Ohmeda 5250 User manual

5250 Respiratory Gas Monitor
Operation and Maintenance Manual
S
G
a
aie
Display
Mi Release
of
A BOC Health Care
Company
Critical Care

RIEL WE E YU
Figure 2-1 5250 RGM Front Panel Display...... 2-1
Figure 2-2 Display Release a 2-2
Figure2-3DisplayRemoval............................ 2-2
Figure 2-4 Sample Filter Cartridge
Replacement ............ ини 2-3
Figure 2-5 5250 RGM Back Panel.................... 2-4
Figure 2-65250RGMDbDisplay.......................... 2-6
Figure 2-7 5250 RGM Display Versions .......... 2-7
Figure 2-8 Setup Screen Changes ................. 2-12
Figure 2-9 Waveform/Trend and
ScaleSelection............................ 2-13
Figure 2-10 Changing Alarmlimits.............. 2-15
Figure 3-1 Respiratory Gas Zero and Span
Calibration... urine 3-2
Figure 3-2 Calibration Gas Connection........... 3-3
Figure 3-3 Patient Circuit O, :
Sensor Calibration ................ 0... 3-4
Figure 4-1 Patient Circuit Adapters
(Proximal) eee 4-1
Figure 4-2 Typical valid plethysmographic
WaveforMm........................... 1.11. 4-2
Figure 4-3 Noisy plethysmographic
waveforr 이 이니 이 아 이 어 아 아 아 아 아 마 아 아 의 4-3
Figure 4-4 Patient Circuit Adapter
Connection Location...................... 4-4
Figure 4-5 GMS Pressure Gauge
Coupling Installation ..................... 4-5
Figure 4-6 Flow Sensor Connection ................ 4-6
Figure 4-7 Sensor Clip Replacement After
Mmtubation........................... 4-6
Figure 4-8 Proper Sensor and Clip Positioning in
Distal Mounting ーー……… 4-7
Figure 7-1 Sample Filter Cartridge
Replacement ................ 7-3
Figure 7-2 Auto Zero Scrubber Replacement
(Agent Version Only) .………………………………… 7-3
Figure 7-3 Cleaning the Sample Chamber...... 7-5
Figure 8-1 Fuse Replacement .......................... 8-5
Figure 8-2 Signal Processing Software
Replacement.......................... 8-6
Figure 8-3 Display Processing Software
Replacermnent iene 8-6
Figure 8-4 Internal Oxygen Sensor
Replacement „r 8-7
Figure 8-5 Replacing the Sensor Cartridge ..
Figure 8-6 Transducer cartridge replacement 8-9
Figure 8-7 Sensor clip removal from the
breathing CÍrCuit „ee 8-9
Figure A-1 Service Screen ーーーーー A-1
Figure A-2 Pneumatics Service Screen .......... A-2
Figure A-3 Service Calibration Screens.......... A-3
User Responsibility
This Product will perform in conformity with the
description contained in this operating manual
and accompanying labels and/or inserts, when
assembled, operated, maintained, and repaired
in accordance with the instructions provided.
This Product must be checked periodically. A
defective Product should not be used. Parts that
are broken, missing, plainly worn, distorted, or
contaminated should be replaced immediately.
Should such repair or replacement become
necessary, Ohmeda recommends that a tele-
phone or written request for service advice be
made to the nearest Ohmeda Regional Service
Center.
This Product or any of its parts should not be
repaired other than in accordance with written
instructions provided by Ohmeda and by
Ohmeda trained personnel. The Product must
not be altered without the prior written ap-
proval of Ohmeda's Safety Department. The
user of this Product shall have the sole respon-
sibility for any malfunction that results from
improper use, faulty maintenance, improper
repair, damage, or alteration by anyone other
than Ohmeda.
CAUTION: Federal law in the USA and Canada
restricts this device to sale by or on the order
of a licensed medical practitioner.
©The BOC Group Inc 1988, 1989, 1990
All rights reserved. No part of this publication
may be reproduced in any form without written
permission from Ohmeda.

ェ ーーー απ πο στ JO ee Ne LA
TT TIE
this manual:
e Warnings alert the user to potential product
use or misuse that could harm the user or
others.
e Cautions alert the user to potential product
use or misuse that could harm the product,
associated equipment, or the surrounding
environment.
The warnings and cautions that appear in the
text of this manual are described in the following
sections.
À Warnings
The Ohmeda 5250 Respiratory Gas Monitor
(RGM) does NOT have the ability to identify
anesthetic agents. If the agent selected on the
monitor is not the agent delivered to the patient
circuit, the values will be inaccurate. If a mixture
of anesthetic agent is delivered, the monitor may
not indicate accurate values.
In the presence of alcohols, ketones, or other
organic hydrocarbon vapors, the 5250 RGM will
not indicate accurate readings of anesthetic
agent. This includes their presence not only in
the sample line or patient circuit, but also ethyl
alcohol present in a patient's bloodstream.
Handle the 5250 RGM with care. Damage to the
RGM or inaccurate operation may result from im-
proper handling.
Do not operate the 5250 RGM unless it is prop-
erly calibrated. Inaccurate patient parameter
readings will result.
Keep the circuit O, sensor attached to the unit to
assure accuracy of O, readings. If detached, the
sensor must be reattached and stabilized for an
equivalent length of time (up to a maximum of 14
hours) before recalibrating.
If the RGM fails to respond as described in the
calibration procedure, do not use that portion of
the monitor until the malfunction is corrected.
For the 5250 RGM without Agent, use only
Ohmeda calibration gas or calibration gas of 6%
CO,, 50% O,, and 44% N,O (40.05 volume %
gravimetric standard). For the 5250 RGM with
Agent, use only Ohmeda calibration gas of 4%
halocarbon-22, 6% CO,, 40% N,0, and 50% O,.
Refer to Section 6.1 to order calibration gas.
SpO, data is NOT collected when electrosurgical
interference is detected. If long periods of inter-
ference exist, the values for SpO, and pulse rate
are shown as dashes.
Use only Ohmeda probes with Ohmeda oxime-
ters and monitors; otherwise, patient injury or
equipment damage may result.
continued circulation distal to the probe site after
application.
ーー ご ピピ デー ぐー
Patient Safety—Prolonged monitoring or patient
condition may require changing the probe test
site periodically. Change the probe site at least
every four hours to reduce the risk of blistering,
skin erosion, or ischemic skin necrosis (especially
if the site is poorly perfused).
Do not place the airway pressure adapter on the
expiratory check valve of the absorber. Blockages
in the tubing circuit can cause high patient
airway pressures and may not be detected by
the RGM.
The Minute Volume and Tidal Volume alarms are
usable only if the TVX flow cartridge is installed
in the correct section of the breathing circuit.
Operate the 5250 RGM only with the TVX flow
cartridge placed in the expiratory limb or com-
mon airway of the breathing circuit. If the flow
sensor is placed in the inspiratory limb, the RGM
will not provide exhaled volume data.
If the 5250 RGM is used with a hanging bellows
type anesthesia ventilator, the monitor may
register volumes in spite of circuit disconnection.
Water in the TVX flow cartridge will restrict the
motion of its internal vanes and cause erroneous
tidal volume and minute volume readings.
Position the tubing so that water drains away
from the cartridge and does not accumulate in it.
Exposure of the sensor clip to a direct beam of
light may cause erroneous tidal volume and
minute volume readings. Shield the sensor clip
with opaque material if the reading is suspect.
Distal Mounting: When placing the TVX flow
cartridge on the absorber valve, be certain to
obtain a secure fit, but do not force the cartridge
in place as tightly as possible. Because the
sensor cartridge is tapered, a secure fit can be
achieved without excessive force.
A properly placed cartridge is removable by
hand, but it is advisable that a tool (pliers or
channel lock pliers) be available to remove the
cartridge in case it has been jammed on too
tightly.
Before every use, ensure that the TVX flow
cartridge is operational and easily removable.
The flow sensor must be correctly oriented in the
breathing circuit as indicated by the markings on
the sensor clip. The arrows should point away
from the patient. If the clip is not mounted
correctly, the volume monitor will not operate
properly.

Precautions
The circuit O, display and alarms are only usable
if enabled on the Setup Screen and a calibrated
circuit O, sensor is installed. The RGM must be
calibrated for the currently installed O, sensor.
Do not insert the circuit O, plug into the flow
sensor connector on the back of the machine.
Damage to the monitor could result.
Perform the checkout procedure in Section 5.1
before using the monitor on a patient. If the
monitor fails any test, it must be removed from
use until it has been repaired and checked for
correct operation.
Do not block airflow from the air intake or ex-
haust vents. Inaccurate readings and/or damage
to the RGM may result. Do not place the RGM on
surfaces with above ambient temperatures.
The presence of nebulized agents in the sample
gas, such as Mucomyst (Registered trademark of
Bristol-Myers), may over extended periods of
exposure, tend to obstruct internal RGM filters.
Do NOT use the 5250 RGM in the presence
of flammable anesthetics.
Do not remove the cover of the RGM. Refer
servicing to qualified service personnel.
Service personnel should disconnect the
power cord before servicing the RGM.
For continued protection against fire hazard,
replace only with the same type and rating
of fuse.
A Cautions
Use only the 8-foot sample tube assembly sup-
plied with the monitor. A longer tube may
change the operating characteristics (specifica-
tions) of the monitor, such as degrade the re-
sponse time. Order replacement sample tubes as
listed in Section 6.1.
Avoid storing the monitor and probes at tem-
peratures outside the following range: -20° to
60° C (-4° to 140° F).
When attaching the display panel, ensure that
both the top and the bottom of the display panel
are fully seated into their slides. Failure to fully
seat the display panel may allow the display
panel to fall off and be damaged.
Empty the fluid trap before each patient or
whenever the trap is more than half full. Failure
to empty the trap may allow it to fill while
monitoring a patient and cause the monitor to
stop sampling gas.
Make sure the monitor voltage selected agrees
with the local voltage available.
Do not cover or block the cooling fan.
Connect only a high input inpedance device
(10K ohm or higher) to the analog output
connector. Improper loading will upset the cor-
respondence between the measured voltage
and the intended output voltage.
Use only the power cord supplied with the
RGM. When replacing the power cord, use only
the power cord specified for this RGM.
Pressure in excess of 10 psi above atmospheric
could damage the Paw inlet or sample inlet to
the RGM.
Avoid storing O, sensors outside the following
range: 0º to 26º C (32º to 80º F). O, sensors
must have shorting clips or be connected to the
monitor when in storage or not in use.
When in use, the circuit O, sensor should
always be facing downward to reduce moisture
buildup on its sensing surface.
Do NOT autoclave or pressure sterilize the 5250
Respiratory Gas Monitor.
Do NOT gas sterilize the 5250 RGM.
Never immerse the RGM in liquid. The elec-
tronic circuitry can be short-circuited, causing
permanent damage.
Use the cleaning solution sparingly. Do NOT
saturate the RGM. Excessive solution can flow
into the RGM causing damage to internal com-
ponents.
Following sterilization of the patient circuit
oxygen probe housing (front half only) or the
tee manifold with ethylene oxide, quarantine
parts to allow dissipation of residual ethylene
oxide gas absorbed by the material. Follow
sterilizer manufacturer's recommendations for
procedure and aeration period.
After sterilization with ethylene oxide, the flow
sensor should be quarantined in a well venti-
lated area to allow dissipation of residual
ethylene oxide gas absorbed by the probe.
Follow the sterilizer manufacturer's recommen-
dations for specific aeration periods required.
Never insert cleaning brushes or other foreign
objects through the flow cartridge vanes. The
precision movement may be damaged.
Following flow cartridge sterilization with eth-
ylene oxide, quarantine the cartridge in a well
ventilated area to allow dissipation of residual
ethylene oxide gas absorbed by the cartridge
material. Follow the manufacturer's recommen-
dations for specific aeration periods required. In
some cases, aeration periods of seven days or
more may be required.

Use Lue Levolunenaed cleaning solution spar-
ingly; do not saturate or immerse the flow
sensor clip.
Do not attempt to clean the sample chamber of
an RGM with Agent. Cleaning may cause per-
manent damage to the sensor and void the
warranty.
Follow the sterilizer manufacturer's recommen-
dations concerning procedures and aeration
periods.
Maximum voltage. No more than 5 volts should
appear on any pin of the analog output connec-
tor.
Do not use a strong alkaline detergent to clean
the sample chamber because alkaline detergent
may corrode the aluminum casing.
Only competent individuals trained in the repair
of this equipment should attempt to service it.
Detailed information for more extensive repairs
is included in the service manual solely for the
convenience of users having proper knowledge,
tools, and test equipment, and for service
representatives trained by Ohmeda.
Alter replacing the internal U, sensor, perform
the calibration procedure in Section 3.1 to verify
the RGM is working properly. Allow at least five
minutes for the sensor to stabilize before
calibrating.
After replacing the probe assembly, perform the
calibration procedure in Section 3.2 to verify
that the RGM is working properly. Allow at
least five minutes for the sensor to stabilize
before calibrating.
After replacing the sensor cartridge, perform
the O, sensor calibration in Section 3.2 to verify
that the RGM is working properly. Allow at
least five minutes for the sensor to stabilize
before calibrating.
Never tamper with the set screws in the flow
cartridge. Such action will render the cartridge
unusable.
Malfunctioning flow cartridges must be de-
stroyed to prevent their inadvertent use.

Notes

Bip LUlaliual USSULUJES LILE Proper preparation,
operation, and maintenance of the Ohmeda
5250 Respiratory Gas Monitor (RGM). Read
through the entire manual, with an RGM avail-
able for hands-on experience, before using the
RGM with a patient. Pay special attention to
the warnings and cautions, which appear
throughout the manual and are listed in the
“Precautions” section.
Read the user responsibility statement; it
describes what is expected of the user to
maintain a safe and accurate instrument. Read
the warranty; it describes Ohmeda's responsi-
bility in case of a functional defect.
Keep this manual available for answering
questions that may arise concerning the moni-
tor's operation, its maintenance, or in case of
failure, its repair. The maintenance procedures
in this manual can be performed by the opera-
tor.
Always handle the RGM and accessories with
care to prevent physical damage to the equip-
ment or inaccurate operation.
The 5250 RGM can be ordered with a number of
options. Check the packing slip against the
invoice to ensure you have received what was
ordered. If possible, save the packaging materi-
als for shipping or storing the monitor.
neciion 4 describes the controls ana connectors
for the monitor and the software program used
for the setup and operation of the monitor.
Section 3 explains how to calibrate the monitor
before using it with a patient.
Section 4 describes how to connect the patient
to the RGM for the parameters you are monitor-
ing.
Section 5 details a preoperative checkout
procedure that must be performed before the
RGM is used with a patient. The monitor opera-
tion procedure summarizes the steps required
of the operator before starting to monitora .
patient. :
Section 6 lists the accessories and the specifica-
tions for the 5250 RGM.
Section 7 explains how to clean and sterilize the
5250 RGM and accessories.
Section 8 details how to perform routine opera-
tor maintenance on the 5250 RGM and tells you
what to do if the monitor is not working prop-
erly.
The Appendix has information that you may
need to refer to occasionally and information
about the 78xx ventilator interface.
The software features and functions described in this manual apply to Rev 3.00 or greater of the dis-
play processor. The Service Screen shows your current revision level.
This manual covers the following 5250 Respiratory Gas Monitors:
Bagic ROGMU nen sama sanan sanane sansa aaa en 村 6051-0000-009
(Includes CO, O, ΝΟ, Airway Pressure, Tidal and Minute Volume,
Resp. Rate, and Circuit O,)
Basic RGM with SpO, and PulseRate.....................
Basic RGM with Agent... ses n iene seen ne nzio nec
Basic RGM with Agent, SpO,, and Pulse Rate.......
ee 6051-0000-010
昌和 6051-0000-011
ee 6051-0000-012

Notes

Ar MA NFL NA CL
The Onmeda 5250 Respiratory Gas Monitor
(RGM) provides in one compact package a total
respiratory monitoring solution for the operating
room or intensive care unit.
The RGM uses microprocessor technology to
measure CO,, O,, N,O, and airway pressure. Air-
way flow, anesthetic agent, SpO,, and patient
circuit O, are monitoring options. All of these
parameters are displayed on a 4" by 8" flat
electroluminescent display screen and are inte-
grated with an alarm management system. The
monitor is controlled by infrared touch controls,
and the display is removable for easy access and
viewing.
A kit included with the monitor contains a
pressure sensing tee, patient sample catheters,
airway adapters, a sample chamber cleaning kit
(5250 RGMs without Agent), and calibration gas.
Optional accessories allow the monitoring of
patient circuit O, and airway flow. The SpO, and
anesthetic agent monitoring options may be
either ordered factory installed or added later by
Ohmeda service representatives.
The computer program cartridges are accessible
through the rear panel of the main unit and
through the side panel of the display, which
makes software upgrades and future options
simple to install.
Clock /Calendar
Display
Sample
Inlet
PAW
Inlet
Spo,
Connector
Power
Switch
Display
ВЕН
Display
Release
Alarm
. Lights
Alarm Silence
Figure 2-1
5250 RGM Front Panel
Lİ
calibration procedure.
ON. NANA NN m ZA;
An RS-232 interface provides communication to a
printer, computer, or to an Ohmeda 78xx ventila-
tor.
Note: The "xx" in 78xx represents a variable,
because there are 7800 and 7810 ventilators in
use.
Seven analog output channels are available on
the
rear panel for connection to a strip chart re-
corder.
2.2 Front Panel Controls and
Connectors
Refer to Figure 2-1.
Sample Inlet
The sample inlet connects the patient circuit to
the RGM via a small diameter gas sampling tube.
The connector accepts a male luer lock fitting.
CAUTION: Use only the 8-foot sample tube
assembly supplied with the monitor. A longer
tube may change the operating characteristics
(specifications) of the monitor, such as degrade
the response time. Order replacement sample
tubes as listed in Section 6.1.
Paw Inlet
The Paw inlet allows attachment of the pressure
sensing tube from the patient circuit to the RGM.
Graphic Display Alarm Area
ασια

4/ WCSCLIPULOn
SpO, Connector
The SpO, connector allows attachment of the
nine-pin oximeter probe to the RGM.
CAUTION: Use ONLY the Ohmeda SpO, probes
supplied for this 5250 RGM model. Check the
Identification Number/Serial Number tag, which
is located on the cable near the connector. The
model number must read: MOD 8122-00x or
8121-00x (x represents a digit from 1 through 7).
Power Switch
The power switch turns AC power to the RGM
On (|) or Off (0).
Display Release
Depress this button to slide the display to the
right and permit observation of the water trap or
to remove the display from the chassis. The dis-
play has an 8-foot extension cord attached.
Press
Display
Release
Figure 2-2
Display Release
Align Display
with White Line
To remove the display from the RGM, press the
Display Release push button and slide the
display to the right until the alignment marks,
in the trap area and on the upper right side of
the display, line up as shown in Figure 2-2.
Gently lift the display straight up and pull the
bottom away from the chassis as shown in
Figure 2-3.
To attach the display to the RGM, first coil the
cord in the cord storage box, insert the top of
the display, position the alignment marks at the
top, and gently push the bottom towards the
chassis. Slide the display to the left until the
latch clicks.
CAUTION: When attaching the display, ensure
that both the top and the bottom of the display
are fully seated into their slides. Failure to
fully seat the display may allow the display to
fall off and be damaged.
Align Edge to
Indicator
Slide to Right
Lift Up
BS === FR D
Lift Up
Then
Pull Out
from Bottom

+ LUAALA L'ILE
The fluid trap, located behind the display,
collects fluids separated from the aspirated
patient sample. To remove the trap bottle for
emptying, pull the bottle straight down. The O-
rings can be lubricated with lubricant, such as
Vac Kote’ or Cello Seal?, which are specified
safe for use in an oxygen enriched environment.
To replace the bottle push the bottle into posi-
tion.
CAUTION: Empty the fluid trap before each
patient or whenever the trap is more than half
full. Failure to empty the trap may allow it to
fill while monitoring a patient and cause the
monitor to stop sampling gas.
Sample Filter Cartridge
Some units have a gas sample filter cartridge
(Figure 2-4) located above the fluid trap. Re-
place this filter cartridge when the advisory
message SAMPLE FILTER BLOCKED appears in
the alarm display area or when the CO, wave-
form response time is degraded.
To remove the cartridge, pull it straight out from
the fluid trap assembly. To replace the cartridge,
place it in position and slide it in until it seats
properly. Check for leaks by occluding the
sample inlet and noting that the unit purges
within five seconds.
Graphic Display
The entire graphic display is covered by a matrix
of infrared targets. A controlis displayed as an
option on a screen. Simply touch the option to
Figure 2-4
Sample Filter Cartridge Replacement
FU LIV OLIO EER EEE AL Lo LIUL LIGUUDDGIV LU CAGIL
pressure on the screen since the infrared beam is
broken when a finger nears the option.
Clock/Calendar Display
The clock/calendar display area, located on the
top left side of the display screen, indicates the
time of day (24-hour clock) in hours and minutes,
the day of the week, the day of the month, the
month of the year, and the year.
To set the clock/calendar:
1. Select MENU from the display screen.
2. Select SETUP from the menu.
3. Select CLOCK SET from the Setup Screen.
Time and date changes can then be made on the
screens displayed. The clock/calendar will main-
tain the current time and date when the power is
switched off.
Note: Some older monitors do not have hardware
to support the clock/calendar. On these monitors,
no clock appears on the main screen and no clock
set option is available.
Alarm Area
The alarm area indicates alarm messages on the
top right side of the display.
Alarm Lights
The alarm lights display either a flashing red light
a flashing yellow light, or a continuous yellow
light depending on the type of alarm. Refer to
“Alarm Types” in Section 2.8.
1.Vac Kote is a registered trademark of the Ball Corporation,
2.Cello-Seal is a registered trademark of Fisher Scientific.
Slide filter cartridge
out to remove it.
Slide collection bottle
down to remove it.

£/ LJESCrIPTION
Alarm Silence
The Alarm Silence function is an infrared touch
function located in the lower left corner of the
monitoring screen. Touching this area mutes the
audio for the indicated length of time.
À new alarm during this mute period resets the
Alarm Silence and allows the audio alarm to
sound. An additional touch during the mute
period will reset the Alarm Silence and allow a
new audio alarm.
À double touch of an inactive alarm, within two
seconds, will cause the ALL MUTE message to
appear next to the alarm silence area, and new
alarms will not activate the audio sound for the
alarm silence interval. A third touch of alarm
silence within two seconds will put the unit into
permanent all mute mode, which mutes all
alarms except LOW INSPIRED O,,.
Another touch resets the alarm mode. The alarm
silence interval can be changed on the Setup
Screen.
Note: If the 78xx ventilator interface is being
used, the mute period is limited to 30 seconds.
The All Mute function is inhibited if the 78xx
ventilator is selected as the RS-232 device on the
Setup Screen. A second touch clears alarm
silence.
2.3 Back Panel Controls and
Connectors
Refer to Figure 2-5.
Voltage Selector
The voltage selector switch allows the operator
to match the available local voltage to the mon-
itor. Voltage selections include 100V, 120V,
220V, and 240V. Once the switch is properly
adjusted no further resetting should be re-
quired.
CAUTION: Make sure the monitor voltage se-
lected agrees with the local voltage available.
n nell -i
i Second touch [Third
First touch
after two touch
after alarm
seconds, or
new alarm, alarm
or alarm time [time
Second touch expires. expires
within two seconds 7
ALL
MUTE 88 | ~
Third touch within
two seconds Fourth
Touch
Alarm Silence Diagram
は DE
Use Only:Hospital Grade
ed Receptacl

Cooling Fan
The cooling fan provides constant air circulation
for the RGM to protect heat sensitive electronic
components.
CAUTION: Do not cover or block the cooling
fan.
Sample Exhaust
Connect the sample exhaust line (1/8" barbed
connector) to a waste gas scavenging system to
properly eliminate the gas sample. If a closed
circuit is required, return the gas sample to the
patient circuit.
Software Module
The RGM's program is stored in the software
module. Contact Ohmeda Customer Service as
listed on the back page to obtain the latest soft-
ware upgrade. For software module replace-
ment, refer to Section 8.4.
External Ground Connection
The external ground connection allows equi-
potential grounding for the monitor when re-
quired.
Power Cord Receptacle
The power cord receptacle allows the monitor
to be connected to the local power system.
CAUTION: Use only the power cord supplied
with the RGM. When replacing the power
cord, use only the power cord specified for this
RGM.
RS-232 Connection
The nine-pin isolated RS-232 connector provides
printer, computer, or 78xx ventilator interface.
O, Sensor Input
The O, sensor input provides the connection for
the O, sensor to the 8-pin modular jack on the
RGM. When inserting the plug, be certain that
the connector plug is fully seated in the jack
and a locking click is heard during insertion. A
slight tug on the cord will ensure that the plug
is fully seated.
Flow Sensor Input
The flow sensor input provides the connection
for the flow sensor to the 6-pin or 8-pin modular
jack on the RGM. When inserting the plug, be
certain that the connector plug is fully seated in
the jack and a locking click is heard during in-
sertion. A slight tug on the cord will ensure that
the plug is fully seated.
Analog Output
The analog output provides an analog signal
proportional to the real-time N,O waveform,
CO, waveform, and other values. The 8-pin DIN
analog output connector provides 0 to 1V full-
scale sensitivity with approximately a 100-ohm
source impedance (see "Connector Pinouts" in
Section F of the Appendix).
CAUTION: Connect only a high input imped-
ance device (10K ohm or higher) to the analog
output connector. Improper loading will upset
the correspondence between the measured
voltage and the intended output voltage.
2.4 Displays
A. CO, Displays
Refer to Figures 2-6 and 2-7.
CO, Digital Display
The previous breaths inspired value is dis-
played to the left of the slash (/) and the maxi-
mum end tidal CO, value over the last three
breaths is displayed to the right of the slash.
The selected unit of measure (%, kPa, or mmHg)
is displayed at the bottom right of the display.
The respiratory rate (RR), derived from CO,
values, is displayed near the top right.
Note: 0-15% is approximately in the 0-110
mmHg range at sea level. The mmHg and kPa
ranges are dependent upon local barometric
pressure.
CO, Waveform and Trend Display
The capnogram is displayed with a scale on the
right side. Seventy minutes of end tidal and
inspired trend at one point every two minutes
are displayed to the left of the capnogram. The
average inspired and expired values for each
two-minute period is displayed in the trend
area.
CO, Trend Display
Eight hours of end tidal trend data at one point
every two minutes are displayed. The available
display ranges are 0-20, 0-40 (default), or 0-80
mmHg; 0-2.5, 0-5, or 0-10%; 0-3, 0-6, or 0-12 kPa.
CO, Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath
trend of inspired and expired values is dis-
played. Tick marks denote five-minute intervals
in this trend.

Lal LPP AB Ae
Waveform Alarm Message
Area Area
Clock/Calendar
Area
Waveform
Title ———>
70-Minute §——»
Waveform
Trend Gas, SpO
Area P 2
| Pressure,
and Volume
Areas
Scale
Area —
Alarm
Alarm Limits Calibrate Wave,
Silence , Selections and Trend and
Area Setup Scale
Menu Selection
Spo,
Respiratory Signal
Rate Indicator
Inspiratory CO, . Exni
. F t
mmHg/kPa/% i. Expiratory Inspiratory OX ory
İ CO mmHg/kPa/% 0,% 2
0,% Display
. 2 Minimum
CO, Display Airway
Pressure
Positive cm H,0
Inspiratory — Mean
Pressure Paw
Pulse k cm HO cm HO
Indicator > na —— Pulse Rate
Spo,
SPO, Display
Tidal Volume
mL/min
: Flow Volume
-— Activity Bar
RA Minute Volume
L/min
TV and MV Display
with 78xx
- Patient Circuit
0,%
Patient Circuit 0,%
Display with 78xx
η να."
Pa MIN Pressure
МАХ Ргеззиге —
Ргеззиге
Plateau
Paw Display
with 78xx
Selected
Agent
.
Expiratory
Inspiratory
~
一
一
Agent
%
Agent % Display
Agent Display
— — N,0%
N,0% Display

Non-agent Analyzer
Non-agent Analyzer
with SpO, Option
Agent Gas
Analyzer Only
Je
|
95.
:
32/12 HALQOTHANE ， an Agent Gas
ο λα.
pump
|
Analyzer
with
SpO,
Note: All display screens show optional flow sensor
Figure 2-7 and optional patient circuit O, sensor installed.
5250 RGM Display Versions

ff LIGSCE ALP LAUER
СО, Alarms
Alarm Message Default Range Type
HIGH Et CO, OFF OFF, 0-15% Emergency
LOW Et CO, OFF OFF, 0-15% Emergency
CO, APNEA 30 sec 20-30 sec Emergency
HIGH Fi CO, OFF OFF, 0-15% Emergency
B. O, Displays
O, Digital Display
Inspired and expired O,are measured from a
single galvanic sensor. A microcomputer con-
trolled switch shunts only inspired gas (based
on the CO, breath detection) to the sensor for
20 seconds, to obtain a stable O, concentration.
The inspired gas is then measured for 15
seconds, and the concentration appears to the
left of the slash. The expired gas is then sup-
plied to the sensor for 20 seconds and meas-
ured for 15 seconds. The expired value is
displayed to the right of the slash. This cycle
repeats continuously as long as breaths are
detected.
O, Trend Display
Eight hours of inspired O, concentration trend
data with one point every two minutes are dis-
played. The available display ranges are 10-70%
(default), or 10-100%.
O, Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath
trend of inspired and expired values appears.
Tick marks denote five-minute intervals in this
trend.
O, Alarms
Alarm Message Default Range Type
LOW INSPIRED O, 18% 18-100% Emergency
HIGH INSPIRED O, OFF OFF, 18-100% Emergency
Note: The LOW INSPIRED O, alarm may not be disabled.
C. SpO, Displays (Optional Feature)
Spo, Digital Display
The SpO, digital value appears in a large font size.
The pulse rate appears above the SpO, value in a
smaller font size. A beating heart icon appears for
each detected pulse. An SpO, beep tone, with a
pitch proportional to the SpO, value, occurs with
each detected pulse.
SpO, Waveform/Trend Display
The plethysmograph appears in a window with a
signal strength indicator on the right side. The
plethysmograph may be either autoscaled (de-
fault) or fixed scale as selected from the Setup
Screen. Seventy minutes of SpO, trend, one point
every two minutes, appears with an SpO, scale on
SpO, Trend Display
Eight hours of 5pO, trend appears with one
point every two minutes. Available display
ranges are 80-100% (default) or 50-100%.
SpO, Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath
trend of the SpO, value is displayed. Tick marks
denote five-minute intervals in this trend.

spO, Alarms
Alarm Message Default Range Type
LOW SpO, 90% OFF, 50-100% Emergency
LOW PULSE RATE OFF OFF, 40-150 bpm Warning
HIGH PULSE RATE OFF OFF, 80-250 bpm Warning
HIGH Spo, OFF OFF, 70-99% Warning
О. NO Displays
N,0 Digital Display
Mean N,O% over a five-second interval.
N,O Trend Display
Eight hours of N,O trend, with one point every
two minutes.
Display ranges are 0-100% (default), or 40-80%.
N,O Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath trend of
inspired and expired values appears. Tick marks denote
five-minute intervals in this trend.
N,O Alarms
Alarm Message Default Range Type
HIGH N,O 80% OFF, 1-99 Emergency
E. Airway Pressure Displays
Airway Pressure Digital Display
The peak pressure over the previous breath is
displayed to the left of the slash. The minimum
pressure over the previous breath is displayed to
the right of the slash. The mean airway pressure
over the previous breath appears in parentheses
beneath the slash.
When interfaced to the 78xx ventilator, the wave-
form can be received by connecting a tee into the
pressure line. Data from the ventilator is MAX
pressure, MIN pressure, and PLAT (pressure
plateau).
Airway Pressure Waveform/Trend Display
The pressure waveform appears with the scale
on the right side. Seventy minutes of trend, one
Airway Pressure Alarms
Note: When interfaced to the 78xx ventilator,
pressure alarm limits cannot be selected.
These alarm limits are set on the ventilator.
Alarm Message Default
HIGH SUSTAINED Paw (15 sec) 30 cm H,0
SUB-ATMOSPHERIC Paw- 15 cm H,0
HIGH Paw 80 cm H,0
LOW SUSTAINED Paw (15 sec) OFF
point every two minutes, appears on the left side.
Note: The airway pressure waveform will not be
in phase with the CO, waveform due to CO,
sample transit time delay.
Airway Pressure Trend Display
Peak pressure is the top value and minimum pres-
sure is the bottom value. Eight hours of trend with
one point every two minutes appears. Available
display ranges are -10 to 20 (default), -25 to 50,
and -40 to 80 cm H,0.
Airway Pressure Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath trend
of peak and minimum pressure appears. Tick
marks denote five minute intervals in this trend.
Range Type
OFF, 10-30 cm H,O Emergency
fixed Emergency
OFF, 1-120 cm H,O Warning
OFF, -10-20 cm H,O Warning

al Bd Cr wD ho BB Be λα
F. Tidal and Minute Volume Displays Minute Volume Trend Display
Tidal and Minute Volume Digital Display Eight hours of minute volume trend, with one
point every two minutes, appears. Available
The tidal volume in milliliters appears to the display ranges are 0-20 L (default) or 0-60 L.
right of TV. The minute volume in liters per
minute appears to the right of MV. Both are
optional features.
Minute Volume Breath-by-Breath Trend Display
If selected on the Setup Screen, a 200-breath
trend of inspired and expired values appears.
Tick marks denote five-minute intervals in this
trend.
Flow Volume Activity Bar Graph
This is a graphical representation of the instan-
taneous flow in the expiratory limb. Full scale is
100 L/min.
Tidal and Minute Volume Alarms
Note: When interfaced to the 78xx ventilator, tidal/minute volume alarm limits cannot be selected.
These alarm limits are set on the ventilator.
Alarm Message Default Range Type
LOW TIDAL VOLUME OFF OFF, 50-2500 ml Emergency
HIGH TIDAL VOLUME OFF OFF, 50-2500 ml Warning
LOW MINUTE VOLUME ] OFF OFF, .2-50.0 L Warning
HIGH MINUTE VOLUME OFF OFF, .2-50.0 L Warning
REVERSE FLOW OFF N/A Warning
Note: The REVERSE FLOW alarm can be enabled on the Setup Screen.
G. Patient Circuit O, Displays
Note: When interfaced to the 78xx ventilator, Circuit O, alarm limits cannot be selected. These
alarm limits are set on the ventilator.
Patient Circuit O, Digital Display
The value shown is the patient circuit O, mean over five-seconds value. This is an optional feature.
Patient Circuit O, Alarms
Alarm Message Default Range Type
LOW CIRCUIT O, 18% 18-99% Emergency
HIGH CIRCUIT O, % OFF OFF, 18-99% Warning
Note: The Low Patient Circuit O, alarm cannot be disabled unless the Patient Circuit O, parameter
is disabled on the Setup Screen. The display value for the Patient Circuit O, is also enabled on the
Setup Screen.
Also Note: Permanent ALL MUTE cannot permanently mute the Low Circuit O, and VENT Low
Circuit O, alarms.
H. Anesthetic Agent Displays
(Optional feature on the 5250 RGM) Anesthetic Agent Digital Display
WARNING: The 5250 RGM does NOT have the
ability to identify anesthetic agents. If the
agent selected on the monitor is not the agent
delivered to the patient circuit, the values will
be
inaccurate. If a mixture of anesthetic agent
is delivered, the monitor may not indicate
accurate values.
WARNING: In the presence of alcohols,
ketones, or other organic hydrocarbon
vapors, the 5250 RGM will not indicate accu-
rate readings of anesthetic agent. This in-
cludes their presence not only in the sample
line or patient circuit, but also ethyl alcohol
The anesthetic agent selected from halothane,
isoflurane, enflurane, or no agent is shown. The
value of the anesthetic agent also appears.
Anesthetic Agent Trend Display
Eight hours of the selected anesthetic agent
trend, with one point every two minutes, ap-
pears. Available display ranges are 0-2% (de-
fault), 0-4%, or 0-6%.
Anesthetic Agent Breath-by-Breath Trend
Display
If selected on the Setup Screen, a 200-breath
trend of inspired and expired values appears.

Anesthetic Agent Alarms
Alarm Message Default Range Type
LOW INSP AGENT OFF OFF, 0-10% Emergency
HIGH INSP AGENT See notes OFF, 0-15% Emergency
LOW EXP AGENT OFF OFF, 0-10% Emergency
HIGH EXP AGENT See notes OFF, 0-15% Emergency
Notes:
1. When an agent is selected, the following high limits are automatically set:
High Insp. High Exp.
Halothane 4.5% 1.7%
Isoflurane
5.5% 3.5%
Enflurane 6.5% 4.2%
2. When the user reviews or changes the agent limits, those limits remain fixed until the unit is
switched off.
3. If NO AGENT is selected, the RGM will alarm if trace agent is detected. The message AGENT
DETECTED appears and SET AGENT will flash.
2.5 Changing the Setup
Refer to Figure 2-8.
1. Select MENU from the display screen.
2. Select SETUP from the menu. The Setup
Screen appears.
3. Select the desired parameter from the left side
of the screen.
4. Select the desired option from the right side of
the screen.
5. Select VIEW ALL to see all parameters and the
current options selected.
6. If preset programmed options are desired,
press DEFAULT.
7. Select REC CAL to set up a strip chart re-
corder connected to the analog output.
8. Select EXIT from the Setup Screen to return to
the display screen.
The following list describes the parameters on
the Setup Screen:
Agent lets you select the current agent type
being delivered to the patient. The menu on the
right shows the agent selection. At powerup, the
No Agent option is selected.
Alarm volume lets you select the volume for
alarms. The higher the number, the louder the
volume.
Note: If the monitor is powered down with the
alarm volume set to one, the alarm volume upon
next powerup will be set to two.
Circuit O, lets you disable the circuit O, alarm
and the display of the circuit O, value.
Display labels shows additional descriptive text
(I/Et, MAX/MIN) for the parameters. After you
know the parameters, you can turn off the extra
labels for a less cluttered screen.
Note: If 78xx is selected for the RS-232 device,
the only available mute period is 30 seconds.
Language lets you select either English, French,
German, Spanish, or Italian for your screens. If
you change your screens to a foreign language
that you don't speak and you want to change
back to English, the translated Language para-
meter is as follows: English, Language; French,
Langue; German, Sprache; Spanish, Idioma; and
Italian, Lingua.
Mute period lets you change the length of time
all of the alarms will be muted. Your options are
30, 60, 90, and 120 seconds.
Note: If 78xx is selected for the RS-232 device,
the only available mute period is 30 seconds.
N,0 display lets you eliminate the display of
nitrous oxide.
Patient type lets you adjust the scale factors for
the flow sensor to the patient type (adult or
pediatric). Use the adult setting for a tidal vol-
ume that is greater than 250 ml/breath.
Pleth scaling (with SpO,) when set to auto,
automatically scales the plethysmogram to full-
scale. When set to non-auto, it fixes the scale at
the current value.