Dräger Babylog 8000 Operating manual

6173.3
9029623
Revision 10.0
Because you care
Emergency Care • Perioperative Care • Critical Care • Perinatal Care • Home Care
Technical Service Manual
Babylog 8000/8000SC/8000 plus
Intensive Care Ventilator

Copyright by Dräger Medical AG & Co. KGaA, Lübeck, Germany.
No reproduction allowed for commercial purposes.
Read and understand the Instructions for Use/Operator’s Manual.
This Technical Documentation does not replace the Instructions for Use/Operator’s
Manual.
The warranty and liability conditions of the general terms and conditions for business
transactions of Dräger Medical AG & Co. KGaA are not extended by this Technical
Documentation.
Observe all applicable technical laws and regulations.
Insofar as reference is made to laws, regulations or standards, these are based on the
legal system of the Federal Republic of Germany. Observe the laws and regulations
applicable in your country.

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Contents
General
1Notes 9
1.1 Symbols and Definitions ......................................................................................................... 9
Function Description
1General 13
1.1 Ventilation Modes ................................................................................................................. 13
1.2 Additional Functions ............................................................................................................. 13
1.3 Monitoring ............................................................................................................................. 13
2Block Diagrams 14
2.1 Block Diagram of the Components in
Babylog 8000/Babylog 8000 SC with LC Display 14
2.2 Block Diagram of the Components in
Babylog 8000/Babylog 8000 plus with EL Display 15
2.3 Block Diagram of the Babylog 8000/ Babylog 8000 plus/Babylog 8000 SC ........................ 16
3Airway Monitoring 17
3.1 Airway Pressure ................................................................................................................... 17
3.2 Trigger Signal ....................................................................................................................... 17
3.3 Measurement of the Fraction of Inspired O2 ....................................................................... 17
3.4 Patient Flow (Babylog 8000/Babylog 8000 plus) .................................................................. 18
4Monitoring Functions 19
4.1 Fraction of inspired O2(FiO2) ............................................................................................... 19
4.1.1 O2Measurement .................................................................................................... 19
4.1.2 O2Calibration ......................................................................................................... 19
4.2 Gas Supplies ........................................................................................................................ 20
4.3 Airway Pressure Monitoring ................................................................................................. 20
4.4 Disconnect Monitoring ..........................................................................................................20
4.5 Overpressure and Low Pressure Alarms ............................................................................. 21

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Contents
4.5.1 Babylog 8000 up to Software Version 3.0 ...............................................................21
4.5.2 Dynamic Stenosis Limit ...........................................................................................21
4.6 Minute Volume Monitoring (Babylog 8000/Babylog 8000 plus) ............................................23
4.6.1 Babylog 8000 with Software Versions 2 and 3 .......................................................23
4.6.2 Babylog 8000 Software with Version 4.0 or Higher ................................................23
4.6.3 Babylog 8000 plus ..................................................................................................23
4.7 Audible Alarm Generator Monitoring ....................................................................................23
4.8 Operating Voltage Monitoring ............................................................................................... 23
4.9 Rotary Potentiometer Monitoring ..........................................................................................23
4.10 ROM Test ..............................................................................................................................24
4.11 RAM Test .............................................................................................................................. 24
4.12 Temperature Monitoring ........................................................................................................24
4.13 Relay and Valve Monitoring ..................................................................................................24
4.14 Battery Monitoring ................................................................................................................24
4.15 Flow Measurement Monitoring (Babylog 8000/ Babylog 8000 plus) .................................... 24
5Alarms, Cautions and Advisory Messages 25
5.1 Message Display .................................................................................................................. 25
5.2 Display and Menu .................................................................................................................25
5.2.1 Babylog 8000/Babylog 8000 SC with LC Display ...................................................26
5.2.2 Babylog 8000/Babylog 8000 plus with EL Display ..................................................26
6Function of the Control Elements 27
6.1 Potentiometers (Rotary Knobs) ............................................................................................27
6.1.1 Fraction of inspired O2(O2 vol.%) .......................................................................... 27
6.1.2 Inspiratory time (TI) .................................................................................................27
6.1.3 Expiratory time (TE) ................................................................................................27
6.1.4 Inspiratory flow (Insp. Flow) ....................................................................................27
6.1.5 Inspiratory pressure limit (Pinsp) .............................................................................27
6.1.6 PEEP/CPAP ............................................................................................................27
6.2 Keys ......................................................................................................................................28

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Contents
6.2.1 CPAP ...................................................................................................................... 28
6.2.2 IPPV/IMV (CMV) (up to software version 4.n) ........................................................ 28
6.2.3 Man. Insp. ............................................................................................................... 28
6.2.4 2-min Silence .......................................................................................................... 28
6.2.5 Reset/Check (OK) .................................................................................................. 28
6.2.6 Backlight On/Off (Babylog 8000/8000 SC with LC Display) ................................... 28
6.2.7 "Cal. Config." (as of software version 5.n) .............................................................. 29
6.2.8 Keys ....................................................................................................................... 29
7Cold Start/Warm Start Behavior 30
7.1 Cold-Start Behavior .............................................................................................................. 30
7.2 Warm-Start Behavior ............................................................................................................30
8Description of Pneumatic Functions 31
8.1 Gas Supplies ........................................................................................................................ 31
8.2 Controlled Ventilation ........................................................................................................... 32
8.2.1 Inspiration ............................................................................................................... 32
8.2.2 Expiration ............................................................................................................... 33
8.2.3 PEEP ...................................................................................................................... 33
8.2.4 CPAP ...................................................................................................................... 33
9Measurement of the Ventilation Parameters 34
9.1 O2 Measurement .................................................................................................................. 34
9.2 Measurement of the Airway Pressure .................................................................................. 34
9.3 Pneumatics Control PCB ...................................................................................................... 35
9.4 Pneumatics Analog PCB ...................................................................................................... 36
9.5 Patient System Heater ......................................................................................................... 37
9.6 Pressure Sensor Base PCB ................................................................................................. 37
9.7 O2 Amplifier PCB ................................................................................................................. 37
10 Components of the Electronic Assembly 38
10.1 Power Supply Unit ................................................................................................................ 38

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10.2 Motherboard PCB .................................................................................................................38
10.3 CPU 68000 PCB ................................................................................................................... 39
10.4 I/O PCB ................................................................................................................................ 40
10.5 Flow PCB (Babylog 8000/Babylog 8000 plus) (optional) ......................................................41
10.6 Monitoring PCB .................................................................................................................... 42
10.6.1 Measurement of Analog Signals .............................................................................42
10.6.2 Measurement of Digital Inputs ................................................................................42
10.6.3 Measurement of Digital Outputs .............................................................................42
10.7 Front Adapter PCB ............................................................................................................... 45
10.8 Front Controller PCB
(Babylog 8000/Babylog 8000 SC with LC Display) 46
10.9 Front PCB (Babylog 8000/Babylog 8000 plus with EL Display) ...........................................47
10.10Display PCB (Babylog 8000/Babylog 8000 SC with LC Display) .........................................48
10.11 EL display (Babylog 8000/Babylog 8000 plus with EL Display) ...........................................49
10.12Potentiometer Field .............................................................................................................. 50
10.13Display Field ......................................................................................................................... 50
10.14Communication PCB ............................................................................................................51
10.15Interface PCB ....................................................................................................................... 52
11 Sensors 53
11.1 Pressure Sensors .................................................................................................................53
11.2 Y-Piece with Flow Sensor (Babylog 8000/Babylog 8000 plus) .............................................53
11.2.1 Measuring Principle of the Flow Measuring Bridge ................................................54
11.3 O2 Sensor ............................................................................................................................ 55

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Contents
Replacing Non Repairable Items
1Important Information 59
2Cleaning or Replacing the Cooling Air Filter Every 4 Weeks 60
3Replacing the O2Sensor Capsule 61
3.1 O2Sensor Calibration ........................................................................................................... 61
3.2 Calibrating the O2Sensor After Replacement ...................................................................... 61
3.3 Disposing of the O2Sensor Capsule .................................................................................... 63
4Replacing the Lip Seals Every 2 Years 64
5Replacing the NiCd Battery (Power Failure Alarm) Every 2 Years 65
6Replacing the Pressure Reducer Every 6 Years 67
Schematics and diagrams
1Schematics and Diagrams 77
Error List
1Error messages 91
2List of device error messages 92
Annex
Spare parts list 97
Test List 97
Technical Information according to EMC standard IEC/EN 60601-1-2:2001 97

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Contents

7
General

8

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9
Babylog 8000 General
1Notes This Technical Documentation/Service Manual conforms to the International
Standard IEC 60601-1.
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 Documenta-
tion/Service Manual, the equipment may operate improperly or unsafely, or
the equipment could be damaged.
Use only original Dräger parts and supplies.
The maintenance procedures described in this Technical Documenta-
tion/Service Manual may be performed by qualified service personnel only.
These maintenance procedures do not replace inspections and servicing by
Dräger Medical AG & Co. KGaA.
1.1 Symbols and Defini-
tions
Strictly follow the Instructions for Use/Operating Instructions! This
Technical Documentation does not replace the Instructions for
Use/Operating Instructions. Any use of the product requires full
understanding and strict observation of the product-specific Instruc-
tions for Use/Operating Instructions.
Unless otherwise stated, reference is made to laws, regulations or stan-
dards (as amended) applicable in the Federal Republic of Germany.
This symbol indicates a warning.
This symbol indicates tips and useful information.
This symbol is used to alert against unsafe practices when handling elec-
trostatic sensitive devices (ESD).
Definitions according to German standard DIN 31051:
Inspection = examination of actual condition
Maintenance = measures to maintain specified condition
Repair = measures to restore specified condition
Servicing = inspection, maintenance, and repair

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General Babylog 8000

11
Function Description

12

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Function description Babylog 8000
1 General
Babylog 8000/Babylog 8000 plus has a flow measurement function. The Babylog 8000 SC can be
upgraded to a Babylog 8000 using the "flow measurement conversion kit.
1.1 Ventilation Modes
Babylog 8000/Babylog 8000 plus/8000 SC provides the following ventilation modes:
IPPV (Intermittent Positive Pressure Ventilation), controlled and assisted constant-volume ventilation
SIPPV (Synchronized Intermittent Positive Pressure Ventilation), synchronized controlled and
assisted constant-volume ventilation
IMV (Intermittent Mandatory Ventilation)
SIMV (Synchronized Intermittent Mandatory Ventilation) weaning method for spontaneously
breathing patients
CPAP (Continuous Positive Airway Pressure) spontaneous breathing with positive airway pressure
PSV (Pressure Support Ventilation) (optional as of software version 5.n)
1.2 Additional Functions
Babylog 8000/Babylog 8000 plus/8000 SC provides the following (optional) additional functions:
High-frequency ventilation (HV) (as of software version 4.n)
Volume guarantee (VG) (as of software version 5.n)
1.3 Monitoring
Babylog 8000/Babylog 8000 plus/8000 SC has integrated monitoring functions for:
Fraction of inspired O2(FiO2)
Airway pressure (Paw)
Flow ( )(Babylog 8000/Babylog 8000 plus)
Minute volume (MV)
Tidal volume (VT)

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Function description Babylog 8000
2 Block Diagrams
2.1 Block Diagram of the Components in
Babylog 8000/Babylog 8000 SC with LC Display
Fig. 1: Block diagram of the Babylog 8000/8000 SC with LC display
Elektronic unit
Front
Pneumatic unit
Loud speaker
Battery
Fan
RS232 PCB
CPU 68000 PCB
Communication PCB
Watch dog PCB Monitoring PCB
Flow PCB (not 8000SC)
I/O PCB
Power supply PCB
Flow connector
LP Mutterboard
Frontadapter PCB
Frontcontroller PCB
Monitoring field
Display PCB
Potentiometer field
LC display
Pressure sensor PCB
O2 ampilfier
O2 sensor
Pneumatic Analog PCB
Pneumatic driver PCB
Patiententeil- heating
PEEP/PIP
Valves
pressure AIR
pressure O2
Pinsp
Pexsp
Vol.% O2
Power cord

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15
Function description Babylog 8000
2.2 Block Diagram of the Components in
Babylog 8000/Babylog 8000 plus with EL Display
Fig. 2: Block diagram of the Babylog 8000/Babylog 8000 plus with EL display
Elektronic unit
Front
Pneumatic unit
Loud speaker
Battery
Fan
RS232 PCB
CPU 68000 PCB
Ccommunication PCB
Watch dog PCB Monitoring PCB
Flow PCB
I/O PCB
Power supply PCB
Flow connector
LP Mutterboard
Frontadapter PCB
Front PCB
Monitoring field
ELD converter
Potentiometer field
EL display
Pressure sensor PCB
O2 amplifier
O2 sensor
Pneumatic Analog PCB
Pneumatic amplifier PCB
Patient unit heating
PEEP/PIP
Valves
pressure AIR
pressure O2
Pinsp
Pexsp
Vol.% O2
Power cord

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Function description Babylog 8000
2.3 Block Diagram of the Babylog 8000/ Babylog 8000 plus/Babylog 8000 SC
Fig. 3: Block Diagram of the Babylog 8000/Babylog 8000 plus/Babylog 8000 SC
LEDs 2 red Alarm LEDs
Potentiometer
Front
CPU (Master)
I/O
Communication
Flow
Babylog 8000
Babylog 8000 plus
E
V
E
V
E
P
E
P
E
P
E
P
E
O
E
O
Monitoring
Battery
Reserve
horn
LC display
EL display (Babylog 8000/ Babylog 8000 plus)
keys
Flow sensor
PAIR PO2 O2-SensorPexsp Pinsp
+27 V +5 V
&
24 Ventile
Valve amplifier
Valve monitoring
PEEP/PIP valve

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Function description Babylog 8000
3 Airway Monitoring
In the ventilation modes IPPV/IMV and CPAP, the airway pressure (Paw), the flow at the Y-piece VT
(Babylog 8000/Babylog 8000 plus), and the fraction of inspired O2(FiO2) are measured.
Depending on the selected mode and the menu settings, the parameters are monitored and displayed on
the screen. Pressure and flow curves as well as their storage can be displayed graphically on the LC
display or EL display. In all ventilation modes, the chronological sequence of the airway pressure (Paw) is
displayed in the LED bargraph.
3.1 Airway Pressure
Two internal pressure sensors measure the pressure at the inspiratory outlet (Pinsp) and the pressure at
the expiratory inlet (Pexp). The airway pressure is calculated as follows:
Paw = Pinsp – 0.7 (Pinsp – Pexp)
The following pressures are calculated from the Paw pressure signal:
Peak pressure (Peak)
Mean airway pressure (Pmean)
Positive end-expiratory pressure (PEEP)
The peak pressure is the maximum positive pressure of the most recent respiratory cycle. After 30 s, at
the latest, a new respiratory cycle must be recognized and a new measured value for the peak pressure
must be generated, otherwise the current measured value is no longer valid and is removed from the
display.
The mean airway pressure is the initial value of a software digital filter.
The PEEP is either the pressure value during the expiratory phase at a zero expiratory flow or the last
measured value before the next inspiration. Like the peak pressure, the PEEP is no longer valid after 30 s
and is removed from the display if a new measured value is not generated within the 30-s period.
3.2 Trigger Signal
In order to generate a trigger signal, the inspiratory flow must be integrated during spontaneous breathing
and compared to the adjustable trigger threshold.
3.3 Measurement of the Fraction of Inspired O2
A O2sensor in the inspiration line measures the O2content of the respiratory gas.
Calibration data of the O2sensor is maintained after switching off the Babylog. If the Babylog has been
out of operation for more than 24 hours, a calibration will automatically be carried out upon power-on.
The operator may also initiate a calibration manually, e.g. as required after replacing an O2sensor.

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Function description Babylog 8000
A two-step calibration with 21% and 100% O2is always carried out in order to achieve a higher
measurement accuracy over the whole concentration range and/or to be able to recognize a spent sensor
cell.
The calibration procedure is described under section "4 Monitoring Functions".
If the O2measurement fails, the Babylog generates an alarm. This alarm status is shown in the status
field of the screen by the flashing indication "FiO2".
3.4 Patient Flow (Babylog 8000/Babylog 8000 plus)
A direction-sensitive hot-wire flowmeter integrated into the Y-piece measures the inspiratory and
expiratory flows through the tube. This measurement function must be reactivated each time after
switching on Babylog 8000/Babylog 8000 plus and after each replacement of the sensor by calibrating the
sensor. The flow signal is used to calculate the following values:
Tidal volume (VT)
Minute volume (MV)
Percentage of the MV uptake through spontaneous breathing
Tube leakage
The tidal volume is the expiratory flow signal applied between two breathing phase cycles.
Unlike the tidal volume, the minute volume is not related to a respiratory cycle. In the same way the
inspiratory MV is calculated for leak rate detection. The expiratory minute volume is displayed. In addition
to the complete minute volume, Babylog also calculates the expiratory minute volume uptake through
spontaneous breathing.
Babylog calculates the percentage by comparing the total minute volume and the minute volume uptake
through spontaneous breathing:
spont. = (MVspontaneous/MV) *100%
The leakage at the tube can be estimated by comparing the inspiratory and the expiratory minute volume.
The leakage at the tube L is calculated as follows:
L= (MVinsp _MVexp)/(MVinsp + MVexp) *100.
The respiratory rate f is measured through the inspiratory respiratory phase cycles.
All measured values derived from the patient flow become valid only after successful calibration of the
flow sensor.
If the flow sensor or the measuring electronics fails, an alarm is generated. However, Babylog can still be
used without the functions depending on the flow measurement. This alarm status is shown in the status
field of the screen by the flashing indication "flow".