashes on the displays
and may be caused by the following conditions:
•the sensor is not connected to the pulse oximeter
•the sensor is not attached to the patient
•the patient pulse signal is inadequate
Setup Mode
Setup mode is used to set 1) the memory clear function, 2) the calendar and
clock, and 3) the memory playback function. (To initiate the memory
playback, refer to “Memory Playback” on page 18.) In setup mode, the
advance switch and the On/Standby switch are used to make the
selections.
Note: Setting the month to “00” disables the calendar and clock functions and
helps conserve battery life.
Entering Setup Mode
1. With the unit off, press and hold the advance switch while pressing
and then releasing the On/Standby switch .
2. Release the advance switch when is displayed on the SpO2and
pulse rate displays. The clock time currently set in the memory, for
example, appears briefly in the displays, and then appears.
888
888 04
41
Clr
no
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12 Detailed Operation
Making Selections in Setup Mode
1. Upon entering setup mode, the displays will show . (Memory clear
and the default value “no”, the first setting.) Press and release the
advance switch (or press and hold to quickly scroll) to change the value
for this setting.
Note: The menu starts at the current value stored in memory for the setting.
The menu will cycle through the range of values for that setting.
2. When the desired value appears, press and release the On/Standby
switch to store the value and advance to the next sequential setting
(year, month, etc.).
3. Continue this process until all settings are chosen.
When the setting sequence has been completed, the 920M PLUS exits
the setup mode and then displays (two dashes). The unit is then ready
to begin normal operation.
Memory Clear, Calendar, and Clock Settings
Setting
Appears in
SpO2Display:
Range of Values
Appears in
Pulse Rate Display:
Default
Value
Memory Cleara
aChoosing “yes” for both the Clr and del settings (the memory clear
function) will clear the memory and exit setup mode.
Clr yes or no no
Delete (confirm clear) del yes or no no
Year y00 -99 00
Month nn 00 -12 00
Day d01 -31 00
Hour h00 -23 00
Minute nn 00 -59 00
(Not available)b
bPrn settings 00 to 15 are not used at this time. Setting these values will
not affect the operation of the 920M PLUS.
Prn 00-15 00
Clr
no
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Detailed Operation 13
Clearing Memory
Upon entering setup mode, “Clr” will appear in the SpO2display,
indicating the memory clear function. (Refer to “Setup Mode” on page 11.)
This function allows you to delete all data currently stored in memory. Refer
to Figure 6 below for a diagram describing the memory clear settings.
To Choose Memory Clear Settings:
1. “Clr” may be set to “no” or “yes”.
If “no” is entered in response to “Clr” (indicating that you do not
want to clear the memory), the setup mode will continue directly to the
calendar and clock settings. (Refer to “Calendar and Clock Settings” on
page 14.)
If “yes” is entered in response to “Clr”, then “del” will next
appear in the SpO2display, again with a choice of “no” or “yes”.
This redundant prompting gives you a second opportunity to avoid
clearing the memory.
Make the “Clr” selection. Use the advance switch to scroll through
the values. Use the On/Standby switch to accept a value and move to
the next setting.
2. If “no” is entered in response to “del”, the setup mode continues to
the calendar and clock settings.
If “yes” is entered in response to “del”, (confirming that you do
want to clear the memory), then “dne Clr” will briefly appear in the
displays indicating that the memory is cleared. The 920M PLUS will
then exit setup mode and is ready to begin normal operation.
Make the “del” selection.
Figure 6. Choosing memory clear settings.
YES
del Confirm "yes" to
clearing the memory?
YES
dne
clr
Begin normal operation.
NO
(default)
Continue to the
calendar and clock
settings.
Continue to the
calendar and clock
settings.
CLr
Clear the memory?
NO
(default)
Use the advance switch to scroll
through the values.
Use the on/standby switch to accept a
value and move to the next setting.
2

14 Detailed Operation
Calendar and Clock Settings
Note: Setting the month to “00” disables the calendar and clock functions and
helps conserve battery life.
Refer to Figure 7 below for a diagram describing the calendar and clock
settings.
Choosing Calendar and Clock Settings:
1. After selecting “no” in the
memory clear settings, “y” will
appear in the SpO2display,
indicating the calendar year
setting.
2. Make the year, month, day, hour,
and minute selections. Use the
advance switch to scroll through
the values. Use the On/Standby
switch to accept a value and
move to the next setting.
3. After selecting the minutes,
“Prn” will appear in the SpO2
display. However, the “Prn”
setting is not used at this time.
Press and release the On/Standby
switch to exit setup mode.
When the setting sequence has been
completed, the 920M PLUS displays
(two dashes). The unit is then ready
to begin normal operation.
Figure 7. Choosing calendar and clock settings.
CLr Clear the memory?
del Confirm clearing the memory?
prn Setting not available.
Press and release the
on/standby switch to exit setup.
-
-
Begin normal operation.
Continue to the calendar and clock settings.
NO (default)
nn
Set the minute, 00 through 59.
h
Set the hour, 00 through 23.
Note:This is a 24-hour clock.
d
Set the day, 01 through 31.
nn
Set the month, 00 through 12.
y
Set the year, 00 through 99.
Use the advance switch to scroll through
the values.
Use the on/standby switch to accept a value
and move to the next setting.
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