workstation_neonatal_care_c500___vn500___gs500_trol.pdf
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Technical Documentation IPM
Workstation Neonatal Care
C500, VN500, GS500, Trolley
Warning
All servicing and/or test procedures on the
device require detailed knowledge of this documentation. Use of the device requires detailed
knowledge and observance of the relevant
Instructions for Use.
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Workstation Neonatal Care
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Table of contents
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Table of contents
General
General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations
List of abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function descriptions
General points about the workstation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function descriptions pneumatic assembly
Pneumatic assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas metering module M1.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basics of flow measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Explanation of the terms NTPD, BTPS and NTPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspiratory unit/safety valve unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Neonatal expiratory valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PATO O2 sensor M12.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nebulizer/ejector option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function descriptions electronics
Electronic assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery NiMH M7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power supply unit M7.3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan unit fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Therapy Control Unit PCB M16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SysCon PCB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
„Connector” PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OLED-Contact PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OLED Controller PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PVT Monitoring PCB M4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RFID PCB M21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve drive M15.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lift magnet M15.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MCable-Mainstream CO2 sensor M11.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heating fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nurse call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Neo Flow PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function description Infinity C500
Infinity C500 function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function description GS500
Gas supply unit GS500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Annex
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Table of contents
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General
This chapter contains general notes and definitions that are important for the
use of this documentation.
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General notes ....................................................................................................................................
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General
General notes
General notes
Notes on use
Read through the following notes thoroughly before applying this documentation.
Dräger reserves the right to make changes to the device and/or to this documentation without prior notice. This documentation is intended solely as an
information resource for experts, and will be updated only at their request.
Copyright and other protected rights
The content of this documentation, in particular its design, text, software,
technical drawings, configurations, graphics, images, data and their selection
and its composition and any amendments to it ("content") are protected by
copyright. The content must not (in whole or in part) be modified, copied, distributed, reproduced, republished, displayed, transmitted or sold without the
prior written consent of Dräger.
Definitions
WARNING!
An important advisory indicating a potentially hazardous situation which
may result in death or serious injury if not prevented.
CAUTION
An important advisory indicating a potentially hazardous situation which
may result in minor or moderate injury to the user or to patients or in damage to the device or to other assets if not prevented.
NOTE
An additional advisory intended to avoid problems in using or servicing the
device.
=
Identification of actual condition
Maintenance
=
Measures to maintain the specified condition
Repair
=
Measures to restore specified
condition
Servicing
=
Inspection, maintenance, repair
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Inspection
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General
General notes
Notes
Read through each section thoroughly before beginning servicing. Always
use the correct tools and the specified test equipment. Otherwise the device
may not work correctly or may be damaged.
WARNING!
– Dräger recommends using original Dräger parts for servicing. Otherwise the device's correct functioning could be compromised.
–
Pay attention to the „Servicing“ section of the Instructions for Use.
CAUTION
Improper servicing.
Device not working or working incorrectly.
–
Servicing may only be carried out by experts.
NOTE
Where reference is made to legislation, regulations and standards, in
respect of devices used and serviced in Germany they are based on the
laws of Germany. Users and technicians in other countries must comply
with their national laws and/or international standards.
CAUTION
Non-conforming test values.
Device not working or working incorrectly.
–
Do not put the device into operation.
–
Contact your local service organization.
CAUTION
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Before carrying out any servicing, check that the device and its components have been handed over by the user cleaned and disinfected.
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General
General notes
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Abbreviations
This section contains a list of the abbreviations used in this document.
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List of abbreviations ...........................................................................................................................
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Abbreviations
List of abbreviations
List of abbreviations
Abbreviations
10
Explanation
ADC
Analog/Digital Converter
APRV
Airway Pressure Release Ventilation
ATC
Automatic Tube Compensation
autoPPS
automatic Proportional Pressure Support
bpm
breaths per minute
BSP
Board Support Package
BTPS
Body Temperatur Pressure Saturated, measurements
referred to conditions of the patient's lung, body temperature 37 °C, ambient pressure, water vapor saturated
gas
C
Compliance
CDPOC
Cross Domain Point of Care Application
' Psupp
Pressure support Psupp setting relative to PEEP
DAC
Digital/Analog Converter
dynamic PEEPi
Positive end-expiratory pressure
EAST
Electronic Accessory Signature Technology
EEPROM
Electrically Erasable Programmable Read Only Memory
EMC
Electro Magnetic Compatibility
f
Respiratory rate
fEIT
functional Electrical Impedance Tomography
FiO2
Inspiratory O2 concentration
FPGA
Field Programmable Gate Array
FRC
Free Residual Capacity
Heliox
Gas mixture, mostly 79% helium, 21% oxygen
I: E
Inspiratory-to-expiratory time ratio
ILV
Independent Lung Ventilation
LVDS
Low Voltage Differential Signaling
MEDIBUS
Dräger communications protocol for medical devices
MMV
Mandatory Minute Volume Ventilation
MV
Minute Volume = product of the VT and f settings (VT x
f)
MVi
Inspiratory minute volume
NIF
Measurement of Negative Inspiration Force
NIV
Non-Invasive Ventilation (mask ventilation)
NTPD
Normal Temperature Pressure Dry
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Abbreviation
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Abbreviations
List of abbreviations
Abbreviation
Explanation
Operational amplifier
Pa
Pascal, unit of pressure; 1 mbar = 100 Pa = 1 hPa; 1 bar
= 100 kPa = 1000 hPa
PAN
Patient Area Network
Paw
Airway pressure
PI
Product Integration
Pinsp
Setting of the upper pressure level in Pressure Control
mode
PIP
Measured inspiratory peak pressure
Pmax
Setting of the maximum permitted airway pressure
Pmean
Mean airway pressure
PPS
Proportional Pressure Support
R
Resistance
RFID
Radio Frequency Identification
SC
System Cable
SPI
Serial Peripheral Interface
VG
Volume Guarantee
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OP
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Abbreviations
List of abbreviations
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Function descriptions
This chapter contains descriptions of the device's technical functions.
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General points about the workstation ................................................................................................
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Function descriptions
General points about the workstation
General points about the workstation
Introduction
The following provides a brief introduction to the workstation. The detailed
functionality of the electronic and pneumatic components is set out in the
function description Electronic assembly and Pneumatic assembly.
Design
Front view of workstation
Item
14
Designation
1
Display unit
2
Ventilation unit
3
Trolley option
4
Gas supply unit option
5
Power supply unit option
6
Nebulizer option
7
Humidifier option
8
Other devices and accessories from Dräger or third parties (see accessories list)
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Fig. 1
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Function descriptions
General points about the workstation
The modular workstations permit implementation of standardized treatment
processes and procedures in all areas of care. All functional units of a workstation can be deployed in different care environments. The workstations are
configured according to customer requirements. They comprise monitoring
and control displays as well as additional units, devices or accessories.
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Functional principle
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Function descriptions
General points about the workstation
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Function descriptions pneumatic assembly
This chapter contains descriptions of the pneumatic components and of the
device's technical functions.
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23
30
32
34
37
40
43
46
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Pneumatic assembly ..........................................................................................................................
Gas metering module M1.3................................................................................................................
Basics of flow measurement ..............................................................................................................
Explanation of the terms NTPD, BTPS and NTPS ............................................................................
Inspiratory unit/safety valve unit.........................................................................................................
Neonatal expiratory valve ..................................................................................................................
Calibration unit ...................................................................................................................................
PATO O2 sensor M12.4.....................................................................................................................
Nebulizer/ejector option .....................................................................................................................
Blower adapter...................................................................................................................................
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Function descriptions pneumatic assembly
Pneumatic assembly
Pneumatic assembly
Introduction
The pneumatic components are actuated by the electronics and regulate the
ventilation pressure and ventilation flow to the patient. The following details
the design and function of the pneumatic assembly.
Design
The pneumatic assembly consists of the following main components:
Main pneumatic components
Item
18
Designation
Design
A
Gas metering module M1.3
For a detailed description see Gas
metering module M1.3
B
Inspiratory unit/safety valve
unit module
For a detailed description see Inspiratory unit/safety valve unit
C
Neonatal expiratory valve
module
For a detailed description see
Neonatal expiratory valve
D
Silencer
The sound absorber is an integral
part of the neonatal expiratory valve
module
E
Barometric pressure sensor
The barometric pressure sensor is
located on the PI Main PCB. For a
detailed description see Main PCB
F
Pressure measurement module, PVT Monitoring PCB
M4.1
For a detailed description see PVT
Monitoring PCB M4.1
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Fig. 2
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Function descriptions pneumatic assembly
Pneumatic assembly
Item
Designation
Design
G
Calibration unit module
For a detailed description see Calibration unit
H
PATO-O2 sensor module
M12.4
The PATO O2 sensor M12.4 is pneumatically connected via an attenuator
(1) to the calibration unit (G). For a
detailed description see PATO O2
sensor M12.4
I
Nebulizer/ejector option
For a detailed description see Nebulizer/ejector option
J
Attenuator
The attenuator provides a laminar
flow of the mixed gas to the PATO O2
sensor M12.4.
K
Blower adapter
This blower adapter is only installed if
the gas supply unit option is fitted. For
a detailed description see Blower
adapter
Functional principle
Fig. 3
Functional principle of the pneumatics
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Item
Designation
Item
Designation
1
Gas inlet - Air
15
Neonatal flow sensor (S4)
2
Gas inlet - O2
16
Barometric pressure sensor (S8)
3
Air non-return valve (M1_3_CV1)
17
Calibration valve (V8) for inspiratory pressure sensor (S9)
4
O2 non-return valve (M1_3_CV2)
18
Inspiratory pressure sensor (S9)
5
Air metering valve (M1_3_V1)
19
Calibration valve (V6) for expiratory pressure sensor (S6)
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Function descriptions pneumatic assembly
Pneumatic assembly
Item
Designation
Item
Designation
6
O2 metering valve (M1_3_V2)
20
Expiratory pressure sensor (S6)
7
Gas mixing tank
21
PATO O2 sensor (S1)
8
Mixed gas metering valve (M1_3_V3)
22
Nebulizer outlet
9
Safety valve (V5)
23
Air pressure regulator (PR1)
10
Emergency expiratory valve (SV2)
24
O2 pressure regulator (PR2)
11
Emergency respiratory valve (SV3)
25
Nebulizer mixing valve (V10)
12
Patient's lung
26
Nebulizer switching valve (V9)
13
Expiratory valve (V16)
27
Ejector switching valve
14
Non-return valve (CV5)
28
Ejector
29
Silencer
30
CO2 sensor (optional) (S5)
The gas metering module M1.3 (A) delivers the timed variable flow of a gas
mixture with adjustable O2 and air content. Gas from the (central) supply system enters the device via the gas inlet ports for O2 and air (1, 2). Two nonreturn valves (3, 4) prevent each gas from flowing back into the supply line of
the other. The gases are mixed in the tank (7), and the mixing process is controlled by way of two regulated valves (5, 6). The delivered inspiratory flow is
controlled by way of a third regulated valve (8).
The inspiratory unit/safety valve unit module (B) comprises the safety
valve (9) and two non-return valves (10, 11). In normal operation the safety
valve is closed, so that the inspiratory flow passes from the gas mixing and
metering module to the patient (12). In the other operating states, such as
when the Babylog VN500 is in Standby mode, the safety valve is open and
permits spontaneous inspiration through the emergency respiratory valve
(11). The emergency expiratory valve (10) provides a second channel for
spontaneous expiration if the expiratory branch is blocked.
The Neonatal expiratory valve module (C) consists of the expiratory valve
(13) and a non-return valve (14). The expiratory valve is a proportional valve,
and its purpose is to adjust the pressure in the respiratory system. The nonreturn valve (14), in conjunction with the emergency air outlet valve (10), prevents rebreathing during spontaneous breathing. The neonatal flow sensor
(D, 15) measures the inspiratory and expiratory flow based on the hot-wire
anemometry measuring principle. Therefore the measured flow is a mass
flow (NTPD).
The ejector (28) of the drug nebulizer / ejector drive assembly (I) generates
the negative pressure required for the HFO mode. The ejector valve (27) supplies the required driving gas.
In order to reduce disturbing noise, the flow downstream of the expiratory
valve (13) is vented to atmosphere via the sound absorber (D, 29).
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Conversion of the mass flow into a volumetric flow (BTPS) requires knowledge of the ambient pressure. The ambient pressure is measured with the
barometric pressure sensor (E, 16).
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Function descriptions pneumatic assembly
Pneumatic assembly
For cleaning purposes, the inspiratory unit, the expiratory valve, and the
sound absorber assemblies can be removed from the Babylog VN500.
The pressure in the respiratory system is measured by two independent pressure sensors (18, 20). They together make up the pressure measurement
module (F). The pressure sensors are balanced cyclically. For that purpose,
the pressure sensors are vented to atmosphere via the two calibration valves
(17, 19). Together with an additional calibration valve for the O2 sensor (21),
the calibration valves make up the calibration unit (G).
The PATO O2 sensor (H, 21) measures the inspiratory O2 concentration
based on a sidestream measuring principle. For calibration by the user in the
device check, the O2 sensor can be flushed with pure O2 from the tank (7).
For drug nebulizing, a pneumatic drug nebulizer can be connected to the
nebulizer gas outlet (22). To drive the drug nebulizer the Babylog VN500
delivers an intermittent gas flow comprising O2 and air. Cycling of the two
gases ensures that the variation from the preset O2 concentration remains
within the specified limits. The gas from the two gas inlet ports (1, 2) is throttled by the pressure regulators (23, 24) for the purpose. The gases are cycled
by means of the nebulizer mixing valve (25). The nebulizer switching valve
(26) closes the nebulizer gas outlet when the nebulizer function is not active.
The nebulizer mixing valve, the nebulizer switching valve and the two pressure regulators make up the optional nebulizer/ejector module (I).
The CO2 concentration of the respiratory gas can be measured with the
optional MCable-Mainstream CO2 sensor (27). The CO2 is measured in the
main stream based on an optical measuring principle.
The internal gas consumption figures of the VN500 in standby mode are < 1
L/min AIR and < 2 L/min O2; in operating mode 2 L/min basic consumption
(gas mixture as per FiO2 setting) + ventilation dependent on minute volume
(gas mixture as per FiO2 setting).
The gas return flow of the device meets the requirements laid down in section
6 of the ISO 11195:1995 standard: "Gas mixers for medical use - single
devices".
The following illustration show an overview of the existing pneumatic connections mentioned in the function description.
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Connections and interfaces
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Function descriptions pneumatic assembly
Pneumatic assembly
Fig. 4
Item
Pneumatic connections of the Infinity VN500
Designation
Item
Designation
Neonatal expiratory valve
4
Nebulizer port
2
Inspiratory unit with safety valve
5
Silencer
3
Safety valve gas inlet
6
Connection for AIR compressed gas tube
7
Connection for O2 compressed gas tube
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Function descriptions pneumatic assembly
Gas metering module M1.3
Gas metering module M1.3
Introduction
The gas metering module M1.3 delivers the timed variable flow of a gas mixture with adjustable O2 and air. The following details the design and function
of the gas metering module M1.3.
Design
The gas metering module M1.3 forms a complete function unit and comprises
the following main components:
Fig. 5
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Item
Main components
Designation
Design
1
Valve drive
The valve drive controls the proportional valve M1_3_V3 and is attached
to the housing of the gas outlet. The
upper diaphragm of the proportional
valve M1_3_V3 is also housed in the
valve drive.
2
M1.3 PCB
The PCB includes the electronics for
the gas metering module.
3
Gas inlet housing
The housing of the gas inlet incorporates the gas connections for O2 and
AIR/Heliox, the filters M1_3_F1/F2,
the metering unit M1_3_R1 and the
non-return valves M1_3_CV1 / CV2.
4
AIR/Heliox proportional valve
The AIR/Heliox proportional valve is
located on the housing of the gas
inlet.
5
O2 proportional valve
The O2 proportional valve is located
on the housing of the gas inlet.
6
AIR/Heliox flow sensor
The flow sensor is located behind the
cap.
7
O2 flow sensor
The flow sensor is located behind the
cap.
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Function descriptions pneumatic assembly
Gas metering module M1.3
Item
Designation
Design
8
Mixing tank
The mixing tank is located between
the housings of the gas inlet and gas
outlet.
9
Cover
Behind the cap are the gas inlets from
the O2, AIR/Heliox flow sensors, the
optional blower, and the gas feed to
the mixing tank.
10
Gas outlet housing
In the housing of the gas outlet are
the lower diaphragm of the proportional valve M_1_3_V3 and the flow
sensor M1_3_S3.
Functional principle
Fig. 6
Principle
Two proportional valves mix oxygen and air or Heliox (a mixture of helium
and oxygen) from a central compressed gas supply into a mixing tank based
on preset parameters. A proportional valve downstream of the mixing tank
meters the inspiratory flow from the tank to the patient.
A blower can also be connected in place of the compressed gas supply.
A printed circuit board (PCB) amplifies the measured values of the sensors,
converts them into digital signals (A/D converter) and delivers them to a
microprocessor system by way of the interface. A D/A converter and amplifier
are used to operate the valves and calibrate the flow sensors.
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Sensors measure the flow, pressure and temperature of the gases. Together
with the actuators of the valves, they form a control circuit for precise metering of the patient flow.
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Function descriptions pneumatic assembly
Gas metering module M1.3
Pneumatics function
Fig. 7
Pneumatic diagram
Item
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The pneumatic system is supplied with gas via central supply ports or by an
optional blower. Proportional valves control the gas flow at the gas outlet.
Designation
Pneumatics function
M1_3_C1/C2
AIR/Heliox, O2 supply inlet
Compressed air/Heliox and oxygen from a central
gas supply is connected to the ports M1_3_C1
and M1_3_C2.
M1_3_F1/F2
Filter
The gas flows through the filters M1_3_F1/F2 to
the non-return valves.
M1_3_R1
Metering unit 0.7 L/min/6 bar
The mechanical design of filters M1_3_F1 and
M1_3_R1 together forms a water trap for the
AIR/Heliox connection. A continuous flow of 0.7
L/min discharges any moistures by way of the
metering unit.
M1_3_CV1/CV2
Non-return valve
From the non-return valves M1_3_CV1/ CV2 the
gas flows to the proportional valves M1_3_V1/V2.
M1_3_C4/C5
Additional AIR/Heliox and O2 outlet
Options such as a nebulizer or ejector can be connected to the auxiliary outlet C4. The port C5 is
used to calibrate the O2 sensor.
M1_3_V1/V2
Proportional valve
The proportional valves meter air/Heliox and oxygen into the tank according to the preset O2 concentration and the pressure in the mixing tank
(200 to 400 mbar) (closed pressure control loop).
The flow of the proportional valves is measured by
the downstream flow sensors M1_3_S1/S2.
M1_3_F4/F5
Filter (component of flow sensor)
The function of the two filters M1_3_F4/F5
upstream of the flow sensors is to keep the flow
steady.
Workstation Neonatal Care
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