Technical Documentation
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Technical Documentation Cato® Anaesthetic Workstation
Revision 10.0 5170.000 9029636
Because you care
Contents General 1
Symbols and Definitions
3
2
Notes
3
Function Description 1
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Basic unit
7
1.1
Functional diagram ... 8
1.2
Integrated pneumatics ... 10
1.3
Location of the gas connections and valves ... 12
1.4
Non-return valves ... 15
1.5
Alarm valve ... 16
1.6
Control valve (Air) and nitrous oxide shut-off ... 17
1.7
ORC - Oxygen Ratio Controller ... 19
1.8
S-ORC - Sensitive Oxygen Ratio Controller ... 20
1.9
Adjusting and testing specifications ... 24 1.9.1
Mechanical pre-adjustment ... 24
1.9.2
Adjusting the supply pressure ... 24
1.9.3
Leak test ... 24
1.9.4
Adjusting the S-ORC ... 24
1.9.5
Testing the proportional valve ... 25
Power supply unit
27
2.1
Wiring ... 29
2.2
Location of the components ... 30
2.3
Power Supply PCB ... 31
I
Contents Anesthetic ventilator (ventilator)
35
3.1
Piston-cylinder unit ... 41
3.2
Drive unit and fan ... 42
3.3
Compact breathing system ... 44
3.4
Heater (respiratory gas) ... 46
3.5
Pneumatic control - operating states and ventilation modes ... 46 Device de-energized - gas supply switched on ... 46
3.5.2
Manual ventilation / spontaneous breathing is possible ... 48
3.5.3
Device in standby ... 49
3.5.4
IPPV ventilation ... 49
3.5.5
IPPV inspiration ... 50
3.5.6
IPPV expiration ... 51
3.5.7
PEEP ... 52
3.5.8
Excess fresh gas ... 53
3.5.9
Cough ... 53
3.5.10
Man/Spont ... 54
3.5.11
Manual ... 54
3.5.12
Spontaneous ... 55
Safety valve - emergency venting ... 58 3.6.1
Safety valve ... 58
3.6.2
Emergency venting ... 58
3.7
Test ... 59
3.8
Ventilation parameters IPPV, SIMV ... 60
3.9
3.8.1
IPPV ventilation ... 60
3.8.2
SIMV ventilation ... 62
Text messages ... 64
3.10 Compliance correction ... 67 3.11 Electronic control ... 70 3.12 Electronic components ...72 3.13 Removing DIVAN ... 76
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3.6
3.5.1
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Contents 3.14 Folding the motherboard down ... 80 4
PM 8050 cd
85
4.1
Alarm messages of the DIVAN to the PM 8050 cd ... 91
4.2
Configuration menu ... 93
4.3
Operating conditions of the system ... 96
4.4
Optical measuring system ... 97
4.5
Power supply unit ... 99
4.6
Printed circuit boards ... 99
4.7
Removal ... 101
4.8
Error messages ... 102
5
Wiring of PM8050 to Vitara and AR8060
103
6
A-cone
105
7
6.1
General ... 105
6.2
Assemblies ... 105
6.3
Function ... 106
Cato Edition
107
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K5170000IECIVZ.fm 15.08.06
Maintenance Procedures 1
Servicing intervals
113
2
Replacing consumable items
115
2.1
O2 sensor ... 115
2.2
Cooling air filter ... 116
2.3
NiCd rechargeable battery in the lung ventilator ... 116
2.4
NiCd rechargeable battery in the PM 8050 cd ... 118
2.5
Pressure measuring line with filter ... 122
2.6
Replacing the rolling seal on the patient side ... 122
III
Contents Schematics and Diagrams 1
System components
127
2
Communication structure
128
3
Electrical connections
129
4
Pneumatic connections
130
5
Tubing diagram with S-ORC
131
6
Tubing diagram with ORC (older units)
132
7
Cato Edition tubing diagram
133
Annex
IV
K5170000IECIVZ.fm 15.08.06
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Test List
General
1
Cato 1
General Symbols and Definitions
WARNING A WARNING statement provides important information about a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION A CAUTION statement provides important information about a potentially hazardous situation which, if not avoided, may result in minor or moderate injury to the user or patient or in damage to the equipment or other property.
NOTE A NOTE provides additional information intended to avoid inconvenience during operation or servicing of the equipment.
Definitions according to German standard DIN 31051:
2
Notes
Inspection
= examination of actual condition
Maintenance
= measures to maintain specified condition
Repair
= measures to restore specified condition
Servicing
= inspection, maintenance, and repair
This Technical Documentation conforms to the IEC 60601-1 standard. Read each step in every procedure thoroughly before beginning any test. Always use the proper tools and specified test equipment. If you deviate from the instructions and/or recommendations in this Technical Documentation, the equipment may operate improperly or unsafely, or the equipment could be damaged.
The maintenance procedures described in this Technical Documentation may be performed by qualified service personnel only. These maintenance procedures do not replace inspections and servicing by the manufacturer. The information in this Technical Documentation is confidential and may not be disclosed to third parties without the prior written consent of the manufacturer. This Technical Documentation is for the purpose of information only. Product descriptions found in this Technical Documentation are in no way a substitute for reading and studying the Instructions for Use/Operating Manual enclosed with the product at the time of delivery.
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Dräger recommends that only authentic Dräger repair parts be used for maintenance. Otherwise the correct functioning of the device maybe compromised.
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General
Cato
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NOTE Unless otherwise stated, reference is made to laws, regulations or standards (as amended) applicable in the Federal Republic of Germany for equipment used or serviced in Germany. Users or technicians in all other countries must verify compliance with local laws or applicable international standards.
Function Description
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Cato 1
Function description Basic unit
Configuration/variants The Cato is manufactured a a ceiling-mounted unit and as a mobile unit. Features of the ceiling-mounted unit: •
additional crossarm with ceiling mount and optocouplers
•
membrane keypad for control integrated in the handles of Cato
•
Optocoupler PCB (in the crossbeam above the PM 8050 CD)
It is designed as a 3-gas unit (O2, N2O, and Air) and comes with ORC low flow and low-flow flowmeters. Cylinder supply An optional high-pressure kit can be retrofitted. This kit consists of two 11-L gas cylinders (O2 and N2O). The high pressure regulators (200 bar/5 bar for O2 and 60 bar/5 bar for N2O) are located on the gas cylinders. The cylinder pressure can be read on the pressure gauges of the respective pressure regulator. The connection to the unit is made via high-pressure coiled tubes. O2 and N2O are supplied to the mechanical gas flow control through non-return valves. Central supply O2, N2O, and Air (2.7 to 5.5 bar) are supplied via three ISO connectors located on the back of the unit. The pipeline supply pressures are indicated on pressure gauges located above the flowmeter block. Mechanical gas flow control Additional pressure regulators decrease the O2 and N2O pressures to 3 bar and the Air pressure to 1.5 bar, and the gases are delivered to the flowmeter block for metering, depending on the operating mode. Downstream of the flowmeter block the gas mixture flows through the Vapor anesthetic vaporizer. After enrichment with Halothane, Enflurane, Isoflurane, Sevoflurane, or Desflurane, the fresh gas is available at the fresh-gas outlet. Safety devices
•
Oxygen ratio controller with bypass (0.8 L/min)
•
N2O shut-off
•
Alarm valve
•
Selector switch for Divan gas supply and secretion suction system in the event of Air failure
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Cato is always equipped with the following safety devices:
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Function description
Figure 1
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Functional diagram of the Cato
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Functional diagram
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1.1
Cato
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Cato
Figure 2
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Functional diagram of the Cato with S-ORC
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Function description 1.2
Integrated pneumatics
Cato The integrated pneumatics replaces the conventional mechanical gas flow control. It combines the functions of the following individual components: •
Non-return valves
•
Nitrous oxide shut-off
•
Control valve
•
Alarm valve
•
Mean-pressure regulator
Selector switch for Divan gas supply and secretion suction system in the event of Air failure; threshold value switch for selector switch Function
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An aluminum block is divided into three levels and each level is assigned a gas (O2, N2O, Air). The pneumatic connection of the individual elements is ensured by channels with the block. This methods saves approx. 50% of plug-in connections compared to the mechanical gas flow control. The valves are designed as compact components. Short switching paths and the lack of diaphragms reduce the rate of wear and increase the reliability and life of the assembly.
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Cato
Figure 3
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Integrated pneumatics
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Function description 1.3
Location of the gas connections and valves
Cato The numbers and letters specified in the gas flow diagrams and in the following illustrations are engraved into the integrated pneumatics.
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Gas connections 1
Figure 5
Gas connections 2
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Figure 4
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NOTE The valve inserts configuration is shown in the following illustrations.
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Cato
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Figure 6 Top view
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Cato
Valve elements 1
Figure 8
Valve elements 2 Copyright reserved.
Figure 7
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Function description
Cato 1.4
Function description Non-return valves
The non-return valves prevent any gas exchange between the cylinders and the pipeline gas supply as well as a loss of gas when the connections are open.
Non-return valves
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Figure 9
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Function description 1.5
Alarm valve
Cato The alarm valve in an integral part of the O2 failure alarm. In the event of an oxygen failure the alarm whistle in the O2 failure alarm is activated.
Figure 10 Alarm valve
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When the gas supply is open, the container is filled with gas through the nonreturn valve. The oxygen pressure present keeps the alarm valve closed. The alarm valve opens when the oxygen pressure falls below 1.7 bar. The oxygen stored in the container flows through the injector to the whistle. The injector draws ambient air thus prolonging the alarm time. The audible alarm sounds for approx. 7 seconds.
Cato 1.6
Function description Control valve (Air) and nitrous oxide shut-off
O2 and N2O are supplied at a pressure of 3 bar. Air pressure is reduced to 1.5 bar. The 3-bar pressure is necessary for the downstream ORC. There are two possible operating modes: •
Anesthesia operation
•
Operation during the final phase of anesthesia or in the recovery room
Anesthesia operation Gas selector set to N2O
Figure 11
Gas selector set to N2O
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The control valve and the nitrous oxide shut-off are supplied with pressure via the oxygen line. The control valve closes, Air cannot be supplied. The nitrousoxide shut-off is opened by the pressure present. O2 and N2O are available at the flow control valves on the flowmeter block. Apart from functioning as a switchover valve, the nitrous-oxide shut-off has an additional function. If the oxygen supply fails or if the operating pressure falls below the minimum level of approx. 2 bar, the spring closes the valve and interrupts the nitrous-oxide supply.
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