Stephan GmbH
Anaesthesia Systems
Stephan Artec, Portec Anaesthesia Apparatus Service Instructions Ver V1.2 April 1999
Service Instructions
64 Pages
Preview
Page 1
Artec / Portec Anaesthesia Apparatus
STE PHA N
ANESTHES IE GME 2
02
N 20
21 0 OFF 2
12 11
12 10 8
10 6 9 4
8
2 7 6
1
5 4 0,2 3 O2
2
0 2
N2 O
N20
Service Instructions
Preface
Service Instruction
Please carefully read each step of the procedure that is to be carried out before beginning the servicing of the unit. Always use the correct tools and the indicated measuring instruments. Any non-compliance with the instructions and/or recommendation found in this technical documentation can lead to a malfunctioning of the equipment or damage to it. Use only original replacement parts as supplied by F. STEPHAN GMBH, and that are listed in the Replacement Parts List.
This technical documentation is not to be used in place of the operating instructions. Each operation and handling of the equipment requires exact knowledge and observance of the operating instructions. This equipment is only to be used for the stipulated application.
F. Stephan GmbH - Medizintechnik Kirchstrasse 19 56412 Gackenbach, Germany Subject to technical changes.
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Stand: Status:
April 1999
Version:
V1.2
SA-103-0499V1.2-STJ-GB
© F. Stephan GmbH
®
Table of Contents
Table of Contents Table of Contents ...3 1
2
3
General Information...7 1.1
Equipment designation and manufacturer ...7
1.2
Technical safety inspections ...7
1.3
Maintenance...7
1.4
Warranty ...8
Connections on part of the supply system ...9 2.1
Check of the plug-in gas couplings O2, N2O, AIR for:...9
2.2
Check of the gas connection tubes O2, N2O, AIR, for:...9
2.3
Check of the screw joints of the connecting threads O2, N2O, AIR for:...9
2.4
Check of the female connecting threads O2, N2O, AIR for: ..10
Description of Design and Performance ...11 3.1
4
Gas-mixing-unit 2 and 3 (GME 2/GME 3)...11 3.1.1
O2-Flush ...12
3.1.2
AIR / N2O-Change-Over ...12
3.1.3
Nitrous Oxide Blocking...13
Vaporizer, Vaporizer holding device ...15 4.1
Vaporizer ...15
4.2
Vaporizer holding device...15
5
Cylinder Supply Unit ...17
6
Circle System ...19 6.1
7
Design and Description of Performance...19 6.1.1
CL (closed)...20
6.1.2
Pressure Range from 5mbar to 50mbar ...20
6.1.3
Spontaneous Respiration ...20
6.1.4
VOL (volume-controlled ventilation) ...20
6.1.5
Circle System ...21
Performance Test ...23 7.1
Execution of the Test ...23
7.2
O2-Flush...24
7.3
Air / N2O-Change Over (Basic setting) ...24 7.3.1
© F. Stephan GmbH
Execution of the Test...24
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Table of Contents 7.4
7.5
7.6
7.7
8
9
10
Check of types of gas and test of the safety devices...25 7.4.1
Execution of the Test...25
7.4.2
Proportioning Valves...25
Tightness of the Circle System ...26 7.5.1
Basic setting ...26
7.5.2
Execution of the Test...27
Test of the pressure-regulating valve...27 7.6.1
Basic setting ...28
7.6.2
Execution of the Test...28
Test of inspiration-and expiration valve ...29 7.7.1
Basic setting ...29
7.7.2
Execution of the Test...29
Diagram of pneumatic control system ...31 8.1
Pneumatic control system O2 / N2O / AIR...31
8.2
Pneumatic control system O2 / N2O...32
Troubleshooting Guide ...33 9.1
Portec ...33
9.2
Circle System...34
Technical Data ...35 10.1 Dimensions ...35 10.2 Type of gas connections ...35 10.3 Measuring range of the flowmeter tubes ...36 10.4 Accuracy of the flowmeter tubes...36 10.5 O2-Failure alarm ...36 10.6 Technical Data Circle System ...36
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List of spare parts...37 11.1 Circle system ...37 11.1.1 Semi-annual servicing circle system ...38 11.2 Absorber ...39 11.2.1 Semi-annual servicing Absorber ...39 11.3 Expiration valve...40 11.3.1 Semi-annual servicing expiration valve ...40 11.4 Inspiration valve ...41 11.4.1 Semi-annual servicing inspiration valve ...42 11.5 Artec / Portec ...42 11.6 Vaporizer ...44
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Table of Contents 11.7 Flowmeter tube ...45 11.8 Spindle 46 11.9 Instruction Flowmeter tube...48
© F. Stephan GmbH
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Measuring of electrical power leakage ...51
13
Servicing ...53
14
Test Certificate...55
15
Acceptance of the apparatus ...57
16
Index of Figures ...59
17
Index of Tables ...61
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Notes 63
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General Information
1
General Information
1.1
Equipment designation and manufacturer
Equipment designation Manufacturer
Artec /Portec F. Stephan GmbH - Medizintechnik Kirchstrasse 19 56412 Gackenbach, Germany (+)49 (6439) 9125 – 0 (+)49 (6439) 9125 – 111 [email protected] www.stephan-gmbh.com
1.2
Technical safety inspections Technical safety inspections are to be carried out every six months by the manufacturer or an authorized Technical Service Team of F. STEPHAN GMBH.
1.3
Maintenance For reasons of equipment safety and reliable functioning, it is recommended that the maintenance of the inhalation anesthesia units, ARTEC / PORTEC, also be carried out in conjunction with the semiannual technical safety inspections. Maintenance is to be carried out only by a service team authorized by F. STEPHAN GMBH. When carrying out maintenance or servicing, use only those replacement parts that are supplied by F. STEPHAN GMBH.
© F. Stephan GmbH
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1
General Information
1.4
Warranty The manufacturer grants a 24-month warrant effective from the date of purchaser. Any modification or repair work carried out on the equipment may only be done by F. STEPHAN GMBH or an authorized technical team. Otherwise the warranty becomes invalidated. In validation of the warranty can also arise through improper handling and opertion of the equipment. Claims
Warranty claims that can be attributed to improper operation, insufficient care and maintenance shall not be honored by the manufacturer. The manufacturer guarantees only for the safety and reliable operation of the equipment only if the operating and servicing instructions are strictly adhered to.
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Connections on part of the supply system
2
Connections on part of the supply system
2.1
Check of the plug-in gas couplings O2, N2O, AIR for: correct color coding correct fit in the gas socket external damage
2.2
Check of the gas connection tubes O2, N2O, AIR, for: correct connection of the plug-in gas coupling correct connection to the screw joint of the connecting thread correct color coding external damages
2.3
Check of the screw joints of the connecting threads O2, N2O, AIR for: Tightness correct color coding of the individual types of gas damage to the thread
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2
Connections on part of the supply system
2.4
Check of the female connecting threads O2, N2O, AIR for: firm fit correct coding of the threads of the individual appliances correct color coding on the foil damage to the thread
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Description of Design and Performance
3
Description of Design and Performance
3.1
Gas-mixing-unit 2 and 3 (GME 2/GME 3)
02
02
N 20
2
2
12
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12 11 8 10 6 4 8 2 7
0, 6
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AIR N 20
0, 2
N2 O
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N20
Fig. 1: GME 2 Art.Nr.: 1 150 61 070
0 FLUSH 2
2
02
2
AI R
AI R
N20
GME 3 Art.Nr.: 1 150 61 071
The gas-mixing unit serves as proportioning device for medical gases (e.g. oxygen, nitrous oxide and compressed air).The desired gases can be mixed in any relation by means of the proportioning valves below the flowmeter tubes. The types of gas can be clearly recognized on the control knobs. To prevent confusion, the control knob of the regulating valve for oxygen differs haptically from the two other valves. Inadvertent shift of the settings is avoided by a special twisting-prevention device. The proportioning valves (control knobs) permit a continuous flow, when they are rotated counterclockwise. The measuring area for O2 consists of two flowmeter tubes, so that an exact proportioning is guaranteed.
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3
Description of Design and Performance The high precision flowmeter tube (at the left) indicates the measuring range from 0 to 2 l/min, the "rough" flowmeter tube (at the right) indicates the flow quantities from 2 to 15 l/min. Reading line is the upper edge of the float. Graduation of the lower scale parts of the measuring tubes (AIR/N2O) is more closely stepped. Because the dimensions of the lateral parts of the GME 2/3 can be altered optionally, the use of flowmeter tubes of other manufacturers (e.g. Rota, KDG and others) is possible.
Fig. 2: Gas Mixing Unit
3.1.1
O2-Flush Depressing the O2-flush-button effects a quick oxygen supply (approximately 50 l/min) directly to the outlet for fresh gas ( not via the vaporizer for anaesthetic agent). Releasing the O2-flush-button effects return to the initial position.
3.1.2
AIR / N2O-Change-Over The AIR/N2O-change-over-switch is situated below the respective control knobs (AIR/N2O). It makes preselection of the gases AIR or N2O possible. The appropriate proportioning of the gases is carried out by means of the regulating valves O2-Failure Alarm.
In case of a decrease of pressure in the supply system (oxygen lower than 2,8 bar ) an audible alarm sounds for at least 7 seconds. No muting is possible.
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3.1.3
Description of Design and Performance
Nitrous Oxide Blocking If pressure of oxygen further decreases to approximately 2 bar,the portion of N2O is also reduced proportionally to the portion of oxygen. In case of a total failure of oxygen supply, the flow of N2O is reduced to zero.
The readiness for service of the apparatus can only be restored by providing the prescribed pressure of oxygen of at least 2 bar at the connection with the supply system.
© F. Stephan GmbH
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Vaporizer, Vaporizer holding device
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Vaporizer, Vaporizer holding device
4.1
Vaporizer Check setting wheel and stop for performance Check indication of filling level for damage Check drain screw for easy running and tightness Check performance of safety filling socket for performance Check locking device of vaporizer Verify concentration values of the vaporizer with the help of a testing device for anaesthetic gases maximum admissible tolerance in accordance with DIN 13252: +/20% of the set value or 0,2 Vol % absolute, always the higher value of the two.
4.2
Vaporizer holding device Check sealing valves for tightness Exchange O-rings Check for firm fit
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5
Cylinder Supply Unit
Cylinder Supply Unit Performance test of the high-pressure gauges for N2O and O2 Check of the connections for supply cylinders Check of correct coding of threads Check of the packings of the supply cylinders Check screw joints and pipe installations for tightness and damages Check housing for damages Check attached components for firm fit
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6
6
Circle System
6.1
Design and Description of Performance
Circle System
The circle system together with the patient forms a closed cycle, into which fresh gas is fed via the fresh gas pipe line. Excess gas escapes through the excess gas valve (10)from the cycle and is removed from the field of activity of the anaesthetist by means of the suction system for anaesthetic gas (13).During the inspiration phase, the gas contained in the system is transported to the patients' lungs by effecting pressure, produced either by the respirator or by manual operation of a respiratory bag. The consequent PRESSURE RELIEF in the system during the expiration phase and the increase of pressure in the lungs due to the elasticity of the thorax makes the gas flow back out of the lungs. Thereby it is the task of the inspiration valve (1) and the expiration valve (7) to permit the flow of gas only in one direction and so to establish the cycle. Prior to reaching the patient again, CO2 is removed in the two absorbers (2). Humidity and heat given off by the patient are fed back to him in such a semi-closed system, which prevents desiccation and excessive cooling of the airways. The fresh gas feeder is located on the lower end of the holding tube. The adjustability of elevation and the possible swivelling stand for a good adaptation to the local conditions of the operating theatre. The respiratory pressure gauge(3), which can be slipped onto the holding device of the circle system, has a measuring range from - 10 to 100 mbar. It can be replaced by a blind plug. As a standard, a mechanic volumeter (9) is installed below the expiration valve, which measures all expiratory values of respiratory volume. The measuring of O2-concentration, required in accordance with DGAI, is carried out by means of a polarographic cell (by Clark) (1) at the head of the inspiration valve. Moreover, the circle system is provided with connection tapers in accordance with ISO respectively DIN 13 252, so that corrugated tubes for the ventilation of adults as well as tube systems for infants can be used. The excess valve (10) serves to carry off spent respiratory gases. It can be operated in four different adjustments.
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6
Circle System
6.1.1
CL (closed) The valve is completely closed. This setting is necessary for operation in respirator mode. In this mode, the spent respiratory gases are evacuated via the ejector on the patient component during the expiration phase.
6.1.2
Pressure Range from 5mbar to 50mbar This setting is used to limit the maximum pressure during manual ventilation. When the set pressure is reached, the valve evacuates.
6.1.3
Spontaneous Respiration During spontaneous respiration of the patient under light anaesthesia, the valve closes in the inspiration phase, the patient now breathes the fresh gas provided by the apparatus. In the expiration phase, the valve opens and evacuates the system until ambient pressure is reached. This setting is to be used in case of assisted ventilation with the patient triggering the respiration and the respirator deepening the respiration. Aside of that, it is possible to switch to SP briefly in case of manual ventilation in the pressure range of 5 to 50 mbar to evacuate an overfilled respiratory bag.
6.1.4
VOL (volume-controlled ventilation) With the valve setting VOL, the circle system is closed automatically to guarantee supply of the patient with the desired respiratory working volume. Spent and excess respiratory gases escape from the valve at the end of the expiration phase. During the expiration phase, pressure in the system never rises above 1,5 mbar.
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6.1.5
Circle System
Circle System Check performance of inspiration- and expiration valve and contact surfaces of the valves for damages Check tapers and taper seats for damages Check absorber for damages and tightness Check performance of respiratory pressure gauge Check setting values and performance of the Berner-valve Check fresh-gas-feed for passage of flow and tightness Check tube system, Y - piece and mask In the course of semi-annual servicing, all packings and O-rings must be exchanged.
© F. Stephan GmbH
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Performance Test
Performance Test
Fig. 3: Gas Mixing Unit Proportioning valves (1) on flowmeter unit closed
7.1
Execution of the Test Cautiously open the proportioning spindle for oxygen while observing the respiratory pressure gauge (2). Fill pipe line system, until the respiratory pressure gauge comes to a standstill at constantly 60 mbar. The float of the oxygen flowmeter now indicates the dimension of the leakage.
Fig. 4: Proportioning spindle for oxygen
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Performance Test
7.2
O2-Flush
Do not use in the application described above. You will destroy the manometer. Attention Prior to putting the apparatus into service, it must be verified, that the O2flush-valve closes immediately and automatically after the key has been released. For this test, the flush-key must be depressed briefly. When released, it must return immediately to its initial position.
7.3
Air / N2O-Change Over (Basic setting) O2 - proportioning valve closed N2O-proportioning valve set at 3 l/min Proportioning valve for AIR set at 3 l/min Change-over-switch in "N2O" – position Suction system for anaesthetic gas connected O2-monitor calibrated and in operation
7.3.1
Execution of the Test The flowmeter tube for N2O must indicate 3 l/min, while the flowmeter tube for compressed air must give a reading of zero. The O2-monitor indicates ca. 0% O2 ( after a brief delay ). When changing over from N2O to AIR (Change-over-switch) without altering the settings of the proportioning valves the float of the N2O-flowmeter tube must return to zero, while in parallel the reading of the flowmeter tube for compressed air must rise to 3 l/min. As a confirmation, the O2-monitor shows a reading of 21 % O2.
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7.4
Performance Test
Check of types of gas and test of the safety devices (Nitrous oxide blocking and O2-failure-alarm) Apparatus in operating mode Suction system for anaesthetic gas connected Spindles of all proportioning valves opened to 3 l/min Change-over-switch for AIR/N2O in N2O-position
7.4.1
Execution of the Test Separate angular plug for O2 from supply system The flow of oxygen must decrease continuously The O2-failure alarm sounds, when line pressure reaches approximately 2,8 bar When pressure further decreases to approximately 2 bar, the nitrousoxide-blocking must set in and lower the N2O flow in parallel to the oxygen flow, until, with the system completely emptied, both volume flows have decreased to zero. Oxygen supply is restored by inserting the angular O2-plug. When the N2O-supply is interrupted, only the N2O-flow drops to zero After restoring of the nitrous-oxide-supply, finally change over to AIR and separate this gas from the supply pipe line. Here as well the flow of N2O must drop to zero.
7.4.2
Proportioning Valves
When the proportioning valves are closed, the respective floats of the corresponding flowmeter tubes must move back to the zero position. If this is not the case, a leakage of the respective spindle exists, which must be eliminated by the service technician. When carrying out this test, do not forget to change over from N2O to AIR!
© F. Stephan GmbH
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