Oxylog 1000 Technical Documentation Rev 6.0 March 2006

Contents General 1

Symbols and Definitions

3

2

Notes

3

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K5503400IECIVZ.fm 16.03.06

Function Description 1

General information on the Oxylog 1000

7

2

Components of the Oxylog 1000

8

3

Pneumatic Control (old Oxylog 1000)

10

3.1

Gas Supply ... 10

3.2

Frequency Control ... 11

3.3

Air Mix/No Air Mix Selector Switch ... 12

3.4

Safety Devices ... 13

3.5

Alarm Silence ... 17

3.6

Pressure Sensor ... 18

4

Location of Oxylog 1000 (old) Assemblies

19

5

Pneumatic Control (new Oxylog 1000)

20

6

5.1

Gas Supply ... 20

5.2

Frequency Control ... 21

5.3

Air Mix/No Air Mix Selector Switch ... 22

5.4

Safety Devices ... 23

5.5

Alarm Silence ... 27

5.6

Pressure Sensor ... 28

Location of Oxylog 1000 (new) Assemblies

29

I

Contents Maintenance Procedures 1

General notes

33

2

Maintenance intervals

33

3

2.1

Measures every two years ... 33

2.2

Measures every six years ... 33

Pressure regulator

34

3.1

General points concerning the pressure regulator ... 34

3.2

Removing/replacing the pressure regulator ... 34

Schematics and Diagrams 1

Flow chart of the Oxylog 1000 (old)

43

2

Flow chart of the Oxylog 1000 (new)

45

3

Tubing Diagram of the Oxylog 1000 (old)

47

4

Tubing Diagram of the Oxylog 1000 (new)

49

Annex Parts catalog Test List

K5503400IECIVZ.fm 16.03.06

All rights reserved. Copyright reserved.

II

General

1

Oxylog 1000 1

Symbols and Definitions

General

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.

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. All rights reserved. Copyright reserved.

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It is our recommendation to use only Dräger parts and supplies.

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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General

Oxylog 1000 Know-how contained in this Technical Documentation is subject to ongoing change through research and development and Dräger Medical reserves the right to make changes to this Technical Documentation without notice.

4

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All rights reserved. Copyright reserved.

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

5

Oxylog 1000 1

General information on the Oxylog 1000

Function Description The Oxylog 1000 is a time-controlled, volume-constant emergency and transport ventilator for patients weighing 7.5 kg or above. The Oxylog 1000 has the operating mode: controlled ventilation (IPPV = Intermittent Positive Pressure Ventilation).

1: Front view of the Oxylog 1000

For internal use only. Copyright reserved.

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Fig.

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7

Function Description The Oxylog 1000 comprises the following components: –

Pressure reducer

–

ON/OFF switch

–

Inspiratory/expiratory switching valve

–

Minute volume control valve

–

Frequency control

–

Safety valve

–

Emergency air valve

–

Pressure gauge

–

Injector

–

Vent valve

–

Air Mix/No Air Mix selector switch

–

Logic circuit for disconnect alarm and stenosis alarm

–

Alarm silence

8

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Components of the Oxylog 1000

For internal use only. Copyright reserved.

2

Oxylog 1000

Figure 2

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Flowcontrol

2,7 bar - 6 bar

Filter

Minute volume valve Injector

Air Mix/No Air Mix selector switch

Insp./exp. switching valve

Frequency control

Pressure regulator

ON/OFF switch

For internal use only. Copyright reserved.

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Switching valve

Pushbutton valve

Alarm silence

Alarm generator

Silence

Paw high

Paw low

Ventilation valve

Psupply pressure Pressure gauge

Supply pressure switching valve

Logic circuit for disconnect and stenosis alarm

Safety valve Emergen cy air valve

Pressure sensor

Vent valve

Oxylog 1000 Function Description

Block diagram of the Oxylog 1000

9

Function Description 3

Pneumatic Control (old Oxylog 1000)

3.1

Gas Supply

Oxylog 1000

The compressed gas is supplied from the central supply system (CS) or from an O2 cylinder with pressure regulator. The operating pressure of the Oxylog 1000 is between 2.7 bar and 6 bar.

CAUTION Risk of damage to equipment! Dust, oil and humidity in medical gases may impair the functioning of the equipment or damage it. Use only dust-free, oil-free and dry medical gases. The supply gas flows via the port (A1), the filter (F1) and the pressure regulator (DR1) to the manifold (O). The pressure regulator (DR1) regulates the pressure of the supply gas to 1.5 bar.

DR1 F1 Manifold A1

10

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3: Segment of the flow chart: Supply gas inlet

For internal use only. Copyright reserved.

Fig.

Oxylog 1000 3.2

Function Description

Frequency Control

When the unit is off, driving gas flows via the manifold and through the dosage valve D2 to the 3/2-way valve DMR5 and to DMR6. In consequence, DMR6 switches through and the switching valve WV1 switches to expiration. At the same time DMR1 is switched; DMR2 is vented via the volume V1 and DMR1. If the switch S1 is switched, the gas flows via the manifold to D5, the frequency control valve FD1, and to DMR1 and 4. DMR4 fills V2, and DMR5 is switched with a delay; this vents DMR6, 4 and 1. At the same time, DMR3 is switched over via D1 and DMR2, and WV1 switches to inspiration. Vent valve EV is closed via DMR18.

PA

EV

S1

BV

I 0 WV1

S

MV

Manifold DMR1

DMR18

I DMR2

DMR3

V1 D5

FD1

Manifold

D1 V2

DMR4

D2 DMR5

Figure 4

DMR6

Segment of the flow chart: Frequency Control

During expiration, the vent valve (EV) is open to the atmosphere, so that pressure is relieved from the hose system (S) and the ventilation valve (BV); the patient can breathe out through the expiration branch of the ventilation valve (BV) to atmosphere. For internal use only. Copyright reserved.

Version 2.0_ Released_Printed on_16.03.06_F5503400T01.fm

During the inspiration phase, the supply gas flows through the switching valve (WV1 - see illustration above), the minute volume control valve (MV), the injector (I), the patient connection port (PA), the hose system (S) and the ventilation valve (BV) to the patient.

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Function Description 3.3

Air Mix/No Air Mix Selector Switch

Oxylog 1000 The setting of the Air Mix/No Air Mix selector switch determines the O2 concentration of the supply gas for the patient. When the Air Mix/No Air Mix selector switch is set to "Air Mix", the injector (I) takes in ambient air through the 3/2-way valve (WV2). The O2 concentration of the supply gas for the patient is approx. 50 vol.% O2. When the Air Mix/No Air Mix selector switch is set to "No Air Mix", the injector (I) takes in the supply gas through the 3/2-way valve (WV2). The O2 concentration of the supply gas for the patient is approx. 100 vol.% O2.

S2

WV2 I

12

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Segment of the flow chart: Air Mix/No Air Mix selector switch

For internal use only. Copyright reserved.

Figure 5

Oxylog 1000 Safety Devices

The Oxylog 1000 has the following safety devices: –

Mechanical safety valve

–

Pressure gauge

–

Emergency air valve

–

Disconnect alarm

–

Stenosis alarm

–

Alarm warning of failure of the compressed gas supply

–

Alarm silence

3.4.1

Mechanical Safety Valve

The mechanical safety valve limits the ventilation pressure to approx. 80 mbar.

3.4.2

Pressure Gauge

The pressure gauge indicates the current airway pressure during the inspiration phase. The display range is -10 mbar to 80 mbar.

3.4.3

Emergency Air Valve

The spontaneously breathing patient can breathe in ambient air through the emergency air valve if the Oxylog 1000 has failed due to a fault.

For internal use only. Copyright reserved.

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3.4

Function Description

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Function Description 3.4.4

Disconnect Alarm

Oxylog 1000 The disconnect alarm (Paw low) warns of a pressure drop in the patient gas. The disconnect alarm is triggered under the following conditions: –

The hose system connection to the patient is interrupted

–

The ventilation valve is incorrectly fitted or damaged

–

The cuff has a leak

–

Internal device error

If the ventilation pressure is less than 10 mbar (disconnect condition), the 3/2-way valve (DMR7 - see illustration above) is not triggered. That is, the 3/2-way valves (DMR9 and DMR10) operate the 3/2-way valve (DMR11). During the expiration phase the indicator (Paw low) visually indicates the disconnection and the alarm generator (L1) delivers an audible warning. If the ventilation pressure is higher than 10 mbar, the 3/2-way valve (DMR7) switches. The 3/2-way valves (DMR9, DMR10 and DMR11) vent to atmosphere. The visual and audible alarms are suppressed.

Ventilation pressure

DMR9

DMR10

DMR11

DMR7

Flow chart of the Oxylog 1000: Disconnect Alarm For internal use only. Copyright reserved.

Figure 6

14

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L1

Oxylog 1000 3.4.5

Stenosis Alarm

Function Description The stenosis alarm (Paw high) warns of a high airway pressure in the patient branch. The stenosis alarm is triggered under the following conditions: –

The patient's airways are blocked

–

The ventilation hose is kinked

–

The lung compliance is reduced

–

The patient "fights" the ventilator

If the ventilation pressure is equal to or higher than 10 mbar, but the alarm limit (30 mbar to 60 mbar) is pre-set lower, the 3/2-way valve (DMR8) is not triggered. The 3/2-way valves (DMR12 and DMR13) vent through the 3/2way valve (DMR8). If the ventilation pressure exceeds the pre-set alarm limit, the 3/2-way valve (DMR8) activates the 3/2-way valves (DMR12 and DMR13). The 3/2-way valve (DMR13) activates the “Paw high” indicator (Z3) and the 3/2-way valve (DMR14) activates the alarm generator (L1). At the same time the 3/2-way valve (DMR8) switches the 3/2-way valve (DMR18). The vent valve (EV) opens the supply gas path to atmosphere. This condition persists until the next inspiratory phase.

EV

DMR18

DMR8

DMR12

DMR13

DMR14 Z3

For internal use only. Copyright reserved.

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L1

Figure 7

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Flow chart of the Oxylog 1000: Stenosis alarm

15

Function Description 3.4.6

Gas Supply Failure Warning (Pv)

Oxylog 1000 If the gas supply fails or falls below a defined pressure, the Oxylog 1000 delivers two alarms: –

Visual alarm indicator "Pv"

–

Audible alarm (alarm generator)

The alarm is triggered under the following conditions: –

The pressure of the gas supply from the central supply system or from the O2 cylinder is inadequate or absent

–

The valve of the O2 cylinder is closed

–

The gas supply connector is incorrectly installed

Pv

16

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Segment of the flow chart: Gas supply failure alarm

For internal use only. Copyright reserved.

Figure 8

Oxylog 1000 3.5

Alarm Silence

Function Description When the pushbutton valve (T1) is pressed the 3/2-way valve (DMR15) fills the volume (V3) and activates the 3/2-way valve (DMR16). The 3/2-way valve (DMR17) vents the alarm generator to atmosphere. The alarm generator (L1) is inactive up to the switching point of the volume (V3) (approx. 2 minutes).

Alarm silence T1 DMR16

DMR17

DMR15 V3 L1

9: Segment of the flow chart: Alarm silence

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Fig.

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Function Description 3.6

Pressure Sensor

Oxylog 1000 During ventilation, the pressure sensor controls and switches the stenosis and disconnection of the patient. The pressure sensor comprises two diaphragms. The ventilation pressure acts on the undersides of the diaphragms. The supply pressure (Insp.) is centered on the craters on the pressure sensor during the inspiration phase. The built-in mechanical springs in the pressure sensor exert different forces on the diaphragms: –

Non-adjustable spring force (10 mbar)

–

Spring force adjustable (30 mbar to 60 mbar) with the alarm control valve

One or other of the diaphragms is raised according to the respective compensation pressures on the mechanical springs.

Ventilation pressure

Insp. 1

7

4

8

Pressure sensor

18

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Figure 10 Segment of the flow chart: Pressure sensor

Oxylog 1000 4

Function Description

Location of Oxylog 1000 (old) Assemblies 1 2 24

3 4

23 22 21 5 6 7

20

8 19

18

9

11 10

12

13

16

14 15

17

Figure 11 Top view of the open Oxylog 1000 (old)

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Table 1

Key

1

3/2-way valve (DMR7)

9

Pressure gauge

17

Indicator (Pv)

2

3/2-way valve (DMR8)

10

Indicator (Silence)

18

Air Mix/No Air Mix

3

Pressure regulator

11

Alarm control valve

19

On switch

4

Alarm logic (under frequency control)

12

Silence button

20

Patient block

5

Volume (expiration)

13

Indicator (Paw low)

21

Vent valve

6

Volume (inspiration)

14

Frequency control valve

22

DMR18

7

Alarm silence

15

Indicator (Paw high)

23

Patient connection port

8

Pressure sensor (double-diaphragm switch)

16

MV control valve

24

Gas connection port

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