Ohmeda Ohio Care Plus User manual

Ohio®Care Plus®Incubator
and Ohio®Care Plus®
Access Incubator
Operation and Maintenance Manual

ii ii
6600-0239-000 100
User Responsibility
This Product will perform in conformity with the description thereof contained in this
operating manual and accompanying labels and/or inserts, when assembled, oper-
ated, 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 recom-
mends that a telephone 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 re-
paired 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
approval of Ohmeda’s Quality Assurance Department. The user of this Product shall
have the sole responsibility for any malfunction which results from improper use, faulty
maintenance, improper repair, damage, or alteration by anyone other than Ohmeda.
Important This manual is subject to periodic review. Customers are cautioned to obtain
and consult the latest manual revision. Suggestions are also invited from customers
for consideration by Ohmeda in connection with these periodic reviews. Customers
may contact product service at 1-800-345-2755 or by writing to Ohmeda at P.O.
Box 7550, Madison, WI 53707.
CAUTION U.S. Federal and Canadian law restrict this device to sale by or on the order of
a licensed medical practitioner.

Table of Contents
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6600-0239-000 100
Table of Contents
General Precautions
Warnings .................................................................................................................................................................. iv
Cautions ...................................................................................................................................................................iv
1/Introduction
Introducing the Ohio®Care Plus®Incubator .............................................................................................1-1
The Elevating Base accessory.......................................................................................................................... 1-2
Adding a rail system or storage module.....................................................................................................1-2
How to use this manual ....................................................................................................................................1-3
2/Getting Started
Unpacking ............................................................................................................................................................ 2-1
Mounting the Care Plus on the Elevating Base ...................................................................................... 2-2
Mounting the Care Plus on the cabinet ....................................................................................................2-3
Mounting the rail system on the cabinet ................................................................................................. 2-4
Mounting the basic rails ...................................................................................................................... 2-4
Mounting the overhead shelf ...........................................................................................................2-5
3/General Information
Operating modes .............................................................................................................................................. 3-1
The air control (manual) mode .........................................................................................................3-1
The patient control (servo) mode ....................................................................................................3-2
Controls and displays ....................................................................................................................................... 3-4
Alarms .................................................................................................................................................................... 3-6
Cable connections and mechanical controls ........................................................................................3-10
4/Preoperative Checkout Procedure
Mechanical checks ............................................................................................................................................4-1
Accessory checks ...............................................................................................................................................4-3
Controller checks ...............................................................................................................................................4-3
Operational checks ........................................................................................................................................... 4-6
Elevating Base and Stationary Pedestal Checkout Procedure ............................................................ 4-6
Operating the Elevating Base ......................................................................................................................... 4-8
5/Using the Incubator
Basic operating procedure ............................................................................................................................. 5-2
Responding to alarms ......................................................................................................................................5-5
Air circulation alarm .............................................................................................................................. 5-6
Control temperature alarm ................................................................................................................ 5-6
High air temperature alarm ...............................................................................................................5-6
Patient temperature alarm ................................................................................................................. 5-7
Probe failure alarm ................................................................................................................................ 5-7
Power failure alarm ............................................................................................................................... 5-8
System failure alarm .............................................................................................................................5-8
Additional operating procedures ................................................................................................................ 5-8
Accessing the patient ...........................................................................................................................5-8

Table of Contents
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6600-0239-000 100
Raising and lowering the hood ......................................................................................................5-10
Trendelenburg and Reverse Trendelenburg positioning – tilt handle models...............5-11
Trendelenburg and Reverse Trendelenburg positioning –
continuous tilt models .................................................................................................................5-12
Administering oxygen .......................................................................................................................5-12
Using the humidier ...........................................................................................................................5-14
ThermaLink Option .............................................................................................................................5-15
Using the Serial Data interface .......................................................................................................5-16
Using the Nurse Call System interface .........................................................................................5-16
6/Maintaining the Incubator
Cleaning schedule ............................................................................................................................................6-1
Disassembling the incubator for a complete cleaning ........................................................................6-2
Cleaning and disinfecting individual components ...............................................................................6-5
Humidier .................................................................................................................................................6-6
Patient Probe ...........................................................................................................................................6-6
Controller assembly ..............................................................................................................................6-7
Portholes ...................................................................................................................................................6-8
Compartment Temperature Probe....................................................................................................6-8
Other Clear plastic parts ......................................................................................................................6-8
Lower unit (mattress, mattress tray, base platform cover, etc.).............................................. 6-8
Oxygen inlet ............................................................................................................................................. 6-8
Cabinet ......................................................................................................................................................6-8
7/Service Procedures
Repair policy ........................................................................................................................................................ 7-1
Maintenance schedule...................................................................................................................................... 7-1
Operator maintenance ..........................................................................................................................7-1
Service maintenance..............................................................................................................................7-2
Troubleshooting incubator problems .......................................................................................................7-2
8/Maintenance Parts and Accessories
Base platform and cover assembly ............................................................................................................. 8-1
Accessories ..........................................................................................................................................................8-2
Appendix
Care Plus specications ...................................................................................................................................A-1
Electrical specications .......................................................................................................................A-1
Performance specications ................................................................................................................A-2
Safety specications .............................................................................................................................A-4
Environmental specications ............................................................................................................A-4
Electromagnetic Compatibility (EMC) Specications ...............................................................A-4
Mechanical specications ...................................................................................................................A-5
Optional Elevating Base pecications .........................................................................................................A-5
ThermaLink Option Specications ..............................................................................................................A-6
A. Hewlett Packard CMS Monitor (Vuelink) ...........................................................................A-6
B. SpaceLabs Monitor (Flexport)................................................................................................A-6
C. RS-232 Serial Data .....................................................................................................................A-6
D. Nurse Call .....................................................................................................................................A-9
Additional Safety Information ................................................................................................................... A-11
Glossary ............................................................................................................................................................. A-12
Warranty

Table of Contents
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6600-0239-000 100
Warnings
Before using the incubator, read through this entire manual. As with all medical
equipment, attempting to use this device without a thorough understanding of its
operation may result in patient or user injury. This device should only be operated by
personnel trained in its operation under the direction of qualied medical personnel
familiar with the risks and benets of this type of device. Additional precautions
specic to certain procedures are found in the text of this manual.
Complete the“Pre-operative Checkout Procedures”section of this manual before
putting the unit into operation. If the incubator fails any portion of the checkout
procedure it must be removed from use and repaired.
Do not use the Care Plus or the Elevating Base in the presence of ammable
anesthetics; an explosion hazard exists under these conditions.
Always disconnect the power before performing service or maintenance procedures
detailed in this manual. Apply power only if you are specically instructed to do so as
part of the procedure.
Thoroughly air dry the incubator after cleaning it with ammable agents. Small
amounts of ammable agents, such as ether, alcohol or similar cleaning solvents left
in the incubator can cause a re.
Cautions
Only competent individuals trained in the repair of this equipment should attempt to
service it as detailed in the Service Manual (Stock Number 6600-0017-000).
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.
General Precautions

Table of Contents
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6600-0239-000 100
Notes

1-1
1/Introduction
1-1
6600-0239-000 100
1/Introduction
In this section
Introducing the Ohio®Care Plus®Incubator ..............................................................................................1-1
The Elevating Base accessory.......................................................................................................................... 1-2
Adding a rail system or storage module.....................................................................................................1-2
How to use this manual ....................................................................................................................................1-3
Introducing the Ohio Care Plus Incubator
Thank you for selecting the Ohio Care Plus Incubator. The Care Plus adapts to your
patient’s needs with: servo and manual operating modes; a built-in passive humidier;
an oxygen inlet; removable inner walls; a model with three or six degree bed positions
or a continous tilt model with bed positions from zero to twelve degrees. The Care Plus
Access Incubator provides a larger hood for greater patient access and two additional
tubing access ports.
The Optional ThermaLink feature simplies charting and monitoring. RS-232 serial
data is provided for use with customized research software or compatible vital signs
monitors. The Nurse Call connection lets you integrate the Care Plus into your current
or future remote alarm system.
From its comprehensive series of alarms and quiet operation, to unique oval portholes
for greater lateral access, the Care Plus oers both security and convenience. Its famil-
iar styling integrates into the existing nursery environment with a rail mounting system
that accommodates most Ohmeda rail mount accessories. Options, such as single
or double walls, an adjustable height stand with or without storage units and a servo-
controlled humidier, let you select the system best suited to your needs.
Ohio®Care Plus® Incubator is a registered trademark of Ohmeda.
Figure 1-1
The Ohio Care Plus Incubator
CI.07.038

1-1
1/Introduction
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6600-0239-000 100
Care Plus technology
The Care Plus combines microprocessor technology, a unique hood design with front
to back air ow, and an integral humidier to stabilize patient temperature:
• Themicroprocessorrespondsimmediatelytotemperaturechanges,minimizingthe
temperature uctuations of older, analog incubators.
• Heatedaircirculatedalongthehoodwall,orbetweentheoptionaldoublewalled
hood, warms the surfaces surrounding the infant, reducing radiant heat loss.
• Limitingairmovementaroundtheinfantreducesconvectiveandevaporativeheat
loss. Humidifying the air further reduces evaporative heat loss.
WARNING Before using the Ohio Care Plus Incubator, read through this entire manual.
As with all medical equipment, attempting to use this device without a thor-
ough understanding of its operation may result in patient or user injury.
The Elevating Base accessory
The Elevating Base lets you adjust the Care Plus Incubator to the height that is most
comfortable for you. The mattress can be as low as 85 cm (34 inches) or as high as
107 cm (42 inches) above the ground. The foot pedal controls leave your hands free to
care for the patient.
CI.07.003
Figure 1-2
Dierent elevations
Adding a rail system or storage module
Optional storage units and rail systems provide convenient storage for the Elevating
Base and keep accessories nearby. Rail systems are also available for cabinet mounted
incubators.
Each of the Care Plus congurations accommodates Ohmeda’s dove-tail rail systems.
Rail systems expand with your needs to support a full range of patient care accessories.

1-1
1/Introduction
1-3
6600-0239-000 100
How to use this manual
This manual serves both as a guide to learn how to operate the Care Plus and as refer-
ence once you are familiar with the Care Plus.
If you are setting up the system for the rst time, read all the sections starting with
Chapter 2,“Getting Started,” which contains unpacking, assembly, and accessory
mounting information.
If the Care Plus is already in place and this is the rst time you have used it, start with
Chapter 3,“General Information.”
If you have used the Care Plus previously, complete the step-by-step checkout proce-
dure in Chapter 4, which is required before using the incubator. Then turn to Chapter 5
“Using the Incubator.”
This manual includes instructions for a new continuous bed tilt model, so even if you
have used the Care Plus before, you should acquaint yourself with new operation and
check procedures concerning this new model.
Before cleaning the Care Plus, read Chapter 6,“Maintaining the Incubator,” carefully.
In addition to explaining how to disassemble and clean the incubator, it contains spe-
cic cautions about cleaning methods that can damage incubator components.
Chapter 7,“Service procedures,” helps you solve problems that may occur with the
incubator. For example, what do you do if the temperature switches (Mand ?) don’t
work? (Press the Enable switch to activate them.)
Chapter 8,“Maintenance Parts and Accessories,” tells you how to order replacement
parts and accessories.
The Appendix contains additional reference material: incubator specications and a
glossary of the terms used in this manual.
What warnings and cautions mean
No matter what part of this manual you are using, you should always be familiar with
the cautions and warnings that appear throughout this manual. Warnings
alert you to conditions and actions that can cause injury. Cautions point out
conditions or actions that may damage the incubator.
Please also take a moment to review the User Responsibility Statement on the inside
of the front cover; it describes what is expected of you to maintain the Care Plus Incu-
bator. Also read the Warranty on the back cover; it outlines Ohmeda’s responsibility in
case of a functional defect.
Symbols used in this manual
An attention symbol in the left hand column alerts you to a warning or a caution in the
text. The attention symbol looks like this:
Just as on the controller panel, we use arrow heads to represent the temperature
switches:
MIncrease the control temperature
?Decrease the control temperature

1-1
1/Introduction
1-4
6600-0239-000 100
Notes

2-1
2/Getting Started
2-1
6600-0239-000 100
2/Getting Started
The Care Plus mounts on several dierent devices, the cabinet, elevating or
non-elevating Base. Follow the installation instructions supplied with your system.
WARNINGS Safely mounting or dismounting the Care Plus Incubator or the Elevating
Base rail system requires two people. Remove the controller unit before
mounting or dismounting the incubator.
Do not place the incubator in direct light. Exposing the infant or the incubator
to direct radiation from the sun or incandescent lighting may cause the infant
to overheat.
Items not covered in this chapter
If your system uses any accessories or external monitoring devices (phototherapy
light, blender, etc.), follow the mounting instructions in the operation and
maintenance manual for the device.
In this section
Unpacking..............................................................................................................................................................2-1
Mounting the Care Plus on the Elevating Base ........................................................................................2-2
Mounting the Care Plus on the cabinet .....................................................................................................2-3
Mounting the rail system on the cabinet ................................................................................................... 2-4
Mounting the basic rails........................................................................................................................ 2-4
Mounting the overhead shelf..............................................................................................................2-5
Unpacking
Inspect the Care Plus for any signs of shipping damage immediately after unpacking.
If the Care Plus or its accessories appear to have been damaged in shipment, le a
damage claim with the shipping carrier within 15 days of receipt. Keep all packaging
materials until the claim is resolved.
Also check the packing slip against the shipment to verify that all accessory devices
are present.
If you are not mounting the incubator on a Care Plus cabinet, elevating or non-elevating
base, to install the controller perform only steps 4 and 5 of either Mounting the Care
Plus on the Elevating Base or Mounting the Care Plus on the cabinet.

2-2
2/Getting Started
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6600-0239-000 100
Mounting the Care Plus on the Elevating or Non-elevating Base
WARNING Safely mounting or dismounting the Care Plus Incubator or the Elevating Base
rail system requires two people.
1. Verify that O-rings or foam gaskets are installed in the depression around each of
the incubator mounting holes in the incubator platform.
2. Lift the Care Plus Incubator onto the Base. Make sure that the front of the Elevating
Base (foot pedals) faces the same direction as the front of the incubator. Refer to
Figure 2-1.
3. Install the four mounting screws.
WARNING If mounting hardware is not securely fastened, the incubator could tip o the
stand.
CAUTION When handling the controller, avoid bumping the fan or the heater. If these items are
knocked out of alignment, the fan can grate against the heater or the base.
4. Install the controller. Lift the levers on the controller and slide it into the incubator as
shown in Figure 2-1. Push the levers down to lock the controller in place.
5. Refer to section 4 in this manual to perform preoperative checkout procedures.
Figure 2-1
Mounting the Care Plus Incubator
Incubator
Platform
Controller
Lever
(Lift to Remove
Controller)
Foot Pedal
Controls
Mounting
Screw
CI.07.049

2-3
2/Getting Started
2-3
6600-0239-000 100
Mounting the Care Plus on the cabinet
WARNING: Safely mounting or dismounting the Care Plus Incubator or the Elevating
Base rail system requires two people.
1. Verify that O-rings or foam gaskets are installed in the depression around each of
the incubator mounting holes in the cabinet top.
2. Lift the Care Plus Incubator onto the cabinet. Make sure that the cabinet doors
face the same direction as the incubator’s front door. Refer to Figure 2-2.
3. Install the four mounting knobs.
WARNING If mounting hardware is not securely fastened, the incubator could tip o the
stand.
CAUTION When handling the controller, avoid bumping the fan or the heater. If these items
are knocked out of alignment, the fan can grate against the heater or the base.
4. Install the controller. Lift the levers on the controller and slide it into the incubator
as shown in Figure 2-2. Push the levers down to lock the controller in place.
5. Refer to section 4 in this manual to perform preoperative checkout procedures.
Figure 2-2
Mounting the Care Plus Incubator
Mounting
Knob
CI.02.189
Controller
Controller
Lever

2-4
2/Getting Started
2-4
6600-0239-000 100
Mounting the rail system on the cabinet
Note: This section applies to cabinets with threaded mounting holes. If your cabinet
does not have four threaded mounting holes on each corner, refer to the rail mounting
instructions in the Service Manual.
CAUTION The maximum load on cabinet rail systems must not exceed 23 kg (50 lbs). This
includes the weight of items placed on rail mount or overhead shelves.
Mounting the basic rails
The short rails, long rails, single rails, and the overhead shelf use the same basic as-
sembly procedure.
CI.02.188
Screw
Lockwasher
Tape
Threaded
Mounting
Hole
Stiener
Plate
Tape
Dovetail
Rail
Figure 2-3
Mounting the basic rail system
Note: The rail kits include extra hardware to adapt them for the earlier cabinets. You
will have eight, rectangular plates, 16 internal tooth lockwashers, and 16, #10 x 5/8
inch truss head screws left over.
1. Make sure that you have the correct rail. The rails are not symmetrical. Markings
on each rail tell you which side of the cabinet to put it on (Right Front/Left Rear or
Left Front/Right Rear).

2-5
2/Getting Started
2-5
6600-0239-000 100
2. Remove the four screws and lockwashers from the corner of the cabinet where
you intend to mount the rail.
3. Align a stiener plate with the threaded mounting holes on the cabinet. Use the
tape on the stiener to hold it in place. Refer to Figure 2-3.
4. Place the rail over the stiener plate and align the holes in the rail with those in the
stiener plate. Use the tape on the stiener to hold the rail in place.
CAUTION The tape on the stiener plate will not support any weight. The only reason for the
tape is to help you line the parts up.
5. Put split ring lockwashers on four, #10 x 3/4 inch socket head screws, and install
the screws from the outside of the cabinet.
Note: Verify that all four screws are tight before mounting any accessories on the
rail.
6. Repeat steps 1 through 5 for the second rail, if applicable.
Mounting the overhead shelf
1. Mount the basic rails.
2. Align the holes in the shelf with the holes at the top of the rails (four on each rail).
Secure the shelf with eight, 1/4 inch screws and lockwashers.
Figure 2-4
Mounting the overhead shelf
Lockwasher
Overhead
Shelf
Screw
Endcap
CI.02.040

2-6
2/Getting Started
2-6
6600-0239-000 100
Notes

3-1
3/General Information
3-1
6600-0239-000 100
3/General Information
In this section
Operating modes ................................................................................................................................................ 3-1
The air control (manual) mode ...........................................................................................................3-1
The patient control (servo) mode......................................................................................................3-2
Controls and displays......................................................................................................................................... 3-4
Alarms......................................................................................................................................................................3-6
Cable connections and mechanical controls..........................................................................................3-10
Operating modes
The Care Plus has two operating modes: the air control (or manual) mode, which
adjusts heater output to achieve a target air temperature; and the patient control
(or servo) mode, which adjusts the incubator temperature to achieve a target infant
skin temperature. In both modes, the target temperature appears in the Control
Temperature display on the front of the controller and can be adjusted using the
temperature switches (?and M).
To distinguish between control temperatures in the dierent modes, this manual uses
the term “air control temperature” for the control temperature in the air control mode
and the term “patient control temperature” for the control temperature in the patient
control mode.
Note: This section briey mentions displays, controls, and alarms that play a
signicant role in the air control and patient control modes. For further information,
refer to the appropriate section “Controls and displays” or“Alarms.”
The air control (manual) mode
The air control mode compares the air temperature to the air control temperature to
determine if the heater should be switched on or o. If the air temperature is too high,
the heater switches o. If the air temperature is too low, the heater switches on.
Air control temperature
The air control mode lets you enter air control range temperatures from 20 to 37°C
(68.0 to 98.6°F) using the temperature switches (?and M). Pressing the Override
switch when the air control temperature is 37°C (98.6°F) lets you increase the air
control temperature to 39.0°C (102.2°F).
Control temperature alarm
The control temperature alarm triggers if the air temperature exceeds a normal range
air control temperature by more than 1.5°C (2.7°F) or if the air temperature falls more
than 3.0°C (5.4°F) below the air control temperature. For air control temperatures
above 37°C, the control temperature alarm triggers if the air temperature exceeds the
air control temperature by more than 1.0°C (1.8°F).
To avoid unnecessary alarms, the control temperature alarm does not trigger during
the rst 30 minutes after power is switched on and for 15 minutes after you change
the air control temperature or enter the air control mode from the patient control
mode. During this period, normal incubator alarm routines verify proper operation and
switch o the heater if the air temperature exceeds certain default safety limits: 38°C
(100.4°F) for control temperatures below 37°C (98.6°F) and 40°C (104.0°F) for control
temperatures above 37°C.

3-2
3/General Information
3-2
6600-0239-000 100
Patient probe
In the air control mode, the patient probe has no aect on incubator operation;
connecting the probe simply displays the patient temperature for your information.
The patient control (servo) mode
In the patient control mode, the control temperature (patient control temperature)
corresponds to the desired patient skin temperature. To reach an incubator
temperature that will maintain the desired skin temperature the incubator control
system loops through the program shown in Figure 3-1. This program compares the
patient control temperature setting to the actual patient temperature and raises or
lowers the incubator temperature depending on whether the infant is hot or cold. The
incubator temperature that maintains the desired skin temperature is referred to as the
DET (Desired Environmental Temperature). The maximum DET that the incubator will
maintain is 39.0°C (102.2°F).
You can reduce the time required to reach the DET by preheating the incubator in
the air control mode before entering the patient control mode. The closer the air
temperature gets to the actual air temperature required to maintain the desired infant
skin
temperature, the sooner the incubator will stabilize the infant’s temperature in the
patient control mode. When you switch to the patient control mode, the previous air
control temperature becomes the initial DET. The incubator automatically adjusts the
DET using the three stage patient control mode program, shown in Figure 3-1.
The rst stage of the loop checks to make sure that the patient probe is reporting a
reasonable patient temperature before making any adjustments. If the patient
temperature is less than 30°C (86.0°F) or above 42°C (107.6°F), the incubator assumes
that the patient probe has detached from the infant, the patient temperature alarm
triggers, the heater shuts o, and the DET remains unchanged.
The second stage of the loop calculates the PTG (Patient Temperature Gradient), the
dierence between the actual patient temperature and the selected patient control
temperature, to determine if the infant is hot or cold. If the infant is too cold (PTG <
-0.5°C), the heater switches On. If the infant is too hot (PTG > 0.5°C), the heater shuts
down. The patient temperature continues to be checked every three seconds.
The third stage calculates the change in the patient temperature over the previous ten
minute period. If the infant temperature diers from the patient control temperature
setting by 0.2°C or more, and this dierence has not decreased by at least 0.2°C
during the last ten minute period, the DET will be adjusted. To prevent large incubator
temperature swings and to allow time for the patient to respond to changes in the
incubator temperature, the magnitude of the change in the DET depends on the PTG.
Patient control temperature range
The patient control mode lets you enter air control temperatures from 35.0 to 37.0°C
(95.0 to 98.6°F) using the temperature switches (?and M). An internal
adjustment lets you increase the patient control temperature to 37.5°C (99.5°F).
Patient temperature alarm
Patient temperature alarm monitoring runs concurrently with the control loop. A patient
temperature alarm triggers if the patient temperature diers from the patient control
temperature by more than 1.0°C (1.8°F), or 0.5°C (0.9°F) with an internal adjustment.
Additional alarm routines verify proper operation and switch o the heater if the air
temperature exceeds 40.0°C (104.0°F).

3-3
3/General Information
3-3
6600-0239-000 100
Start
Is the PT
<30°C?
Is the PT
>42°C?
Is the PTG
<-0.5°C?
Is the PTG >
0.5°C?
Ye s
Infant is
hot
Supply no heat
Ye s
Infant is
cold
Ye s
Assume probe
is dislodged
1) Switch heater off
2) Activate alarm
3) Keep DET constant
Ye s
Assume probe
is dislodged
No
No
No
Have 10 min
passed?
No
Supply
maximum heat
No
Repeat first stage
No
Infant is
cold
Ye s
Infant is
hot
Is the
PTG³0°C?
Is the DPT£
-0.2°C?
Is the DPT³
0.2°C?
DET change
= 0
Ye sYe s
DET
PTG Change
-0.5°C 0.3°C
-0.4°C 0.3°C
-0.3°C 0.2°C
-0.2°C 0.1°C
-0.1°C 0.0°C
-0.0°C 0.0°C
DE
PTG Chang
0.5°C -0.3°C
0.4°C -0.3°C
0.3°C -0.2°C
0.2°C -0.1°C
0.1°C -0.0°C
0.0°C -0.0°C
No No
Calculate new DET
New DET = Old DET + Change
PT = Patient Temperature
PCT = Patient Control Temperat
PTG = PT-PCT
DPT = Current PT - PT 10 min.
previous
Ye s
Start
third
stage
Stage 1
Stage 2
Figure 3-1
Patient control mode logic diagram
CI.02.068
Stage 3